oral mucosa
The term mucous membrane is used to describe the moist lining of the gastrointestinal tract, nasal passages, and other body cavities that communicate with the exterior. In the oral cavity this lining is referred to as the oral mucous membrane, or oral mucosa. At the lips the oral mucosa is continuous with the skin; at the pharynx the oral mucosa is continuous with the mucosa lining the rest of the gut. Thus the oral mucosa is located anatomically between skin and gastrointestinal mucosa and shows some of the properties of each.
CLASSIFICATION
The classification based on these functional criteria, divides the oral mucosa into three major types:
1. Masticatory mucosa 25% (gingiva and hard palate)
2. Lining or reflecting mucosa 60% (lip, cheek, vestibular fornix, alveolar mucosa, floor of mouth and soft palate)
3. Specialized mucosa 10% (dorsum of the tongue and taste buds)
Based on keratinization:
KERATINIZED MUCOSA—
MASTICATORY MUCOSA
VERMILLION BORDER OF LIPS
NON KERATINIZED MUCOSA–
LINING MUCOSA
SPECIALIZED MUCOSA
DEVELOPMENT OF ORAL MUCOSA
The epithelium of the oral cavity is derived from both the ectoderm and the endoderm. The anterior part of the oral cavity is lined by the epithelium derived from the ectoderm.
By 13–20 weeks differences between keratinized and nonkeratinized mucosa becomes apparent. Keratohyaline granules in the keratinized mucosa and region specific cytokeratin appear.
Lingual papillae appear early at about 7th week; the circumvallate and foliate papillae appear earlier than filiform papillae, which can be recognized by 10–12 weeks.
FUNCTIONS OF ORAL MUCOSA
DEFENSE
1.Effective barrier for the entry of the microorganisms.
2.The oral mucosa is impermeable to bacterial toxins. It also secretes antibodies and has an efficient humoral and cell mediated immunity.
LUBRICATION
The secretion of salivary glands keeps the oral cavity moist and thus prevents the mucosa from drying and cracking thereby ensuring an intact oral epithelium.
A moist oral cavity helps in speech, mastication, swallowing and in the perception of taste.
SENSORY
The oral mucosa is sensitive to touch, pressure, pain and temperature.
The sensation of taste is a unique sensation, felt only in the anterior 2/3rd of the dorsum of the tongue.
Swallowing, gagging, retching and salivating reflexes are initiated by receptors in the oral mucosa.
Touch sensations in the soft palate results in gag reflex
PROTECTION
The oral mucosa protects the deeper tissues from mechanical forces resulting from mastication and from abrasive nature of foodstuffs.
The document summarizes key aspects of oral mucosa development and structure. It describes that the oral mucosa lines the oral cavity and has different types (masticatory, lining, specialized) according to function. The mucosa develops from the primitive oral cavity and includes structures from branchial arches. It matures through specific stages in utero, developing characteristic features like papillae. The mucosa has stratified squamous epithelium and contains minor salivary glands. It has specialized junctions like desmosomes that maintain the epithelial barrier and allow cell renewal processes.
Development of salivary glands , saliva and its role in prosthodonticsRavi banavathu
This document provides an overview of salivary glands including their embryology, anatomy, histology, function and role in prosthodontics. It discusses the three major pairs of salivary glands, their development and classification. The composition and properties of saliva are described along with how it aids in prosthodontic retention. Several studies examining the impact of saliva on denture treatment and its diagnostic potential are also summarized.
The pulp is a soft connective tissue located within the tooth. It has several unique features, including being surrounded by rigid dentin walls and susceptible to changes in pressure. The pulp contains odontoblasts, fibroblasts, undifferentiated cells, and defense cells. It is highly vascularized and innervated. During development, dental papilla forms the pulp through proliferation and differentiation of cells. The pulp cavity is divided into coronal and radicular regions. Nerves and blood vessels enter through the apical foramen, supplying the pulp.
The document describes the anatomy and histology of the oral cavity. It discusses the boundaries and subdivisions of the oral cavity. It describes the layers of the oral epithelium including the stratum basale, stratum spinosum, stratum granulosum, and stratum corneum. It discusses the types of oral mucosa including masticatory, lining, and specialized mucosa. It also describes the lamina propria, submucosa, blood and nerve supply of the oral cavity.
This document provides an overview of the histology of the major salivary glands, including the parotid, submandibular, and sublingual glands. It describes the secretory end pieces composed of serous and mucous cells, as well as the ductal system including intercalated, striated, and excretory ducts. The minor salivary glands are also briefly discussed. The roles of myoepithelial cells and the different cell types involved in saliva production are summarized.
Enamel presentation. prepared by mohammed yahiaMaher Aziz
This document discusses the structure and formation of enamel. It begins by defining enamel and outlining its formation through the stages of odontogenesis and amelogenesis. Key details are provided on the histological layers involved in enamel formation, as well as the life cycle of ameloblasts. The physical and chemical properties of enamel are then examined, including its hardness, permeability and solubility. The document concludes by describing various histological features of enamel such as enamel rods, striations of Retzius, and the dentino-enamel junction.
The document summarizes the development of teeth from the initial formation of the primary epithelial band and dental lamina through the bud, cap and bell stages. It describes how the enamel organ and surrounding dental papilla and sac develop during these stages. Key stages of root formation controlled by Hertwig's epithelial root sheath are also outlined. The timeline of human tooth development from 6 weeks gestation through adulthood is provided. Molecular insights regarding signaling pathways such as FGF, SHH and BMPs controlling tooth morphogenesis and patterning are discussed.
The presentation discusses about tooth enamel in detail including its formation, characteristics, structure and histological features along with its clinical considerations. It is well supported with diagrams for better understanding of the text.
Suggestions and feedback will be well appreciated.
The document summarizes key aspects of oral mucosa development and structure. It describes that the oral mucosa lines the oral cavity and has different types (masticatory, lining, specialized) according to function. The mucosa develops from the primitive oral cavity and includes structures from branchial arches. It matures through specific stages in utero, developing characteristic features like papillae. The mucosa has stratified squamous epithelium and contains minor salivary glands. It has specialized junctions like desmosomes that maintain the epithelial barrier and allow cell renewal processes.
Development of salivary glands , saliva and its role in prosthodonticsRavi banavathu
This document provides an overview of salivary glands including their embryology, anatomy, histology, function and role in prosthodontics. It discusses the three major pairs of salivary glands, their development and classification. The composition and properties of saliva are described along with how it aids in prosthodontic retention. Several studies examining the impact of saliva on denture treatment and its diagnostic potential are also summarized.
The pulp is a soft connective tissue located within the tooth. It has several unique features, including being surrounded by rigid dentin walls and susceptible to changes in pressure. The pulp contains odontoblasts, fibroblasts, undifferentiated cells, and defense cells. It is highly vascularized and innervated. During development, dental papilla forms the pulp through proliferation and differentiation of cells. The pulp cavity is divided into coronal and radicular regions. Nerves and blood vessels enter through the apical foramen, supplying the pulp.
The document describes the anatomy and histology of the oral cavity. It discusses the boundaries and subdivisions of the oral cavity. It describes the layers of the oral epithelium including the stratum basale, stratum spinosum, stratum granulosum, and stratum corneum. It discusses the types of oral mucosa including masticatory, lining, and specialized mucosa. It also describes the lamina propria, submucosa, blood and nerve supply of the oral cavity.
This document provides an overview of the histology of the major salivary glands, including the parotid, submandibular, and sublingual glands. It describes the secretory end pieces composed of serous and mucous cells, as well as the ductal system including intercalated, striated, and excretory ducts. The minor salivary glands are also briefly discussed. The roles of myoepithelial cells and the different cell types involved in saliva production are summarized.
Enamel presentation. prepared by mohammed yahiaMaher Aziz
This document discusses the structure and formation of enamel. It begins by defining enamel and outlining its formation through the stages of odontogenesis and amelogenesis. Key details are provided on the histological layers involved in enamel formation, as well as the life cycle of ameloblasts. The physical and chemical properties of enamel are then examined, including its hardness, permeability and solubility. The document concludes by describing various histological features of enamel such as enamel rods, striations of Retzius, and the dentino-enamel junction.
The document summarizes the development of teeth from the initial formation of the primary epithelial band and dental lamina through the bud, cap and bell stages. It describes how the enamel organ and surrounding dental papilla and sac develop during these stages. Key stages of root formation controlled by Hertwig's epithelial root sheath are also outlined. The timeline of human tooth development from 6 weeks gestation through adulthood is provided. Molecular insights regarding signaling pathways such as FGF, SHH and BMPs controlling tooth morphogenesis and patterning are discussed.
The presentation discusses about tooth enamel in detail including its formation, characteristics, structure and histological features along with its clinical considerations. It is well supported with diagrams for better understanding of the text.
Suggestions and feedback will be well appreciated.
The document describes the life cycle of ameloblasts and the process of amelogenesis. There are seven stages in the life cycle of ameloblasts: 1) morphogenic, 2) differentiation, 3) secretory, 4) transitional, 5) maturative, 6) protective, and 7) desmolytic. Amelogenesis involves two processes - formation of the enamel matrix through protein secretion and mineralization through hydroxyapatite deposition and maturation. Defects in amelogenesis can result from conditions like febrile diseases or tetracycline intake, producing malformed or discolored enamel. Enamel undergoes age-related changes like attrition, discoloration, and increased hardness due
Coronal and radicular pulp
Apical foramen
Accessory canal
Functions of dental pulp
Components of dental pulp
Functions of pulpal extracellular matrix
Organization of cells in the pulp
The principle cells of the pulp
The pathways of collagen synthesis
Matrix and ground substances
Vasculature and lymphatic supply
Innervation of Dentin- pulp complex
Disorders of the dental pulp
Advances in pulp vitality testing
This document provides information on cementum, including its definition, physical characteristics, chemical composition, formation (cementogenesis), classification, functions, anomalies, and clinical considerations. Cementum is the mineralized tissue covering tooth roots. It is softer than dentin and lacks enamel's luster. Cementum formation involves acellular and cellular stages. Cementum attaches the periodontal ligament fibers to the tooth root and allows for tooth repair. Abnormalities include hypercementosis, ankylosis, and cementomas. Cementum is an important part of the periodontium that aids in tooth attachment and repair.
The document describes the anatomy and morphology of maxillary central incisors. Key points:
- Maxillary central incisors are the largest anterior teeth, located bilaterally in the maxilla near the midline.
- Their primary functions are biting, cutting, and shearing food during mastication.
- Anatomically, they have convex labial surfaces, developmental depressions, cingula and lingual fossae on their crowns. Their roots are single, tapered and wider labially.
- Dimensions and developmental timing are also provided.
Amelogenesis is the formation of enamel. During amelogenesis, the ameloblast (enamel-forming cells) undergo various stages i.e the life cycle of ameloblast.
For more content check out my blog: www.rkharitha.wordpress.com "a little about everything dental"
The dental pulp is a soft connective tissue located within the tooth. It supports the dentin and provides nutrition for tooth development. The pulp is divided into the coronal pulp in the crown and the radicular pulp in the roots. The coronal pulp contains pulp horns that extend into tooth cusps while the radicular pulp tapers toward the apical foramen. The pulp contains cells like odontoblasts, fibroblasts, and immune cells and has functions like tooth development, nutrition, sensation, repair, and defense against pathogens. Changes with aging include decreased cell size and number as well as increased fibrosis and calcification. Clinical considerations for the pulp include its shape, size changes with age, and the effects of
It is a presentation in detail about the strongest structure of the oral cavity "ENAMEL". It is a simple topic but people find it difficult to learn about it. I hope my presentation is a simple method to learn about it. I would like to thank my professors for assign me this project and i learn't a lot from it and still learning my basics daily.
The document discusses the histology of oral mucosa and gingiva. It describes the epithelium, lamina propria, submucosa, and organization of oral mucosa. The epithelium can be keratinized or non-keratinized. Gingiva specifically surrounds the teeth and consists of free gingiva, attached gingiva, and interdental papillae. The document provides detailed information on the structure and layers of oral mucosa and gingiva.
1. Amelogenesis involves the life cycle of ameloblasts from the pre-secretory to post-secretory phases as they form enamel.
2. In the secretory phase, ameloblasts deposit enamel matrix proteins and undergo partial mineralization, developing Tome's process which is responsible for enamel rod and interrod formation.
3. Enamel maturation then occurs, fully mineralizing the enamel from the dentin-enamel junction outward in a gradual process modulated by alternating ameloblast types.
The document discusses the development of teeth from the dental lamina stage through the various bell stages. It describes how the enamel organ, dental papilla, and dental sac form and their roles in tooth development. The stages of tooth development including bud, cap, and bell stages are summarized. Clinical conditions related to abnormalities in tooth development like dentinogenesis imperfecta, Hutchinson's incisor, and fusion are also mentioned.
1. Tooth development occurs in 8 stages from bud to eruption. It begins with the formation of the primary epithelial band at 6 weeks of development.
2. There are 3 main stages of tooth development: bud, cap, and bell stage. In the bud stage, epithelial buds form surrounded by mesenchyme. In the cap stage, the enamel organ forms a cap shape over the dental papilla.
3. In the bell stage, the enamel organ resembles a bell deepening over the dental papilla. Histodifferentiation of ameloblasts and odontoblasts occurs and tooth shape is established.
Centered in the maxilla, one on either side of median line, with mesial surface of each in contact with mesial surface of other
Two in number
Larger than the lateral incisor
These teeth supplement each other in function, and they are similar anatomically
Shearing or cutting teeth
Major function is to punch and cut food material during the process of mastication
These teeth have incisal ridges or edges rather than
cusps such as are found on canines & posterior teeth
First evidence of calcification
Crown completion
Eruption
Root completion
3-4 months
4-5 years
7-8 years
10-11 years
Hertwig's epithelial root sheath (HERS) is a bilayered structure that forms the root of a tooth. It consists of inner and outer enamel epithelium layers but lacks the intermediate and stellate reticulum layers found in the enamel organ. HERS induces the differentiation of dental papilla cells into odontoblasts, which then form radicular dentin. After the first layer of dentin is laid down, HERS breaks down and its remnants, called rests of Malassez, remain near the root surface in the periodontal ligament. These remnants can form enamel pearls if still attached to dentin. HERS plays a key role in determining root shape, size, and number and in
This document discusses the histology of the temporomandibular joint (TMJ). It describes the four main anatomical parts: the mandibular condyle, mandibular fossa and articular eminence, articular disc, and articular capsule. The mandibular condyle articulates with the temporal bone and is composed of cancellous bone covered by fibrous tissue. The mandibular fossa and articular eminence are composed of bone and fibrous tissue. The articular disc separates the joint into two compartments and is composed of dense fibrous tissue. The articular capsule encloses the joint and is lined by a synovial membrane that produces synovial fluid to lubricate
VIVA for ORAL Histology BY TARUN ParmarTarun Parmar
Accessory canals are connections established between the radicular pulp and periapical tissues during root formation due to premature loss of root sheath cells or when the developing root encounters blood vessels. Acellular cementum is the cementum in the apical third of the root that does not consist of cementocytes. Alkaline phosphatase is an enzyme associated with hard tissue formation or mineralization that supplies phosphate ions needed for mineralization.
Cementum also commonly known as root cementum , is a highly mineralized tissue covering the entire root surface.
Cementum is also often referred to as a bone-like tissue. Cementum contains two types of fibers, mainly extrinsic (Sharpey's) fibers and intrinsic fibers. Fibroblasts and cementoblasts are the fiber secreting cells.
The mandibular lateral incisor is the second tooth from the midline in the lower jaw. It is slightly wider than the central incisor and complements its function. The lateral incisor develops crown completion at 4-5 years and typically erupts around 7-8 years of age. Key distinguishing features are its twisted appearance due to the lingually curved incisal edge and displaced cingulum on the lingual surface. The distal root surface often has a more pronounced concavity compared to the mesial surface.
Important topic for dentists, study of the topic not only describes the oral mucosa but also elaborates the uniqueness and differentiation of oral mucosa from rest of the skin parts. Gives the idea about the cell differention and its migration to the superficial layer and related abnormalities.
The oral mucosa is the moist lining of the oral cavity that continues with the skin and esophagus. It has three main functions - protection, sensation, and secretion. It protects the deeper tissues from mechanical forces and toxins, senses stimuli like temperature and pain, and secretes saliva through minor salivary glands. The oral mucosa varies between keratinized mucosa covering areas like the gingiva and hard palate, non-keratinized mucosa in areas like the floor of the mouth and cheeks, and specialized mucosa bearing taste buds on the tongue.
The document describes the life cycle of ameloblasts and the process of amelogenesis. There are seven stages in the life cycle of ameloblasts: 1) morphogenic, 2) differentiation, 3) secretory, 4) transitional, 5) maturative, 6) protective, and 7) desmolytic. Amelogenesis involves two processes - formation of the enamel matrix through protein secretion and mineralization through hydroxyapatite deposition and maturation. Defects in amelogenesis can result from conditions like febrile diseases or tetracycline intake, producing malformed or discolored enamel. Enamel undergoes age-related changes like attrition, discoloration, and increased hardness due
Coronal and radicular pulp
Apical foramen
Accessory canal
Functions of dental pulp
Components of dental pulp
Functions of pulpal extracellular matrix
Organization of cells in the pulp
The principle cells of the pulp
The pathways of collagen synthesis
Matrix and ground substances
Vasculature and lymphatic supply
Innervation of Dentin- pulp complex
Disorders of the dental pulp
Advances in pulp vitality testing
This document provides information on cementum, including its definition, physical characteristics, chemical composition, formation (cementogenesis), classification, functions, anomalies, and clinical considerations. Cementum is the mineralized tissue covering tooth roots. It is softer than dentin and lacks enamel's luster. Cementum formation involves acellular and cellular stages. Cementum attaches the periodontal ligament fibers to the tooth root and allows for tooth repair. Abnormalities include hypercementosis, ankylosis, and cementomas. Cementum is an important part of the periodontium that aids in tooth attachment and repair.
The document describes the anatomy and morphology of maxillary central incisors. Key points:
- Maxillary central incisors are the largest anterior teeth, located bilaterally in the maxilla near the midline.
- Their primary functions are biting, cutting, and shearing food during mastication.
- Anatomically, they have convex labial surfaces, developmental depressions, cingula and lingual fossae on their crowns. Their roots are single, tapered and wider labially.
- Dimensions and developmental timing are also provided.
Amelogenesis is the formation of enamel. During amelogenesis, the ameloblast (enamel-forming cells) undergo various stages i.e the life cycle of ameloblast.
For more content check out my blog: www.rkharitha.wordpress.com "a little about everything dental"
The dental pulp is a soft connective tissue located within the tooth. It supports the dentin and provides nutrition for tooth development. The pulp is divided into the coronal pulp in the crown and the radicular pulp in the roots. The coronal pulp contains pulp horns that extend into tooth cusps while the radicular pulp tapers toward the apical foramen. The pulp contains cells like odontoblasts, fibroblasts, and immune cells and has functions like tooth development, nutrition, sensation, repair, and defense against pathogens. Changes with aging include decreased cell size and number as well as increased fibrosis and calcification. Clinical considerations for the pulp include its shape, size changes with age, and the effects of
It is a presentation in detail about the strongest structure of the oral cavity "ENAMEL". It is a simple topic but people find it difficult to learn about it. I hope my presentation is a simple method to learn about it. I would like to thank my professors for assign me this project and i learn't a lot from it and still learning my basics daily.
The document discusses the histology of oral mucosa and gingiva. It describes the epithelium, lamina propria, submucosa, and organization of oral mucosa. The epithelium can be keratinized or non-keratinized. Gingiva specifically surrounds the teeth and consists of free gingiva, attached gingiva, and interdental papillae. The document provides detailed information on the structure and layers of oral mucosa and gingiva.
1. Amelogenesis involves the life cycle of ameloblasts from the pre-secretory to post-secretory phases as they form enamel.
2. In the secretory phase, ameloblasts deposit enamel matrix proteins and undergo partial mineralization, developing Tome's process which is responsible for enamel rod and interrod formation.
3. Enamel maturation then occurs, fully mineralizing the enamel from the dentin-enamel junction outward in a gradual process modulated by alternating ameloblast types.
The document discusses the development of teeth from the dental lamina stage through the various bell stages. It describes how the enamel organ, dental papilla, and dental sac form and their roles in tooth development. The stages of tooth development including bud, cap, and bell stages are summarized. Clinical conditions related to abnormalities in tooth development like dentinogenesis imperfecta, Hutchinson's incisor, and fusion are also mentioned.
1. Tooth development occurs in 8 stages from bud to eruption. It begins with the formation of the primary epithelial band at 6 weeks of development.
2. There are 3 main stages of tooth development: bud, cap, and bell stage. In the bud stage, epithelial buds form surrounded by mesenchyme. In the cap stage, the enamel organ forms a cap shape over the dental papilla.
3. In the bell stage, the enamel organ resembles a bell deepening over the dental papilla. Histodifferentiation of ameloblasts and odontoblasts occurs and tooth shape is established.
Centered in the maxilla, one on either side of median line, with mesial surface of each in contact with mesial surface of other
Two in number
Larger than the lateral incisor
These teeth supplement each other in function, and they are similar anatomically
Shearing or cutting teeth
Major function is to punch and cut food material during the process of mastication
These teeth have incisal ridges or edges rather than
cusps such as are found on canines & posterior teeth
First evidence of calcification
Crown completion
Eruption
Root completion
3-4 months
4-5 years
7-8 years
10-11 years
Hertwig's epithelial root sheath (HERS) is a bilayered structure that forms the root of a tooth. It consists of inner and outer enamel epithelium layers but lacks the intermediate and stellate reticulum layers found in the enamel organ. HERS induces the differentiation of dental papilla cells into odontoblasts, which then form radicular dentin. After the first layer of dentin is laid down, HERS breaks down and its remnants, called rests of Malassez, remain near the root surface in the periodontal ligament. These remnants can form enamel pearls if still attached to dentin. HERS plays a key role in determining root shape, size, and number and in
This document discusses the histology of the temporomandibular joint (TMJ). It describes the four main anatomical parts: the mandibular condyle, mandibular fossa and articular eminence, articular disc, and articular capsule. The mandibular condyle articulates with the temporal bone and is composed of cancellous bone covered by fibrous tissue. The mandibular fossa and articular eminence are composed of bone and fibrous tissue. The articular disc separates the joint into two compartments and is composed of dense fibrous tissue. The articular capsule encloses the joint and is lined by a synovial membrane that produces synovial fluid to lubricate
VIVA for ORAL Histology BY TARUN ParmarTarun Parmar
Accessory canals are connections established between the radicular pulp and periapical tissues during root formation due to premature loss of root sheath cells or when the developing root encounters blood vessels. Acellular cementum is the cementum in the apical third of the root that does not consist of cementocytes. Alkaline phosphatase is an enzyme associated with hard tissue formation or mineralization that supplies phosphate ions needed for mineralization.
Cementum also commonly known as root cementum , is a highly mineralized tissue covering the entire root surface.
Cementum is also often referred to as a bone-like tissue. Cementum contains two types of fibers, mainly extrinsic (Sharpey's) fibers and intrinsic fibers. Fibroblasts and cementoblasts are the fiber secreting cells.
The mandibular lateral incisor is the second tooth from the midline in the lower jaw. It is slightly wider than the central incisor and complements its function. The lateral incisor develops crown completion at 4-5 years and typically erupts around 7-8 years of age. Key distinguishing features are its twisted appearance due to the lingually curved incisal edge and displaced cingulum on the lingual surface. The distal root surface often has a more pronounced concavity compared to the mesial surface.
Important topic for dentists, study of the topic not only describes the oral mucosa but also elaborates the uniqueness and differentiation of oral mucosa from rest of the skin parts. Gives the idea about the cell differention and its migration to the superficial layer and related abnormalities.
The oral mucosa is the moist lining of the oral cavity that continues with the skin and esophagus. It has three main functions - protection, sensation, and secretion. It protects the deeper tissues from mechanical forces and toxins, senses stimuli like temperature and pain, and secretes saliva through minor salivary glands. The oral mucosa varies between keratinized mucosa covering areas like the gingiva and hard palate, non-keratinized mucosa in areas like the floor of the mouth and cheeks, and specialized mucosa bearing taste buds on the tongue.
To watch full lecture video please click the link
https://youtu.be/ZXcq3pweLjg
My youtube channel - Dr. deNto
We are discussing only the basics of oral mucosa membrane.
Definition
Classification
Components
1) Basement membrane
2) Lamina porpria
3) Submucosa
4) Epithelium
Keratinized and Nonkeratinized epithelium
Nonkeratinocytes
The document discusses the oral mucosa, or lining of the oral cavity. It describes the different regions of the oral mucosa, including the lips, cheeks, gingiva, palate, and tongue. It then explains the general structure of oral mucosa, which consists of epithelium, connective tissue, and submucosa layers. Finally, it provides details on the stratified squamous epithelium that makes up the oral lining, including the different cell layers and processes of cell proliferation, maturation, and desquamation.
This document describes the ultrastructure of gingiva. It is divided into three parts: marginal gingiva, attached gingiva, and interdental gingiva. Microscopically, gingiva consists of stratified squamous epithelium and connective tissue. The epithelium is classified into oral, sulcular, and junctional epithelium based on location and keratinization. The connective tissue contains fibers, ground substance, and cells. Collagen fibers provide strength while ground substance fills spaces. Gingival fibers attach gingiva firmly to teeth.
This document provides information on the oral mucous membrane (OMM). It defines OMM as the moist lining of the oral cavity that communicates with the exterior. The OMM consists of two layers - an epithelial layer and an underlying connective tissue layer. It is classified based on function into masticatory mucosa, lining mucosa, and specialized mucosa. Histologically, the OMM contains keratinized and non-keratinized epithelium made up primarily of keratinocytes and some non-keratinocytes like melanocytes and Langerhans cells. The document describes the microscopic structure of the different layers in keratinized and non-keratinized epithelium.
This document provides an overview of the oral mucosa. It defines oral mucosa as the moist lining of the oral cavity that is a continuation of the skin and esophagus. It discusses the roles of oral mucosa including protection, barrier function, immunological defense, and sensory input. It describes the development, organization, types (masticatory, lining, specialized), glands, component tissues, and structure of the oral mucosa in different regions like the keratinized gingiva and hard palate.
This document provides information on the oral mucous membrane (oral mucosa). It begins by defining the oral mucosa as the moist lining of the oral cavity, which is a continuation of the skin and esophagus. The document then describes the layers and boundaries of the oral cavity. It discusses the histology and classification of the oral mucosa, including the different types of epithelia (keratinized, non-keratinized). It also covers the structure, layers and keratinization process of the oral epithelium, as well as the characteristics and functions of the oral mucosa.
The oral cavity consists of oral mucosa that lines the inner parts of the lips, cheeks, floor of the mouth, hard and soft palates, and parts of the tongue. The oral mucosa can be classified into masticatory, lining, and specialized mucosa. Masticatory mucosa lines areas like the gingiva and hard palate that experience forces from chewing. Lining mucosa lines flexible areas like the lips, cheeks and soft palate. Specialized mucosa covers the tongue and contains taste buds. The oral mucosa is made up of stratified squamous epithelium and underlying connective tissue called the lamina propria. It provides protection, sensation and lubrication for the oral cavity.
Upload By : Ahmed Ali Abbas
Babylon University College of Dentistry
download this file from Website on google theoptimalsmile.wix.com/dentistry
Oral histology
Oral mucous membrane /certified fixed orthodontic courses by Indian dental ac...Indian dental academy
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Oral mucous membrane /certified fixed orthodontic courses by Indian dental ac...Indian dental academy
This document discusses the oral mucosa, including its development, functions, tissue components, and regional variations. It covers the epithelium, lamina propria, and submucosa layers of the oral mucosa and their characteristics. It also describes the different types of oral mucosa such as keratinized vs non-keratinized and their locations in the oral cavity. Key areas discussed in more depth include the hard palate, alveolar mucosa, vestibular spaces, and maxillary and mandibular edentulous ridges.
This document provides an overview of epithelium. It defines epithelium and discusses its development, characteristics, classification, functions, cell polarity, membrane specializations, glands, and renewal. Epithelium is avascular tissue that covers external surfaces and lines internal cavities. It is classified based on number of cell layers as simple (1 cell layer thick) or stratified (2 or more cell layers thick). The document describes different types of simple and stratified epithelia, their structures, and locations in the body. Epithelium has important protective, secretory, selective absorption and transportation functions enabled by its cell polarity and junctions.
This document summarizes the applied anatomy and behavioral changes of oral mucosa under complete denture prosthesis. It describes the development, structure, classification and topography of oral mucosa, focusing on how the tissues of the maxilla and mandible respond to dentures. It discusses the microscopic anatomy and clinical importance of different oral mucosa regions, such as the crest of the residual ridge, hard palate, vestibular spaces and limiting structures. The document emphasizes how understanding the oral tissues is essential for developing proper denture impression techniques and border forms.
The oral mucosa lines the inside of the mouth and consists of stratified squamous epithelium and an underlying connective tissue layer. It can be classified as masticatory, lining, or specialized mucosa depending on its location. The oral mucosa protects deeper tissues, senses changes within the mouth, and secretes saliva. Diseases that can affect the oral mucosa include oral cancer, leukoplakia, smoker's palate, and oral candidiasis. Melanocytes within the oral mucosa produce melanin, contributing to the color of the oral tissues.
This document provides an overview of epithelium. It defines epithelium as avascular tissue that covers external surfaces and lines internal cavities and tubes. Epithelium is derived from three germ layers and can be simple (one cell layer thick) or stratified (multiple cell layers thick). The document describes several types of simple and stratified epithelia based on cell shape, including squamous, cuboidal, columnar, transitional, and pseudostratified epithelia. It discusses epithelial cell characteristics, classification, functions, polarity, membrane specializations, glands, and renewal. In closing, it provides details on the structure of the oral epithelium.
This document provides an overview of epithelium, including its definition, development, characteristics, classification, functions, cell polarity, membrane specializations, glands, and structure of the oral epithelium. Some key points include:
- Epithelium covers body surfaces and lines cavities, and is composed of cells attached to a basement membrane. It develops from ectoderm, mesoderm, or endoderm.
- Epithelia are classified based on number of cell layers as simple (1 cell layer), pseudostratified (cells appear in multiple layers but are all attached to the basement membrane), or stratified (multiple cell layers).
- Epithelial cells exhibit polarity with specialized domains, and form
The term mucous membrane is used to describe the moist lining of the gastrointestinal tract, nasal passages, and other body cavities that communicate with the exterior. In the oral cavity, this lining is referred to as the oral mucous membrane, or oral mucosa. At the lips the oral mucosa is continuous with the skin; at the pharynx the oral mucosa is continuous with the mucosa lining the rest of the gut. Thus the oral mucosa is located anatomically between skin and gastrointestinal mucosa and
shows some of the properties of each.
The dental pulp is a soft connective tissue located within the tooth. It develops from the dental papilla during tooth formation. The pulp has four zones - the odontoblastic zone containing cells that form dentin, the cell-free zone, cell-rich zone containing many cells, and a central zone with large blood vessels and nerves. The pulp receives blood vessels through the apical foramen and contains many cell types including odontoblasts, fibroblasts, immune cells, and undifferentiated cells. It is highly innervated with sensory fibers that detect pain and sympathetic fibers that control blood flow. The pulp plays key roles in tooth development, defense against infection, and sensitivity.
oral mucous membranes-1 /orthodontic courses by Indian dental academy Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Restorative procedures require adequate isolation of the operating field for best results.
A clean and dry field is comfortable both for the patient and the operator.
It provides better access and visibility, improving the efficiency of the operator.
The properties of many dental materials are improved in the absence of moisture.
Isolation collects the materials from operating site and also prevents their aspiration.
Isolation also often permits the dentist to carry out extended operations if desired.
Goals of isolation:
Moisture control
Retraction and access
Harm prevention . Safe and aseptic operating field
Prevent accidental swallowing of restorative materials and instruments
Mineral trioxide aggregate, described in 1993, is an aggregate of mineral oxides added to “trioxides” of tricalcium silicate, tricalcium aluminate, and tricalcium oxide silicate oxide.
It was patented by Mahmoud Torabinejad and Dean White, and described it as the tooth filling material comprising of Portland cement ( TYPE 1)
hydraulic type of cement
Biodentine, a tricalcium silicate based dental material was introduced by Septodont in the year 2010known as “dentine in a capsule”
The product was synthesized de novo and was free from the impurities present in the derivatives of portland cement like MTA.
It helps in achieving biomimetic mineralisation within the depths of a carious cavity
Endodontic emergencies and mid term flare upsDR POOJA
An endodontic emergency is defined as pain and/or swelling caused by inflammation or infection of pulp and/or periradicular tissue necessitating an emergency visit to the dentist for immediate treatment.
The main causative factors responsible for occurrence of endodontic emergencies are:
Pathosis in pulp and periradicular tissues
Traumatic injuries
Recent studies report a 60-82% incidence of endodontic emergencies among all dental emergencies.
Within this group, 20-42% of patients seek care for teeth with symptomatic irreversible pulpitis (SIP) .
Additionally, about 60% of SIP patients also complain of symptomatic apical periodontitis (SAP)
The goal of management of endodontic emergencies is to quickly and effectively manage pain and infections thereby also minimizing the development of persistent pain and the formation of periapical pathology.
Microorganisms cause virtually all pathoses of the pulp and periapical tissues.
Once bacterial invasion of pulp tissues has taken place, both non-specific inflammation and specific immunologic response of the host have a profound effect on the progress of the disease.
Endodontic infection develops in root canals devoid of host defenses,
pulp necrosis (as a sequel to caries, trauma, periodontal disease,or iatrogenic operative procedures)
or pulp removal for treatment.
Biofilm-induced oral diseases.
ROUTES OF ROOT CANAL INFECTION
Caries
• Trauma-induced fractures
• Cracks
• Restorative procedures
• Scaling and root planing
• Attrition
• Abrasion
• Gaps in the cementoenamel junction
at the cervical root surface
• Dentinal tubules
• Direct pulp exposure
• Periodontal disease
• Anachoresis
Mechanisms of Microbial Pathogenicity and Virulence Factors
Pathogenicity : The ability of a microorganism to cause disease.
Virulence: Degree of pathogenicity of a microorganism.
Some microorganisms routinely cause disease in a given host and are called primary pathogens.
Other microorganisms cause disease only when host defenses are impaired and are called opportunistic pathogens by changing the balance of the host–bacteria relationship.
Bacterial strategies that contribute to pathogenicity include the ability to coaggregate and form biofilms.
In the pathogenesis of primary apical periodontitis
Bacteria in caries lesions form authentic biofilms adhered to dentin.
Diffusion of bacterial products through dentinal tubules induces pulpal inflammation
After pulp exposure, the exposed pulp tissue is in direct contact with bacteria and their products
and responds with severe inflammation. Some tissue invasion by bacteria may also occur.
Bacteria in the battlefront have to survive the attack from the host defenses and at the same time acquire nutrients to keep themselves alive.
In this bacteria–pulp clash, the latter invariably is “defeated” and becomes necrotic, so bacteria move forward and “occupy the territory”—that is, they colonize the necrotic tissue.
These events advance through tissue compartments, coalesce, and move toward the apical part of the canal until virtually the entire root canal is necrotic and infected.
At this stage, involved bacteria can be regarded as the early root canal colonizers or pioneer species (play an important role in the initiation of the apical periodontitis disease process, modify the environment, making it conducive to the establishment of other bacterial groups)
General anaesthetics (GAs) are drugs which produce reversible loss of all sensation and consciousness.
The cardinal features of general anaesthesia are:
• Loss of all sensation, especially pain.
• Sleep (unconsciousness) and amnesia
• Immobility and muscle relaxation
• Abolition of somatic and autonomic reflexes.
GA was absent until the mid 1800’s
Original discoverer of GA
-Crawford long, physician from Gerogia(1842),
ETHER ANESTHESIA
. NITROUS OXIDE
- Horace wells(1844)
. GASEOUS ETHER by William T.G. Morton(1846)
. CHLOROFORM introduced by
- James simpson (1847)
METHODS OF ADMINISTRATION OF INHALATIONAL GENERAL ANAESTHETICS
OPEN METHOD: This is a simple method of administering a volatile anaesthetic.
A simple mask covered with six to ten layers of gauze, which does not fit the contour of the face is held on the face and an anaesthetic like ether, or ethyl chloride is poured on it in drops. The anaesthetic vapour, diluted with air, is inhaled through the gap between the mask and the face.
SEMI-OPEN METHOD: This method is similar to open method but the dilution with air is prevented by using either a well-fitting mask like Ogston’s mask or layers of gauze between face and the mask. A small carbon dioxide build-up occurs with this method.
SEMI-CLOSED METHOD: This method allows some rebreathing of the anaesthetic drug with the help of a reservoir but in addition, part of the volume of each succeeding inspiration is a new portion from an anaesthetic mixture. This method involves accumulation and rebreathing of carbon dioxide.
• CLOSED METHOD: This method employs the chemical agent soda lime to absorb the carbon dioxide present in the expired air. It requires the use of a special apparatus but is particularly useful when the anaesthetic agent is potentially explosive
STAGES OF ANAESTHESIA
Guedel, in 1920 outlined the four stages of general anaesthesia :
• Stage I: Stage of analgesia
• Stage II: Stage of delirium
• Stage III: Stage of surgical anaesthesia
• Stage IV: Stage of respiratory paralysis
Inadequate anaesthesia is indicated by:
Signs of ANS overactivity, such as tachycardia, rise of BP, sweating and lacrimation.
Grimacing;
Other muscle activity.
Surgical anaesthesia is indicated by:
Loss of eyelash (lid) reflex
Development of rhythmic respiration.
Deep anaesthesia is suggested by :
Depression of respiration.
Hypotension
Asystole
Temporomandibular joint anatomy and functionDR POOJA
diarthrodial joint
The masticatory system is the functional unit of the body primarily responsible for chewing, speaking and swallowing. Components also play a major role in tasting and breathing.
The system is made up of bones, joints, ligaments, teeth and muscles.
In addition ,there is an intricate neurologic controlling system that regulates and coordinates all these structural components.
The Temporomandibular joint (TMJ) is formed by the articulation between the articular eminence and the anterior part of the glenoid fossa of the squamous part of temporal bone above and the condylar head of the mandible below.
The TMJ contains a fibrous intraarticular disk that is interposed between the articular surface and functions as a shock absorber.
The TMJ is a compound joint that can be classified by anatomic type as well as by function.
Anatomically the TMJ is a diarthrodial joint, which is a discontinuous articulation of two bones permitting freedom of movement that is dictated by associated muscles and limited by ligaments.
It is also a synovial joint, lined on its inner aspect by a synovial membrane, which secretes synovial fluid. The fluid acts as a joint lubricant and supplies the metabolic and nutritional needs of the non-vascularized internal joint structures.
Functionally the TMJ is a compound joint, composed of four articulating surfaces:
articular facets of the temporal bone
articular facets of the mandibular condyle
superior surface of the articular disk
inferior surface of the articular disk.
The articular disk divides the joint into two compartments. The lower compartment permits hinge motion or rotation and hence is termed ginglymoid.
The superior compartment permits sliding (or translatory) movements and is therefore called arthrodial. Hence the temporomandibular joint as a whole can be termed ginglymoarthrodial.
SYNONYMS
Craniomandibular joint/ articulation
Mandibular joint
Bicondylar joint
Modified ball and socket joint
Compound joint
Diarthroidal joint
TEST BANK For Brunner and Suddarth's Textbook of Medical-Surgical Nursing, 14...Donc Test
TEST BANK For Brunner and Suddarth's Textbook of Medical-Surgical Nursing, 14th Edition (Hinkle, 2017) Verified Chapter's 1 - 73 Complete.pdf
TEST BANK For Brunner and Suddarth's Textbook of Medical-Surgical Nursing, 14th Edition (Hinkle, 2017) Verified Chapter's 1 - 73 Complete.pdf
TEST BANK For Brunner and Suddarth's Textbook of Medical-Surgical Nursing, 14th Edition (Hinkle, 2017) Verified Chapter's 1 - 73 Complete.pdf
PGx Analysis in VarSeq: A User’s PerspectiveGolden Helix
Since our release of the PGx capabilities in VarSeq, we’ve had a few months to gather some insights from various use cases. Some users approach PGx workflows by means of array genotyping or what seems to be a growing trend of adding the star allele calling to the existing NGS pipeline for whole genome data. Luckily, both approaches are supported with the VarSeq software platform. The genotyping method being used will also dictate what the scope of the tertiary analysis will be. For example, are your PGx reports a standalone pipeline or would your lab’s goal be to handle a dual-purpose workflow and report on PGx + Diagnostic findings.
The purpose of this webcast is to:
Discuss and demonstrate the approaches with array and NGS genotyping methods for star allele calling to prep for downstream analysis.
Following genotyping, explore alternative tertiary workflow concepts in VarSeq to handle PGx reporting.
Moreover, we will include insights users will need to consider when validating their PGx workflow for all possible star alleles and options you have for automating your PGx analysis for large number of samples. Please join us for a session dedicated to the application of star allele genotyping and subsequent PGx workflows in our VarSeq software.
Giloy in Ayurveda - Classical Categorization and SynonymsPlanet Ayurveda
Giloy, also known as Guduchi or Amrita in classical Ayurvedic texts, is a revered herb renowned for its myriad health benefits. It is categorized as a Rasayana, meaning it has rejuvenating properties that enhance vitality and longevity. Giloy is celebrated for its ability to boost the immune system, detoxify the body, and promote overall wellness. Its anti-inflammatory, antipyretic, and antioxidant properties make it a staple in managing conditions like fever, diabetes, and stress. The versatility and efficacy of Giloy in supporting health naturally highlight its importance in Ayurveda. At Planet Ayurveda, we provide a comprehensive range of health services and 100% herbal supplements that harness the power of natural ingredients like Giloy. Our products are globally available and affordable, ensuring that everyone can benefit from the ancient wisdom of Ayurveda. If you or your loved ones are dealing with health issues, contact Planet Ayurveda at 01725214040 to book an online video consultation with our professional doctors. Let us help you achieve optimal health and wellness naturally.
Nano-gold for Cancer Therapy chemistry investigatory projectSIVAVINAYAKPK
chemistry investigatory project
The development of nanogold-based cancer therapy could revolutionize oncology by providing a more targeted, less invasive treatment option. This project contributes to the growing body of research aimed at harnessing nanotechnology for medical applications, paving the way for future clinical trials and potential commercial applications.
Cancer remains one of the leading causes of death worldwide, prompting the need for innovative treatment methods. Nanotechnology offers promising new approaches, including the use of gold nanoparticles (nanogold) for targeted cancer therapy. Nanogold particles possess unique physical and chemical properties that make them suitable for drug delivery, imaging, and photothermal therapy.
Spontaneous Bacterial Peritonitis - Pathogenesis , Clinical Features & Manage...Jim Jacob Roy
In this presentation , SBP ( spontaneous bacterial peritonitis ) , which is a common complication in patients with cirrhosis and ascites is described in detail.
The reference for this presentation is Sleisenger and Fordtran's Gastrointestinal and Liver Disease Textbook ( 11th edition ).
Storyboard on Skin- Innovative Learning (M-pharm) 2nd sem. (Cosmetics)MuskanShingari
Skin is the largest organ of the human body, serving crucial functions that include protection, sensation, regulation, and synthesis. Structurally, it consists of three main layers: the epidermis, dermis, and hypodermis (subcutaneous layer).
1. **Epidermis**: The outermost layer primarily composed of epithelial cells called keratinocytes. It provides a protective barrier against environmental factors, pathogens, and UV radiation.
2. **Dermis**: Located beneath the epidermis, the dermis contains connective tissue, blood vessels, hair follicles, and sweat glands. It plays a vital role in supporting and nourishing the epidermis, regulating body temperature, and housing sensory receptors for touch, pressure, temperature, and pain.
3. **Hypodermis**: Also known as the subcutaneous layer, it consists of fat and connective tissue that anchors the skin to underlying structures like muscles and bones. It provides insulation, cushioning, and energy storage.
Skin performs essential functions such as regulating body temperature through sweat production and blood flow control, synthesizing vitamin D when exposed to sunlight, and serving as a sensory interface with the external environment.
Maintaining skin health is crucial for overall well-being, involving proper hygiene, hydration, protection from sun exposure, and avoiding harmful substances. Skin conditions and diseases range from minor irritations to chronic disorders, emphasizing the importance of regular care and medical attention when needed.
- Video recording of this lecture in English language: https://youtu.be/RvdYsTzgQq8
- Video recording of this lecture in Arabic language: https://youtu.be/ECILGWtgZko
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
Selective alpha1 blockers are Prazosin, Terazosin, Doxazosin, Tamsulosin and Silodosin majorly used to treat BPH, also hypertension, PTSD, Raynaud's phenomenon, CHF
The biomechanics of running involves the study of the mechanical principles underlying running movements. It includes the analysis of the running gait cycle, which consists of the stance phase (foot contact to push-off) and the swing phase (foot lift-off to next contact). Key aspects include kinematics (joint angles and movements, stride length and frequency) and kinetics (forces involved in running, including ground reaction and muscle forces). Understanding these factors helps in improving running performance, optimizing technique, and preventing injuries.
Osvaldo Bernardo Muchanga-GASTROINTESTINAL INFECTIONS AND GASTRITIS-2024.pdfOsvaldo Bernardo Muchanga
GASTROINTESTINAL INFECTIONS AND GASTRITIS
Osvaldo Bernardo Muchanga
Gastrointestinal Infections
GASTROINTESTINAL INFECTIONS result from the ingestion of pathogens that cause infections at the level of this tract, generally being transmitted by food, water and hands contaminated by microorganisms such as E. coli, Salmonella, Shigella, Vibrio cholerae, Campylobacter, Staphylococcus, Rotavirus among others that are generally contained in feces, thus configuring a FECAL-ORAL type of transmission.
Among the factors that lead to the occurrence of gastrointestinal infections are the hygienic and sanitary deficiencies that characterize our markets and other places where raw or cooked food is sold, poor environmental sanitation in communities, deficiencies in water treatment (or in the process of its plumbing), risky hygienic-sanitary habits (not washing hands after major and/or minor needs), among others.
These are generally consequences (signs and symptoms) resulting from gastrointestinal infections: diarrhea, vomiting, fever and malaise, among others.
The treatment consists of replacing lost liquids and electrolytes (drinking drinking water and other recommended liquids, including consumption of juicy fruits such as papayas, apples, pears, among others that contain water in their composition).
To prevent this, it is necessary to promote health education, improve the hygienic-sanitary conditions of markets and communities in general as a way of promoting, preserving and prolonging PUBLIC HEALTH.
Gastritis and Gastric Health
Gastric Health is one of the most relevant concerns in human health, with gastrointestinal infections being among the main illnesses that affect humans.
Among gastric problems, we have GASTRITIS AND GASTRIC ULCERS as the main public health problems. Gastritis and gastric ulcers normally result from inflammation and corrosion of the walls of the stomach (gastric mucosa) and are generally associated (caused) by the bacterium Helicobacter pylor, which, according to the literature, this bacterium settles on these walls (of the stomach) and starts to release urease that ends up altering the normal pH of the stomach (acid), which leads to inflammation and corrosion of the mucous membranes and consequent gastritis or ulcers, respectively.
In addition to bacterial infections, gastritis and gastric ulcers are associated with several factors, with emphasis on prolonged fasting, chemical substances including drugs, alcohol, foods with strong seasonings including chilli, which ends up causing inflammation of the stomach walls and/or corrosion. of the same, resulting in the appearance of wounds and consequent gastritis or ulcers, respectively.
Among patients with gastritis and/or ulcers, one of the dilemmas is associated with the foods to consume in order to minimize the sensation of pain and discomfort.
Storyboard on Acne-Innovative Learning-M. pharm. (2nd sem.) CosmeticsMuskanShingari
Acne is a common skin condition that occurs when hair follicles become clogged with oil and dead skin cells. It typically manifests as pimples, blackheads, or whiteheads, often on the face, chest, shoulders, or back. Acne can range from mild to severe and may cause emotional distress and scarring in some cases.
**Causes:**
1. **Excess Oil Production:** Hormonal changes during adolescence or certain times in adulthood can increase sebum (oil) production, leading to clogged pores.
2. **Clogged Pores:** When dead skin cells and oil block hair follicles, bacteria (usually Propionibacterium acnes) can thrive, causing inflammation and acne lesions.
3. **Hormonal Factors:** Fluctuations in hormone levels, such as during puberty, menstrual cycles, pregnancy, or certain medical conditions, can contribute to acne.
4. **Genetics:** A family history of acne can increase the likelihood of developing the condition.
**Types of Acne:**
- **Whiteheads:** Closed plugged pores.
- **Blackheads:** Open plugged pores with a dark surface.
- **Papules:** Small red, tender bumps.
- **Pustules:** Pimples with pus at their tips.
- **Nodules:** Large, solid, painful lumps beneath the surface.
- **Cysts:** Painful, pus-filled lumps beneath the surface that can cause scarring.
**Treatment:**
Treatment depends on the severity and type of acne but may include:
- **Topical Treatments:** Such as benzoyl peroxide, salicylic acid, or retinoids to reduce bacteria and unclog pores.
- **Oral Medications:** Antibiotics or oral contraceptives for hormonal acne.
- **Procedures:** Such as chemical peels, extraction of comedones, or light therapy for more severe cases.
**Prevention and Management:**
- **Cleanse:** Regularly wash skin with a gentle cleanser.
- **Moisturize:** Use non-comedogenic moisturizers to keep skin hydrated without clogging pores.
- **Avoid Irritants:** Such as harsh cosmetics or excessive scrubbing.
- **Sun Protection:** Use sunscreen to prevent exacerbation of acne scars and inflammation.
Acne treatment can take time, and consistency in skincare routines and treatments is crucial. Consulting a dermatologist can help tailor a treatment plan that suits individual needs and reduces the risk of scarring or long-term skin damage.
STUDIES IN SUPPORT OF SPECIAL POPULATIONS: GERIATRICS E7shruti jagirdar
Unit 4: MRA 103T Regulatory affairs
This guideline is directed principally toward new Molecular Entities that are
likely to have significant use in the elderly, either because the disease intended
to be treated is characteristically a disease of aging ( e.g., Alzheimer's disease) or
because the population to be treated is known to include substantial numbers of
geriatric patients (e.g., hypertension).
3. DEFINITION
The term mucous membrane is used to describe the moist lining of the
gastrointestinal tract, nasal passages, and other body cavities that communicate
with the exterior. In the oral cavity this lining is referred to as the oral mucous
membrane, or oral mucosa. At the lips the oral mucosa is continuous with the
skin; at the pharynx the oral mucosa is continuous with the mucosa lining the
rest of the gut. Thus the oral mucosa is located anatomically between skin
and gastrointestinal mucosa and shows some of the properties of each.
Page No-260,Orbans Oral Histology & Embryology.13/E
4. CLASSIFICATION
The classification based on these functional
criteria, divides the oral mucosa into three
major types:
1. Masticatory mucosa 25% (gingiva and
hard palate)
2. Lining or reflecting mucosa 60% (lip,
cheek, vestibular fornix, alveolar mucosa,
floor of mouth and soft palate)
3. Specialized mucosa 10% (dorsum of the
tongue and taste buds)
Page No-260,Orbans Oral Histology & Embryology.13/E
5. Based on keratinization:
KERATINIZED MUCOSA—
MASTICATORY MUCOSA
VERMILLION BORDER OF LIPS
NON KERATINIZED MUCOSA–
LINING MUCOSA
SPECIALIZED MUCOSA
6. DEVELOPMENT OF ORAL MUCOSA
The epithelium of the oral cavity is derived from both the ectoderm and the endoderm.
The anterior part of the oral cavity is lined by the epithelium derived from the ectoderm.
By 13–20 weeks differences between keratinized and nonkeratinized mucosa becomes
apparent. Keratohyaline granules in the keratinized mucosa and region specific cytokeratin
appear.
Lingual papillae appear early at about 7th week; the circumvallate and foliate papillae appear
earlier than filiform papillae, which can be recognized by 10–12 weeks.
Page No-301,Orbans Oral Histology & Embryology.13/E
7. FUNCTIONS OF ORAL MUCOSA
DEFENSE
1.Effective barrier for the entry of the microorganisms.
2.The oral mucosa is impermeable to bacterial toxins. It also secretes antibodies
and has an efficient humoral and cell mediated immunity.
Page No-260,Orbans Oral Histology & Embryology.13/E
8. LUBRICATION
The secretion of salivary glands keeps the oral cavity moist and thus prevents
the mucosa from drying and cracking thereby ensuring an intact oral
epithelium.
A moist oral cavity helps in speech, mastication, swallowing and in the
perception of taste.
Page No-260,Orbans Oral Histology & Embryology.13/E
9. SENSORY
The oral mucosa is sensitive to touch, pressure, pain and temperature.
The sensation of taste is a unique sensation, felt only in the anterior 2/3rd
of the dorsum of the tongue.
Swallowing, gagging, retching and salivating reflexes are initiated by
receptors in the oral mucosa.
Touch sensations in the soft palate results in gag reflex.
Page No-260,Orbans Oral Histology & Embryology.13/E
10. PROTECTION
• The oral mucosa protects the deeper tissues from
mechanical forces resulting from mastication and from
abrasive nature of foodstuffs.
Page No-260,Orbans Oral Histology & Embryology.13/E
11. STRUCTURE OF ORAL MUCOSA
1.EPITHELIUM
2.LAMINA PROPRIA
3.SUBMUCOSA
Page No-261,Orbans Oral Histology & Embryology.13/E
12. EPITHELIUM
• The epithelium of the oral mucous membrane is of the stratified squamous
variety. It may be keratinized (orthokeratinized or parakeratinized) or
nonkeratinized, depending on location.
Page No-264,Orbans Oral Histology & Embryology.13/E
In orthokeratinization, nuclei is lost in
keratinized surface layer.
In parakeratinization, the cells retain
pyknotic and condensed nuclei and
other partially lysed cell organelles until
they desquamate.
13. Page No-260,Orbans Oral Histology & Embryology.13/E
Interphase of epithelium and lamina
propria:
Epithelium form projections called
epithelium ridges and connective tissue
extentions called papilla.
Ridges fit well with the papilla and has a
corrugated appearance called serpentine
appearance.
Interlocking arrangement increases the
area of contact between lamina propria and
epithelium. Also, facilitates exchange of
material between epithelium and blood
vessels in C.T.
14. BASEMENT MEMBRANE
Under light microscopy-- The interface
between the connective tissue and the
epithelium called basament membrane,
appears thick and it includes the reticular
fibers.
It is a zone that is 1 to 4 μ m wide .
This zone stains positively with the
periodic acid-Schiff method, indicating that it
contains neutral mucopolysaccharides.
Page No-260,Orbans Oral Histology & Embryology.13/E
15. • Under Electron Microscope-- It is called Basal
Lamina.
Ultrastructural level consists of zones:
• LAMINA LUCIDA: clear zone, 20-40nm wide
glycoprotein layer, Contain type 4 collagen and
laminin.
• LAMINA DENSA: Dark zone,type 4 collegen coated
with heparan sulfate in chicken wire (net like)
confriguration. ANCHORING FIBERS consisting of
collagen type 7,forms loops and insert into lamina
densa and forms flexible attachment between the
basal lamina and subjacent C.T.
Page 293, tencate
16. LAMINA PROPRIA
Page No-260,Orbans Oral Histology & Embryology.13/E, page293, tencate
- Connective tissue that supports epithelium.
- Consists of blood vessels, nerve, fibers
embedded in amorphous ground substance.
- type 1 and 3 collagen fibers
- cells- fibroblast, macrophages, mast cells etc.
17. PAPILLARY LAYER
-Superficial layer,between the
epithelial ridges and the
reticular portion is below it.
-collegen fibers are thin and loosely
arranged.
RETICULAR LAYER
-Collegen fibers are thicker bundles that lie
parallel to the surface plane. The reticular
layer was thought to contain fine immature
argyrophilic (silver staining) reticular fibers.
The reticular layer contains netlike
arrangement of collagen fibers.
18. SUBMUCOSA
The submucosa consists of connective
tissue of varying thickness and density.
It attaches the epithelium and lamina
propria to the underlying structures.
Whether this attachment is loose or firm
depends on the character of the
submucosa.
Glands, blood vessels, nerves , adipose
tissue +nt.
Page No-260,Orbans Oral Histology & Embryology.13/E
21. STRATUM BASALE
The basal layer is low cuboidal cells
made up of single layer that
synthesize DNA and undergo
mitosis.
New cells are generated in the
basal layer.
The basal cell and the para basal
cells together called STRATUM
GERMINATIVAM, but only Basal
cell can divide.
Page No-268,Orbans Oral Histology & Embryology.13/E
22. Basal cells are made up
of 2 population:
Serrated: low cuboidal,
numerous protoplasmic
processes,heavily
packed with
tonofilament.
Non Serrated:
slow type: protect the
genetic information
Fast type: increases the
Mitotic figures
Microfilaments
RER
23. STRATUM SPINOSUM
The spinous cells which make up this
layer are irregularly polyhedral and
larger than the basal cells.
On the basis of light microscopy, it
appears that the cells are joined by
“intercellular bridges.
Page No-268,Orbans, tencate
24. electron microscopy, show that intercellular bridges are Desmosomes And
Tonofibrils( bundle of tonofilaments)
Tonofilament Network and desmosomes appear To make up the tensile
support stucture of the epithelium.
The spiny appearance of Spinous layer Is due to the shrinkage of cells during
tissue preparations causing them to seprate at points Where desmosomes
don’t attach them.
It resembles the COCKLEBUR OR POSTAL STICKER appearance
25. STRATUM GRANULOSUM
This layer contains flatter and wider cells.
These cells are larger than the spinous cells.
This layer is named for the basophilic
keratohyalin granules that it contains.
The nuclei show signs of degeneration and
pyknosis. This layer still synthesizes protein,
but reports of synthesis rates at this level
differ.
Page No-303,Tencate’s
26. • Odland bodies are lamellated structure made up of glycoproteins.
• Present near cell membrane.
• OD Bodies secrete glycolipid into intercellular space - impermeable
cellmembrane is formedThicking of the cells of the st.granulosum
cross linking of proteinCalcium depostion cell death occurs
Thickened keratin layer Is layed down.
KERATINOSOMES/ ODLAND BODIES/ MEMBRANE COATING GRANULES forms in
the upper Spinous and granular layer.
In keratinized: these are enlongated and lamellar.
In non keratinized: circular and amorphous.
27. STRATUM CORNEUM
The stratum corneum is made up of
keratinized squamae, which are larger and
flatter than the granular cells.
Thickness of stratum corneum varies at
different sites in the oral cavity and is
thicker than most areas of the skin.
Here all of the nuclei and other organelles
such as ribosomes and mitochondria have
disappeared.
Page No-303,Tencate’s
28. NON KERATINIZED EPITHELIUM
• In nonkeratinized oral epithelium the events taking place in the upper cell layers are far less
dramatic than those in keratinized epithelium.
Page No-306,Tencate’s 8th Edition , page,225 orbans
• Different layers :
• Stratum basale: cells are simillar to that of
keratinized epithelium.
• Stratum intermedium: have larger cells than
spinosum, also the intercellular spaces are not that
distended hence the cells donot have prickly
appreance.
• Stratum Superficale: clntain nucleated cells. Contain
less amount of tonofilaments and lack keratohyline
29. KERATINOCYTES
These are epidermal/epithelial cell that synthesizes keratin and its characteristic
intermediate filament protein is cytokeratin.
Keratinocytes increase in volume in each successive layer from basal to superficial. The
cells of each successive layer cover a larger area than do the cells of the layers.
Page No-274,Orbans Oral Histology & Embryology.13/E
NON-KERATINOCYTES
The epithelium contains a smaller population of cells that do not possess cytokeratin
filaments, hence they do not have the ability to keratinize.
Do not show mitotic activity, undergo maturative changes or desquamate. They are not
arranged in layers and do not form desmosomal attachments with adjacent keratinocytes.
32. The epithelium of lining mucosa can attain a larger thickness than
that of masticatory mucosa, sometimes exceeding 500 µm in the
cheek, and is nonkeratinized.
The surface is thus flexible and able to withstand stretching.
The lamina propria is generally thicker than in masticatory mucosa
and contains fewer collagen fibers.
Page No-270,Orbans Oral Histology & Embryology.13/E
LINING MUCOSA
33. LINING MUCOSA
Labial and buccal
mucosa
Very thick, nonkeratinized,
stratified squamous
Epithelium.
Long, slender papillae;
dense
fibrous connective tissue
containing collagen and
some
elastic fibers; rich vascular
supply giving off
anastomosing
capillary loops into papillae
Mucosa firmly attached to
underlying
muscle by collagen and
elastin;
dense collagenous
connective tissue
with fat, minor salivary
glands,
sometimes sebaceous
glands
Page No-310,Tencate’s
EPITHELIUM LAMINA PROPRIA SUB MUCOSA
34. REGION COVERING
EPITHELIUM
LAMINA PROPRIA SUBMUCOSA
Alveolar mucosa Thin, nonkeratinized,
stratified
squamous epithelium
Short papillae,
connective
tissue containing many
elastic
fibers; capillary loops
close to
the surface supplied by
vessels running
superficially
to the periosteum
Loose connective tissue,
containing
thick elastic fibers
attaching it to
periosteum of alveolar
process;
minor salivary glands.
Page No-310,Tencate’s oral histology ,Development,structure &function.8th Edition
35. REGION COVERING EPITHELIUM LAMINA PROPRIA SUBMUCOSA
Ventral surface of
tongue
Thin, nonkeratinized,
stratified
squamous epithelium.
Thin with numerous short
papillae and some elastic
fibers; a few minor salivary
glands; capillary network
in sub papillary layer;
reticular layer relatively
avascular.
Thin and irregular; may
contain fat and
small vessels; where
absent, mucosa
is bound to connective
tissue
surrounding tongue
musculature.
Page No-310,Tencate’s
36. REGION COVERING EPITHELIUM LAMINA PROPRIA SUBMUCOSA
Floor of mouth Very thin, nonkeratinized,
stratified squamous
Epithelium.
Short papillae; some
elastic fibers; extensive
vascular
supply with short
anastomosing capillary
loops.
Loose fibrous connective
tissue
containing fat and minor
salivary
glands.
Page No-306,Tencate’s
37. REGION COVERING EPITHELIUM LAMINA PROPRIA SUBMUCOSA
Lining Mucosa
Soft palate Thin, nonkeratinized
stratified squamous
epithelium;
Thick with numerous short
papillae; elastic fibers
forming
on elastic lamina; highly
vascular with well-defined
capillary network.
Diffuse tissue containing
numerous
minor salivary glands
taste
buds present.
Page No-310,Tencate’s
38. Specialized Mucosa
Dorsal surface of
tongue
Thick, keratinized and
nonkeratinized, stratified
squamous epithelium
forming
three types of lingual
papillae, some bearing
taste
buds
Long papillae; minor
salivary
glands in posterior portion;
rich innervation especially
near taste buds; capillary
plexus in papillary layer;
large
vessels lying deeper
No distinct layer; mucosa
is bound to
connective tissue
surrounding
musculature of tongue
Page No-310,Tencate’s
SPECIALIZED MUCOSA
39. Different papillae-
FILIFORM PAPILLAE- Most numerous ,
cone shaped,+nt on dorsum of tongue,
keretanized epithelium, no taste buds +nt.
FUNGIFORM PAPILLAE- appear as red
prominence on tongue, rich capillary
network inside, 1-3 taste buds +nt.
Tencate’s
40. • VALLATE PAPILLAE- 8-10 in no, +nt in front
of sulcus terminalis, deep circular groove into
which open the ducts of von ebners salivary
gland( contain salivary lipase enzyme), contain
taste buds.
• FOLIATE PAPILLAE- leaflike, taste buds +nt.
41. TASTE BUDS
Taste buds are small ovoid or barrel-shaped intraepithelial
organs about 80 μ m high and 40 μ m thick.
Their outer surface is almost covered by a few flat epithelial
cells, which surround a small opening, the taste pore. It leads
into a narrow space lined by the supporting cells of the taste
bud. The outer supporting cells are arranged like the staves of a
barrel.
The inner and shorter ones are spindle shaped. Between the
latter are arranged 10 to 12 neuroepithelial cells, the receptors
of taste stimuli.
42.
43. VALLA
TE
FUNGIFOR
M
FOLIAT
E
FUNGIFOR
M
• NERVE SUPPLY OF TONGUE
• Sensory:
ant 2/3 – lingual branch of trigeminal nerve
post 1/3- glossopharyngeal nerve
• Taste senation:
Ant2/3 – chorda tympani branch of facial nerve.
Post-1/3- glossophangeal nerve.
• Motor senstation:
hypoglossal nerve except palatoglossus which
is supplied by vagus nerve.
TASTE
SENSATION
44. MASTICATORY MUCOSA
It covers hard palate and gingiva that are exposed to compressive
and shear forces and to abrasion during the mastication of food.
The epithelium of masticatory mucosa is moderately thick and
frequently is orthokeratinized, although normally parakeratinized
areas of the gingiva and occasionally of the palate do occur.
Page No-279,Orbans Oral Histology & Embryology.13/E
45. Hard palate Thick, orthokeratinized
(often
parakeratinized in parts),
stratified squamous
epithelium thrown into
transverse palatine ridges
(rugae)
Long papillae; thick, dense
collagenous tissue,
especially
under rugae; moderate
vascular supply with short
capillary loops.
Dense collagenous
connective tissue
attaching mucosa to
periosteum
(mucoperiosteum); fat and
minor salivary glands are
packed into connective
tissue in regions where
mucosa overlies lateral
palatine
neurovascular bundles.
Page No-310,Tencate’s oral histology ,Development,structure &function.8th Edition
MASTICATORY MUCOSA
EPITHELIUM LAMINA PROPRIA SUB MUCOSA
46. REGION COVERING
EPITHELIUM
LAMINA PROPRIA SUBMUCOSA
Gingiva Thick, orthokeratinized or
parakeratinized, stratified
squamous epithelium
often
showing stippled surface
Long, narrow papillae;
dense collagenous
connective tissue;
not highly vascular but
has
long capillary loops with
numerous anastomoses
No distinct layer; mucosa
firmly
attached by collagen
fibers to
cementum and
periosteum of
alveolar process
(mucoperiosteum)
Page No-310,Tencate’s oral histology ,Development,structure &function.8th Edition
47. GINGIVA
• The gingiva eXtends from the dentogingival junction to the alveolar mucosa.
• It can be orthokeratinized (15%) , parakertinized(75%), nonkeratinized (10%)
• Can be divided into:
50. VERMILLION BORDER OF LIP
• The trasitional zone between
the skin and the lip. Found
only in humans.
51. GINGIVAL SULCUS AND
DENTOGINGIVAL JUNCTION
• Gingival sulcus: it’s a narrow space between inner
aspect of gingiva and the tooth.
• It is V-shaped.
• The sulcus extends from the free gingival margin to
dentogingival junction.
• Sulcular epithelium is non keratinized, lacks
epithelium ridges , forms a smooth interface with
lamina propria, depth of gingival sulcus is 0.5 to
1.8mm ( ~2mm).
• It Acts as semi permeable membrane.
Page 240, tencate
52. DENTOGINGIVAL JUNCTION
• Junction between the gingiva and the tooth.
• Epithelium which gets attached to tooth called
JUNCTIONAL or ATTACHMENT EPITHELIUM.
• Juctional epithelium is collar like St. Sq. Non kerat.
Epithelium.
• Length- 0.25 to 1.35mm, hight turnover rate 5-6days.
• It is permeable, heavily infiltrated by NEUTROPHIL
CELLS
• It is 3-4 layer thick in early life, But no. Of layer
increases with age to 10-20 layers.
• JE tapers from its coronal end which may be 10-29
cells Wide to 1-2 cells wide at its Apical termination.
Page 241 orbans
53. JE formed by the confluence of the Oral
epithelium and the Reduced enamel
epithelium (REE ) during tooth eruption.
• JE attached to the tooth surface by the
Means of INTERNAL BASAL LAMINA and
attached to the Gingival C.T by EXTERNAL
BASAL LAMINA.
• Attachment of JE is reinforced by Gingival
fibers, Which brace the marginal gingiva
against the tooth surface and for this reason
the JE and Gingival fibers Are considerd as
a functional unit Called DENTOGINGIVAL
UNIT. Page 241, orbans
54. DEVELOPMENT OF DGJ
REE covers the
entire surface of
Enamel, extending to
CEJ.
During eruption, tip of th tooth
approaches the oral mucosa,,
REE and oral epithelium meet
and fuses.
Epithelium the covers the tip of crown
degenrates in its center, tooth emerges out
into oral cavity.
REE remains organically attached to the part
of enamel that has not yet erupted.
Once tip of crown emerged, REE termed as
A shallow groove (gingival
sulcus) may develop
between gingiva and
surface of tooth
Page 242, orbans
55. SHIFT OF DGJ
• Active eruption is actual movement of tooth towards occlusal plane.
• Once reached to the occlusal plane, sepration of PAE from tooth called Passive eruption.
REE
Tooth erupts in oral
cavity
PAE
GINGIVAL EPITHELIUM
Attaches. gingiva to tooth,
also called as
SECONDARY ATTACHMENT
EPITHELIUM
Gradually, REE is lost
A
57. AGE CHANGES
With age the oral mucosa becomes smooth and dry.
These are due to epithelium becoming thin mainly due to the reduction in the
thickness of epithelial ridges and decrease in the salivary secretion.
The filiform papilla becomes reduced and the tongue appears smooth owing to
the reduction in the thickness of the epithelium.
Nutritional deficiencies may also be a contributing factor for this change. Varicose
veins on the ventral aspect of tongue are often seen and these are termed as
lingual varices.
Langerhans cells include a progressive loss of sensitivity to thermal, chemical and
mechanical stimuli, and with decline in taste perception.
Page No-302,Orbans Oral Histology & Embryology.13/E
59. FORDYCES GRANULES
Fordyce’s granules appear as small yellow spots, either discretely separated or
forming relatively large plaques, often projecting slightly above the surface of the
tissue.
• They are found most frequently in a bilaterally
symmetrical pattern on the mucosa of the cheeks
opposite the molar teeth but also occur on the inner
surfaces of the lips, in the retromolar region lateral to
the anterior faucial pillar, and occasionally on the
tongue, gingiva, frenum, and palate.
Page 127,
60. TREATMENT
• These glands are innocuous, have no clinical or functional significance, and
require no treatment. However, very rarely a benign sebaceous gland
adenoma may develop from these intraoral structures, such as in the case
involving the buccal mucosa.
Page No-127,Shafer’s Textbook of Oral Pathology.7th edition.
61. FOCAL EPITHELIAL HYPERPLASIA
(HECK’S DISEASE)
One of the most contagious of the oral papillary lesions is focal epithelial
hyperplasia.
It is also known as Heck’s disease or multifocal papilloma is a rare benign
lesion of the oral mucosa produced by the subtypes 13 or 32 of human
papillomavirus.
Page No-128,Shafer’s Textbook of Oral Pathology.7th edition.
62. CLINICAL FEATURES
Primarily occurs in children, but lesions may occur
in young and middle-aged adults.
Hyperplastic lesions are small (0.3–1.0
cm),discrete, and well-demarcated, but they
frequently cluster so closely together that the
entire mucosal area takes on a cobblestone or
fissured appearance.
Page No-128,Shafer’s Textbook of Oral Pathology.7th edition.
63. TREATMENT
Conservative excisional biopsy may be required to establish the proper
diagnosis, but additional treatment is unnecessary, except perhaps for
esthetic reasons relating to visible labial lesions. Spontaneous regression
has been reported after months or years, and the disease is rather rare in
adults.
Page No-128,Shafer’s Textbook of Oral Pathology.7th edition.
65. RED AND WHITE TISSUE
REACTIONS
INFECTIOUS DISEASE
Oral Candidiasis
Hairy Leukoplakia
PREMALIGNANT LESION
Oral Leukoplakia and Erythroplakia
Oral Submucous Fibrosis.
IMMUNOPATHOLOGIC DISEASES
Oral Lichen Planus
Drug-Induced Lichenoid Reactions
Lichenoid Reactions of Graft- versus-Host
Disease
Lupus Erythematosus
ALLERGIC REACTIONS
Lichenoid Contact Reactions
Reactions to Dentifrice and
Chlorhexidine
TOXIC REACTIONS
Reactions to Smokeless Tobacco
Smoker’s Palate
REACTIONS TO MECHANICAL
TRAUMA
Morsicatio
OTHER RED AND WHITE
LESIONS
Benign Migratory Glossitis)
Leukoedema
White Sponge Nevus
Hairy Tongue
CLASSIFICATION
Page no-92,Burket’s Oral Medicine,11th edition.
66. ORAL CANDIDIASIS
PREDISPOSING FACTORS
Denture wearing
Smoking
Atopic constitution
Inhalation steroids
Topical steroids
Imbalance of oral microflora
Quantity and quality of saliva
Immunosuppressive disease
Chemotherapy
Endocrine deficiency
ETIOLOGY
C. albicans,
C.tropicalis, and
C.glabrata comprise
together over 80% of
the species isolated
from human Candida
infections.
Page no-93,Burket’s Oral Medicine,11th edition.
69. TREATMENT
Identify any predisposing factor.
Polyenes such as nystatin and amphotericin B are the first alternatives in
treatment of primary oral candidiasis and are well tolerated.
Topical treatment with azoles such as miconazole is the treatment of
choice in angular cheilitis often infected by both S. aureus and Candida.
Systemic azoles may be used for deeply seated primary candidiasis,
such as as chronic hyperplastic candidiasis, denture stomatitis, and
median rhomboid glossitis .
Page no-96,Burket’s Oral Medicine,11th edition.
70. LEUKOEDEMA
Leukoedema is an abnormality of the buccal
mucosa which clinically resembles early
leukoplakia, but appears to differ from it in
certain respects.
Wood & Goaz.Differential diagnosis of oral &maxillofacial lesions.5/Edition
71. CLINICAL FEATURES
• The gross appearance varies from a filmy opalescence of the mucosa in the early
stages to a more definite greyish-white cast with a coarsely wrinkled surface in the
later stages.
• Lesions occur bilaterally in the majority of cases and frequently involve most of
the buccal mucosa, extending onto the oral surface of the lips.
• Most noticeable along the occlusal line in the bicuspid and molar region.
Wood & Goaz.Differential diagnosis of oral &maxillofacial lesions.5/Edition
72. LEUKOPLAKIA
(LEUKOKERATOSIS)
The World Health Organization defined leukoplakia as "a white patch or
plaque that cannot be characterized clinically or pathologically as any
other diseases as with other keratotic lesions, it cannot be scraped off with
a tongue blade.
Shafer’s Textbook of Oral Pathology.7th Edition
73. ETIOLOGY
Tobacco products
Ethanol
Hot, cold, spicy, and acidic foods and beverages
Alcoholic mouth rinse
Occlusal trauma
Sharp edges of prostheses or teeth
Actinic radiation
Syphilis
Presence of Candida albicans
Presence of viruses
Wood & Goaz.Differential diagnosis of oral &maxillofacial lesions.5/Edition
74. CLINICAL FEATURES
Leukoplakic lesions are characteristically asymptomatic and are most often discovered during a
routine oral examination.
Frequent sites are the lip vermilion, buccal mucosa, mandibular gingiva, tongue, oral floor,
hard palate, maxillary gingiva, lip mucosa, and soft palate.
The lesions may vary greatly in size, shape, and distribution. The borders may be distinct or
indistinct and smoothly contoured or ragged.
The lesions may be solitary, or multiple plaques may be scattered through the mouth.
Shafer’s Textbook of Oral Pathology.7th Edition
75. CLINICAL TYPES OF LEUKOPLAKIA
Homogeneous type
Speckled type
White and red patches
Verrucous type
Wood & Goaz.Differential diagnosis of oral &maxillofacial lesions.5/Edition
76. TREATMENT
For low-risk lesions, every effort must be made to identify local and chronic
causative irritants. The cause may be obvious from the location of the lesion.
A simple procedure for small lesions is, however a relatively complicated
operation if the lesions are large, involve many surfaces, or are in a surgically
delicate site. A"ridge callus" is an exception and would not require excision in
most cases.
Wood & Goaz.Differential diagnosis of oral &maxillofacial lesions.5/Edition
77. ERYTHROPLAKIA
• The term ‘erythroplakia’ is used analogously to leukoplakia to
designate lesions of the oral mucosa that present as bright red
velvety plaques which cannot be characterized clinically or
pathologically as due to any other condition.
Page 420-Shafers Textbook of oral pathology.7th edition
79. SMOKER’S PALATE
Nicotine stomatitis is a specific type of leukoplakia seen
mostly in men who are pipe smokers.
The etiology is probably more related to the high
temperature rather that the chemical composition of the
smoke, although there is a synergistic effect of the two.
It begins as a reddish stomatitis of the palatal mucosa,
and as the irritation is continued, keratotic changes occur
and the lesion becomes slightly opalescent and finally
white in colour.
Page no-117,Burket’s Oral Medicine,11th edition.
80. ORAL SUBMUCOUS FIBROSIS
It is a chronic disease that affects the oral mucosa as well as the
pharynx and the upper two-thirds of the esophagus. There is
substantial evidence that lends support to a critical role of areca
nuts in the etiology behind submucous fibrosis.
Page no-103,Burket’s Oral Medicine,11th edition
81. The onset is insidious, over a two to five years.
This includes a burning sensation in the mouth when consuming spicy
food, appearance of blisters especially on the palate, ulcerations or
recurrent generalized inflammation of the oral mucosa, excessive
salivation, defective gustatory sensation and dryness of the mouth.
Page no-445,Shafer’s Textbook of Oral Pathology.7th Edition
82. (A) Horizontal fibrosis traversing at the junction of hard
and soft palate. (B)Involvement of pterygomandibular
raphae compounding the difficulty of mouth opening.
Advanced OSF with difficulty in
opening the mouth.
Page no-98,Shafer’s Textbook of Oral Pathology.7th Edition
83. TREATMENT
Nutritional support.- vit A, B complex, c, iron.
Physiotherapy.
Prescription of chewable pellets of hydrocortisone
( 1pellet to be chewed 3,4 hours for 3 to 4 weeks)
Local drug delivery.-0.5ml intralesional inj
HYALURONIDASE 1500IU mixed in 1ml of
LIGNOCAINE/ 0.5ml of HYDROCORTISONE ACETATE
into each buccal mucosa once a week for 4 weeks
or more.
Surgical management. Recommended in
interincisor distance is less than 2 cm.
Multiple Z shaped incisions are made into fibrotic
tissue then sutured in a straighter fashion.
PAGE No-446.Shafer’s Textbook of Oral Pathology.7th Edition
84. GEOGRAPHIC TONGUE
Annular lesion affecting the dorsum and margin of
the tongue.
Geographic tongue is circumferentially migrating and
leaves an erythematous area behind, reflecting
atrophy of the filiform papillae.
Geographic tongue may regress, but it is not possible
to predict when and to which patient this may happen.
The prevalence of the disease seems to decrease with
age, which supports spontaneous regression over
time.
Page no-119,Burkit Oral Medicine,11th edition.
85. HAIRY TONGUE
Hairy tongue is characterized by an impaired
desquamation of the filiform papilla, which
leads to the hairy-like clinical appearance.
The elongated papillae have to reach lengths in
excess of 3 mm to be classified as “hairy,”
although lengths of more than just 15 mm have
been reported in hairy tongue.
Patients should be informed about the
benign and noncontagious nature of hairy
tongue.
Page no-121,Burkit Oral Medicine,11th edition.
86. CONCLUSION
Oral mucosa lines the oral cavity. It is continuous with skin of the lip through the
vermilion border and with the mucosa of pharynx posteriorly.
Mucosa consists of a stratified squamous epithelium and the connective tissue
called lamina propria. The mucosa is attached to the underlying structure, which is
either bone or muscle, by a loose connective tissue called the submucosa.
The masticatory mucosa is tightly bound to the bone while the lining mucosa is
loosely attached to muscles to allow distention.