The cranial base grows postnatally through processes like cortical drift and remodeling, elongation at synchondroses, and sutural growth. The maxilla and mandible are attached to the growing cranial base and are displaced downward and forward as the cranial base grows. The maxilla also grows through sutural growth and surface remodeling while the mandible grows through remodeling of processes like the ramus, body, angle, lingual tuberosity, alveolar process, chin, condyle, and coronoid process. Growth of the cranial base, maxilla, and mandible continues until late adolescence to accommodate the developing dentition.
This document discusses principles of facial growth and development. It explains that growth of the maxilla occurs through apposition of bone in sutures connecting it to the cranial base and through surface remodeling. Growth of the mandible occurs primarily through remodeling and bone deposition in the ramus, causing the mandible to grow downward and forward. Facial growth can be disrupted by conditions like craniofacial malformations, trauma, or arthritis.
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
Postnatal growth of the skull and jaws _ Dr. Nabil Al-ZubairNabil Al-Zubair
The document discusses postnatal growth of the skull and jaws. It describes several mechanisms of bone growth, including endochondral ossification where bone replaces cartilage, and intramembranous ossification where bone is laid down directly by periosteum. Growth centers in the cranial base include synchondroses like the spheno-occipital synchondrosis. The maxilla enlarges through deposition at the tuberosities and alveolar development. Mandibular growth occurs through condylar growth and alveolar development, with two-thirds of growth complete by age 10. Growth is controlled by genetic and environmental factors.
This document provides an overview of mandibular growth and development from prenatal to postnatal periods. It discusses the anatomy of the mandible and theories around its evolution. The prenatal growth section describes the key stages from fertilization to embryo and fetal development. Mandibular growth mechanisms are explored through a brief history of theories proposed by researchers from the 18th century onwards. Growth progression, sites, and age-related changes in the mandible are examined.
POST NATAL GROWTH AND DEVELOPMENT OF MAXILLA AND MANDIBLEShehnaz Jahangir
The document discusses postnatal growth and development of the maxilla and mandible. It describes how the maxilla grows through displacement, growth at sutures, and surface remodeling, with the maxillary tuberosity, palate, and sinus undergoing specific changes. The mandible grows primarily through remodeling at the condyle, ramus, and alveolar process. Various theories of craniofacial growth are also summarized, along with clinical implications such as cleft lip/palate and space maintenance for orthodontic treatment.
The mandible develops from the first pharyngeal arch. Meckel's cartilage appears around the 6th week as a template for mandibular development. Ossification begins in membrane covering Meckel's cartilage, forming the body of the mandible around the mental and incisive nerves. Endochondral ossification forms the condylar process, mental region, and coronoid process. Postnatally, the mandible undergoes significant growth mediated by genetic and functional factors to accommodate the dentition and masticatory muscles.
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
This document discusses principles of facial growth and development. It explains that growth of the maxilla occurs through apposition of bone in sutures connecting it to the cranial base and through surface remodeling. Growth of the mandible occurs primarily through remodeling and bone deposition in the ramus, causing the mandible to grow downward and forward. Facial growth can be disrupted by conditions like craniofacial malformations, trauma, or arthritis.
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
Postnatal growth of the skull and jaws _ Dr. Nabil Al-ZubairNabil Al-Zubair
The document discusses postnatal growth of the skull and jaws. It describes several mechanisms of bone growth, including endochondral ossification where bone replaces cartilage, and intramembranous ossification where bone is laid down directly by periosteum. Growth centers in the cranial base include synchondroses like the spheno-occipital synchondrosis. The maxilla enlarges through deposition at the tuberosities and alveolar development. Mandibular growth occurs through condylar growth and alveolar development, with two-thirds of growth complete by age 10. Growth is controlled by genetic and environmental factors.
This document provides an overview of mandibular growth and development from prenatal to postnatal periods. It discusses the anatomy of the mandible and theories around its evolution. The prenatal growth section describes the key stages from fertilization to embryo and fetal development. Mandibular growth mechanisms are explored through a brief history of theories proposed by researchers from the 18th century onwards. Growth progression, sites, and age-related changes in the mandible are examined.
POST NATAL GROWTH AND DEVELOPMENT OF MAXILLA AND MANDIBLEShehnaz Jahangir
The document discusses postnatal growth and development of the maxilla and mandible. It describes how the maxilla grows through displacement, growth at sutures, and surface remodeling, with the maxillary tuberosity, palate, and sinus undergoing specific changes. The mandible grows primarily through remodeling at the condyle, ramus, and alveolar process. Various theories of craniofacial growth are also summarized, along with clinical implications such as cleft lip/palate and space maintenance for orthodontic treatment.
The mandible develops from the first pharyngeal arch. Meckel's cartilage appears around the 6th week as a template for mandibular development. Ossification begins in membrane covering Meckel's cartilage, forming the body of the mandible around the mental and incisive nerves. Endochondral ossification forms the condylar process, mental region, and coronoid process. Postnatally, the mandible undergoes significant growth mediated by genetic and functional factors to accommodate the dentition and masticatory muscles.
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
prenatal and post natal growth of mandiblemahesh kumar
The document discusses the prenatal and postnatal development of the mandible. Key points include:
1) The mandible initially develops from Meckel's cartilage during prenatal development and undergoes intramembranous and endochondral ossification.
2) Postnatally, the mandible grows at the condylar cartilage, posterior border of the ramus, and alveolar ridges. Growth occurs through remodeling and apposition of bone.
3) Mandibular growth is influenced by functional matrices like muscles and teeth which cause regional changes through resorption and displacement as the mandible grows in a downward and forward direction like an "expanding V".
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
The document discusses the sites and types of growth in the craniofacial complex. It begins by defining the structures that make up the craniofacial complex, including the cranial vault, floor of the cranium, naso-maxillary complex, and mandible. It then examines the specific sites and types of growth for each structure. For the cranial vault, growth occurs at the sutures and through surface remodeling of the bony plates. The floor of the cranium grows at synchondroses and sutures, as well as through surface remodeling. The maxilla grows through translation downward and forward guided by growth of the cranial base, as well as through sutural growth. The
The document discusses post-natal growth of the maxilla and mandible. It states that the maxilla is attached to the cranial base through sutures and the mandible is attached through the temporomandibular joint. The cranial base grows through three processes: cortical drift and remodeling, elongation of synchondroses, and sutural growth. This affects the placement of the maxilla and mandible. The maxilla grows through processes like primary and secondary displacement, growth at sutures, and surface remodeling involving bone deposition and resorption. Similarly, the mandible grows mainly at the ramus, body, angle, lingual tuberosity, alveolar process, condyle,
This document discusses post-natal growth of the maxilla and mandible. It describes how the maxilla grows through primary and secondary translation at sutures, through surface bone remodeling, and through palatal remodeling which follows the 'V' principle. The mandible grows most during the post-natal period through growth at the condylar cartilage which pushes the mandible downward and forward. Both bones exhibit growth changes with age and can be affected by various developmental anomalies. Understanding their normal and abnormal growth is important for orthodontic diagnosis and treatment planning.
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
Mandible growth pre natal & post natal / /certified fixed orthodontic courses...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.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
00919248678078
The mandible develops through intramembranous and endochondral ossification. Ossification begins around the 6th week in utero near Meckel's cartilage. The body and ramus form through intramembranous ossification spreading from centers of ossification. Secondary cartilages form the condylar process, coronoid process, and mental region which undergo endochondral ossification. Postnatally, the condyle and ramus undergo significant growth through apposition on the lingual surface and resorption on the buccal surface. This drives the mandible downward and forward through childhood and adolescence.
This document provides information on the development of the mandible. It begins with a brief history of mandibular growth studies. It then discusses prenatal development, including the formation of Meckel's cartilage and centers of ossification. Secondary cartilages that form postnatally to influence growth are also described. The document outlines growth patterns in various regions of the mandible, including the condyle, coronoid process, ramus, body, and angle. Clinical implications related to manipulation of condylar growth are mentioned. In summary, the document reviews the embryological development and postnatal growth patterns that shape the mandible.
Growth and development nasomaxillary complex/ dental implant coursesIndian 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
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
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
Growth and development of mandible /certified fixed orthodontic courses by...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.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
00919248678078
Post natal growth of maxilla and mandibleDrArti Sharma
This document discusses postnatal growth of the maxilla and mandible. It defines growth, development, and the different phases of postnatal growth. For the maxilla, it describes the key growth mechanisms including endosteal and periosteal growth, cortical drift, the "V" principle, and counterparts in other structures. Growth occurs primarily in width early, then length, and lastly height. For the mandible, it discusses growth from birth to 1 year involving the ramus, condyle and body, and remodeling that occurs after age 1. Matrix and intramatrix rotation influence mandibular growth. Anomalies that can affect growth are also summarized.
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
The document summarizes the growth and development of the mandible and temporomandibular joint (TMJ) from the 6th week of intrauterine life through adulthood. It describes how the mandible develops from intramembranous and endochondral ossification centers, with secondary cartilages forming the condyle, coronoid process, and mental protuberance between 10-14 weeks. The condylar cartilage is an important growth center, with peak growth occurring during puberty. Associated structures like the teeth and muscles influence the development and remodeling of the mandible. Growth occurs through deposition and resorption at specific sites on the mandible.
The document discusses the development of the mandible from early embryogenesis through postnatal growth. It begins with the formation of Meckel's cartilage from the first pharyngeal arch which later contributes to mandibular formation. Ossification begins around the mental nerve and spreads to form the body and ramus. Secondary cartilage appears including the condylar, coronoid, and symphyseal cartilage. The mandible continues developing after birth through remodeling processes like at the condyle which causes downward and forward growth of the mandible.
Growth and development of mandible in childrenDr. Harsh Shah
a brief idea about the development of mandible for indian students looking for a quick review from dentistry department
all the best to students
Presented by : Harsh SHah
Dept. of Orthodontics
SDDCH PBN
“Growth was concieved by an anatomist, born to a biologist, delivered by a physician, left on a chemist doorstep, and adopted by a physiologist.At an early age- she eloped with a statistician, divorced him for a psycologist, and is now wooed, alternatively and concurrently, by an endrocrinologist, a biochemist,a physicist, a mathematician, an orthodontist, a eugenicist and the children’s bureau”.
THE PRENATAL LIFE IS DIVIDED INTO THREE PERIODS –
1.PERIOD OF THE OVUM
2.PERIOD OF THE EMBRYO
3.PERIOD OF THE FETUS
About the fourth week of intrauterine life, the pharyngeal arches are laid down
The first arch is called the mandibular arch and the second arch the hyoid arch.
The document discusses growth of the craniofacial complex, including the maxilla, mandible, and soft tissues. Growth occurs through bone apposition, remodeling, and endochondral ossification at sutures and synchondrosis. The maxilla grows downward and forward through remodeling and addition of bone in sutures. The mandible grows through remodeling in the ramus, resulting in a downward and forward displacement. Deviations from normal growth can occur due to trauma, disease, or genetic syndromes.
The document summarizes growth patterns in different areas of the skull. It discusses three main types of growth: hypertrophy, hyperplasia, and extracellular secretion. Growth of the cranial vault occurs primarily at sutures through periosteal activity. The cranial base grows through endochondral ossification at synchondroses. The maxilla grows both by displacement from cranial base growth until age 6 and then by sutural growth, with bone remodeling on its surfaces. Mandibular growth involves both endochondral growth at the condyle and periosteal growth along the posterior ramus surface.
prenatal and post natal growth of mandiblemahesh kumar
The document discusses the prenatal and postnatal development of the mandible. Key points include:
1) The mandible initially develops from Meckel's cartilage during prenatal development and undergoes intramembranous and endochondral ossification.
2) Postnatally, the mandible grows at the condylar cartilage, posterior border of the ramus, and alveolar ridges. Growth occurs through remodeling and apposition of bone.
3) Mandibular growth is influenced by functional matrices like muscles and teeth which cause regional changes through resorption and displacement as the mandible grows in a downward and forward direction like an "expanding V".
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
The document discusses the sites and types of growth in the craniofacial complex. It begins by defining the structures that make up the craniofacial complex, including the cranial vault, floor of the cranium, naso-maxillary complex, and mandible. It then examines the specific sites and types of growth for each structure. For the cranial vault, growth occurs at the sutures and through surface remodeling of the bony plates. The floor of the cranium grows at synchondroses and sutures, as well as through surface remodeling. The maxilla grows through translation downward and forward guided by growth of the cranial base, as well as through sutural growth. The
The document discusses post-natal growth of the maxilla and mandible. It states that the maxilla is attached to the cranial base through sutures and the mandible is attached through the temporomandibular joint. The cranial base grows through three processes: cortical drift and remodeling, elongation of synchondroses, and sutural growth. This affects the placement of the maxilla and mandible. The maxilla grows through processes like primary and secondary displacement, growth at sutures, and surface remodeling involving bone deposition and resorption. Similarly, the mandible grows mainly at the ramus, body, angle, lingual tuberosity, alveolar process, condyle,
This document discusses post-natal growth of the maxilla and mandible. It describes how the maxilla grows through primary and secondary translation at sutures, through surface bone remodeling, and through palatal remodeling which follows the 'V' principle. The mandible grows most during the post-natal period through growth at the condylar cartilage which pushes the mandible downward and forward. Both bones exhibit growth changes with age and can be affected by various developmental anomalies. Understanding their normal and abnormal growth is important for orthodontic diagnosis and treatment planning.
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
Mandible growth pre natal & post natal / /certified fixed orthodontic courses...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.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
00919248678078
The mandible develops through intramembranous and endochondral ossification. Ossification begins around the 6th week in utero near Meckel's cartilage. The body and ramus form through intramembranous ossification spreading from centers of ossification. Secondary cartilages form the condylar process, coronoid process, and mental region which undergo endochondral ossification. Postnatally, the condyle and ramus undergo significant growth through apposition on the lingual surface and resorption on the buccal surface. This drives the mandible downward and forward through childhood and adolescence.
This document provides information on the development of the mandible. It begins with a brief history of mandibular growth studies. It then discusses prenatal development, including the formation of Meckel's cartilage and centers of ossification. Secondary cartilages that form postnatally to influence growth are also described. The document outlines growth patterns in various regions of the mandible, including the condyle, coronoid process, ramus, body, and angle. Clinical implications related to manipulation of condylar growth are mentioned. In summary, the document reviews the embryological development and postnatal growth patterns that shape the mandible.
Growth and development nasomaxillary complex/ dental implant coursesIndian 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
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
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
Growth and development of mandible /certified fixed orthodontic courses by...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.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
00919248678078
Post natal growth of maxilla and mandibleDrArti Sharma
This document discusses postnatal growth of the maxilla and mandible. It defines growth, development, and the different phases of postnatal growth. For the maxilla, it describes the key growth mechanisms including endosteal and periosteal growth, cortical drift, the "V" principle, and counterparts in other structures. Growth occurs primarily in width early, then length, and lastly height. For the mandible, it discusses growth from birth to 1 year involving the ramus, condyle and body, and remodeling that occurs after age 1. Matrix and intramatrix rotation influence mandibular growth. Anomalies that can affect growth are also summarized.
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
The document summarizes the growth and development of the mandible and temporomandibular joint (TMJ) from the 6th week of intrauterine life through adulthood. It describes how the mandible develops from intramembranous and endochondral ossification centers, with secondary cartilages forming the condyle, coronoid process, and mental protuberance between 10-14 weeks. The condylar cartilage is an important growth center, with peak growth occurring during puberty. Associated structures like the teeth and muscles influence the development and remodeling of the mandible. Growth occurs through deposition and resorption at specific sites on the mandible.
The document discusses the development of the mandible from early embryogenesis through postnatal growth. It begins with the formation of Meckel's cartilage from the first pharyngeal arch which later contributes to mandibular formation. Ossification begins around the mental nerve and spreads to form the body and ramus. Secondary cartilage appears including the condylar, coronoid, and symphyseal cartilage. The mandible continues developing after birth through remodeling processes like at the condyle which causes downward and forward growth of the mandible.
Growth and development of mandible in childrenDr. Harsh Shah
a brief idea about the development of mandible for indian students looking for a quick review from dentistry department
all the best to students
Presented by : Harsh SHah
Dept. of Orthodontics
SDDCH PBN
“Growth was concieved by an anatomist, born to a biologist, delivered by a physician, left on a chemist doorstep, and adopted by a physiologist.At an early age- she eloped with a statistician, divorced him for a psycologist, and is now wooed, alternatively and concurrently, by an endrocrinologist, a biochemist,a physicist, a mathematician, an orthodontist, a eugenicist and the children’s bureau”.
THE PRENATAL LIFE IS DIVIDED INTO THREE PERIODS –
1.PERIOD OF THE OVUM
2.PERIOD OF THE EMBRYO
3.PERIOD OF THE FETUS
About the fourth week of intrauterine life, the pharyngeal arches are laid down
The first arch is called the mandibular arch and the second arch the hyoid arch.
The document discusses growth of the craniofacial complex, including the maxilla, mandible, and soft tissues. Growth occurs through bone apposition, remodeling, and endochondral ossification at sutures and synchondrosis. The maxilla grows downward and forward through remodeling and addition of bone in sutures. The mandible grows through remodeling in the ramus, resulting in a downward and forward displacement. Deviations from normal growth can occur due to trauma, disease, or genetic syndromes.
The document summarizes growth patterns in different areas of the skull. It discusses three main types of growth: hypertrophy, hyperplasia, and extracellular secretion. Growth of the cranial vault occurs primarily at sutures through periosteal activity. The cranial base grows through endochondral ossification at synchondroses. The maxilla grows both by displacement from cranial base growth until age 6 and then by sutural growth, with bone remodeling on its surfaces. Mandibular growth involves both endochondral growth at the condyle and periosteal growth along the posterior ramus surface.
The document summarizes the development of the maxilla bone from the 4th week of gestation through postnatal growth. During the 4th week, maxillary processes develop from the mandibular arches on either side of the frontonasal process and stomodeum. The maxilla ossifies from mesenchyme in the maxillary processes. Postnatally, the maxilla grows through displacement by growth of the maxillary tuberosity, growth at sutural connections to the cranial base, and surface remodeling through bone deposition and resorption.
This document summarizes the prenatal development and postnatal growth of the mandible. It begins with an overview of the formation of pharyngeal arches during embryonic development, including the mandibular arch which gives rise to the lower jaw. Meckel's cartilage provides a template for mandibular growth. Ossification begins in the mandible through intramembranous and endochondral bone formation. After birth, various regions such as the ramus, body, angle, and condyle continue growing through bone deposition and resorption to accommodate the erupting teeth and enlarging muscles. Growth generally ceases around age 20.
Post natal growth of the Head - Dr. Maher FoudaMaher Fouda
The infant's head is large relative to the body due to the advanced development of the brain. The face forms a smaller proportion of the head in infants compared to adults. Growth of the head and face occurs through both appositional growth on bone surfaces and interstitial growth of cartilage that is later replaced by bone. Several sutures allow growth at the cranial vault and base, while growth of the face involves both sutural growth and surface apposition of the maxilla and mandible to reposition teeth and facial structures. Growth continues through childhood and adolescence at different rates for different skeletal structures.
Growth of Nasomaxillary Complex and MandibleCing Sian Dal
The nasomaxillary complex grows through bone deposition and resorption, displacement, remodeling, and sutural growth. The maxillary tuberosity is a major site of growth, growing posteriorly, laterally, and downward. This results in horizontal elongation and widening of the maxillary arch. The whole maxilla undergoes primary displacement downward and forward. Secondary displacement from expansion of the middle cranial fossa also displaces the complex forward. Sutural growth occurs where new bone is deposited at sutures to sustain contact as the maxilla is displaced. Remodeling growth remodels the anterior maxilla. The alveolar bone and teeth are displaced downward and increase in width through vertical remodeling growth.
The document summarizes the growth and development of the maxilla and mandible. It discusses the prenatal embryology and postnatal growth of both structures. During prenatal development, the maxilla and mandibular arches form from the first pharyngeal arch. The palatal shelves then grow and fuse to form the secondary palate. Postnatally, the maxilla grows through displacement, growth at sutures, and surface remodeling, which increases its size and changes its shape.
The document discusses growth and development of the maxilla from prenatal to postnatal periods. It describes how the maxilla develops from maxillary processes in the embryo. During prenatal growth, the maxilla is displaced downward and forward as the cranial base grows. Postnatally, the maxilla grows through bone deposition, remodeling at sutures, and expansion of the maxillary sinus. The primary palate develops early from the median palatine process, while the secondary palate forms from the palatine shelves fusing in the midline.
The maxilla develops through both intramembranous and endochondral ossification prenatally. Around 4 weeks, the maxillary processes develop from the first branchial arches and grow medially to form the lateral walls of the primitive mouth. The palate develops from the maxillary processes, which give rise to the palatal shelves beginning around 6 weeks. The palatal shelves initially grow vertically but then reorient horizontally between 7-8 weeks to fuse in the midline and form the secondary palate by 8.5 weeks.
Growth of maxilla and cranium /certified fixed orthodontic courses by India...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.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
00919248678078
The document provides an overview of the mandible, including its anatomy, development, age-related changes, growth, muscle attachments, nerve and blood supply, and developmental anomalies. Key points include:
- The mandible develops from intramembranous ossification and has important growth sites at the condylar cartilage, borders of the rami, and alveolar ridge.
- Growth and remodeling of the condyle, rami, coronoid process, and angle allow the mandible to increase in length, height and flare with age.
- Muscle attachments including the masseter, temporalis, and lateral and medial pterygoids allow movements like elevation, protraction and grinding of the mand
The document summarizes the growth and development of the mandible from prenatal to postnatal stages. During prenatal development, the mandibular arch forms and fuses in the midline to form the mandible. Ossification begins from centers on each side and spreads. The condyle and coronoid process show endochondral bone formation. Postnatally, remodeling occurs throughout the mandible through bone deposition and resorption to accommodate tooth eruption, muscle growth, and maintain articulation with the cranial base as the face grows. Growth centers like the condyle, ramus, and coronoid process contribute to mandibular lengthening and shaping through adolescence.
This document summarizes the development of the maxilla and mandible prenatally and postnatally. Prenatally, the maxilla develops from the maxillary prominence and ossifies around 4 weeks gestation near the infraorbital nerve. The premaxilla also ossifies early and fuses with the maxilla. Palatine bones develop near the nasal capsule. Postnatally, the maxilla and palate grow through surface deposition, remodeling, and sutural growth. The mandible initially develops from Meckel's cartilage in the first pharyngeal arch and undergoes endochondral ossification through a condylar cartilage, allowing continued growth.
This document provides an overview of postnatal growth of the mandible. It discusses:
1. The shape of the neonatal mandible and how it undergoes considerable transformation during growth and development.
2. How the ramus becomes more prominent in height and width as muscles of mastication develop postnatally.
3. The five overlapping functional units of the mandible - the condyle, gonial region, coronoid process, alveolar process, and body.
4. Principles of mandibular growth including drift, displacement, remodeling, and rotations that alter its shape and position as it grows.
This document discusses concepts related to craniofacial growth and development. It notes that growth involves increases in size, number, and complexity over time through processes like hyperplasia and hypertrophy. Growth patterns vary between individuals in terms of timing and rate, and chronological age is not always indicative of developmental age. The sites and types of bone growth include intermembranous growth at sutures and periosteal surfaces, and endochondral growth at sites like synchondroses in the cranial base. Growth of the maxilla occurs through intermembranous processes and remodeling, while mandibular growth involves endochondral processes at the condyle and periosteal growth of the body.
The document discusses prenatal and postnatal growth of the mandible. It describes how the mandible develops from mesenchymal condensations in the pharyngeal arches during prenatal development. It forms through both intramembranous and endochondral ossification. The condyle, coronoid process, and mental region develop through endochondral ossification of cartilage models. Postnatally, the mandible grows downward and forward through appositional bone growth at the condyle, ramus, and alveolar processes to accommodate the permanent dentition. The chin develops through periosteal bone apposition on the lingual surface in males during late growth.
The document discusses the growth and development of the mandible. It begins with an overview of the prenatal development, including how the mandibular arch forms from the pharyngeal arches and contains Meckel's cartilage. Meckel's cartilage provides a template for the mandible to develop around it through intramembranous ossification beginning in the 7th week of prenatal development. The mandible continues developing and forming after birth through both intramembranous and endochondral ossification.
The document summarizes the development and growth of the maxilla. It discusses how the maxilla develops from several centers of ossification that spread bone formation in different directions. It also describes the development of the premaxilla and accessory cartilages. The maxilla continues growing after birth through sutural growth, alveolar process development, subperiosteal bone formation, and enlargement of the maxillary sinus through bone deposition and resorption.
Orthodontic vertical discrepancies 1- LONG FACE MaherFouda1
The vertical dimension of the face can be altered during orthodontic treatment through tooth extrusion or intrusion, growth modification, and orthognathic surgery. Growth patterns influence facial height, with "long face" growth resulting in backward mandibular rotation and increased lower anterior facial height, while "short face" growth shows forward rotation and decreased overbite. Understanding vertical growth factors is important for successfully treating vertical discrepancies.
This document provides an overview of cranial and facial development from prenatal through postnatal periods. It discusses how the cranium develops from both membranous and cartilaginous components, and how growth occurs after birth through processes like sutural growth, cortical drift and synchondrosis elongation. Premature fusion of sutures or synchondroses can lead to craniosynostosis and impact midfacial development and dental alignment. Genetic syndromes associated with abnormal skull growth are also mentioned.
Cleft lip and palate can occur individually or together. They have varying incidence rates among races. Treatment involves a multidisciplinary team and occurs in stages:
Stage I from birth to 18 months includes maxillary obturators, presurgical orthopedics, lip and palate surgery.
Stage II from 18 months to 5 years addresses the primary dentition with obturator adjustments and restorations.
Stage III from 6 to 11 years involves correcting crossbites during mixed dentition.
Stage IV from 12 to 18 years uses orthodontics and prosthodontics to complete treatment during permanent dentition. The goal is successful rehabilitation through a coordinated, long-term approach.
- Biomechanics in orthodontics refers to the reaction of dental and facial structures to orthodontic forces.
- Key concepts in biomechanics include force, center of mass, center of resistance, center of rotation, moment, and couple.
- The different types of tooth movement that can occur due to forces and moments include tipping, translation, root movement, rotation, intrusion, and extrusion. Efficient orthodontic treatment requires sound treatment plans backed by sound mechanical/biomechanical plans.
This document discusses the Twin Block functional appliance, including its development, designs, mode of action, and treatment techniques. It introduces the Twin Block, developed in 1977 to treat a young patient. Key features and benefits are outlined, along with bite registration procedures, component designs, and treatment stages. Modifications for treating various malocclusions are described, along with integration with fixed appliances. The versatility of the Twin Block for treating different malocclusions is emphasized.
Trigeminal neuralgia (TN), also known as tic douloureux, causes severe facial pain and is described as among the most excruciating pains. It is characterized by sporadic shock-like pains in areas of the face innervated by the trigeminal nerve. Common triggers include eating, talking, and facial touch. The condition is caused by blood vessel compression of the trigeminal nerve root at its entry point to the brainstem. Diagnosis is based on symptoms and neurological exam. Treatment options include medications, microvascular decompression surgery, and percutaneous rhizotomy procedures to ablate nerve fibers.
Surgical orthodontics procedures are carried out as an adjunct to orthodontic treatment to eliminate etiologic factors or correct severe dentofacial abnormalities. Major procedures include extractions of teeth, surgical uncovering of impacted teeth, frenectomy, pericision, and corticotomy. Minor procedures include extractions of carious, malformed, supernumerary, and impacted teeth. Orthodontic surgeries are used to treat severe orofacial disproportions not amenable to orthodontics alone and involve various osteotomies and genioplasty procedures. Pre-treatment diagnosis and planning includes medical evaluation, radiographs, study models, and cephalometric analysis.
Stainless steel is an alloy of iron and chromium that is resistant to corrosion. There are three main types of stainless steel - ferritic, martensitic, and austenitic. Austenitic stainless steel contains 18% chromium, 8% nickel, and 0.08-0.15% carbon and is the type most commonly used in dentistry. Removable appliances can be used to guide eruption, upright teeth, and allow for spontaneous tooth movement. They are fabricated using components like clasps, springs, and screws to apply forces. Common types of clasps include C-clasps, Jackson clasps, and Adam's clasps, which are made of wire and engage undercuts for retention.
This document discusses space maintainers, which are appliances used to maintain space lost prematurely due to tooth extraction. It defines space maintainers and classifies them as fixed or removable, functional or non-functional, unilateral or bilateral, active or passive, with or without bands, and combinations. Requirements for space maintainers are outlined, and removable, fixed, and specific types of space maintainers like distal shoe and crown and loop are described, including their advantages, disadvantages, and indications for use. Planning factors for space maintainers like time since tooth loss and dental age are also covered.
This document discusses skeletal maturity indicators that can be used to assess a patient's biological age and remaining growth potential. It describes how chronological age alone is not enough, and that skeletal age determined from hand wrist radiographs provides a more accurate assessment. The document outlines several methods for assessing skeletal age, including the Fishman skeletal maturity indicators and the Modified MP3 Cervical Vertebrae Maturation Index. It explains what each method evaluates and the stages involved. Assessing skeletal age is important for orthodontic treatment planning to determine treatment timing and prognosis.
Retention and relapse are important concepts in orthodontics. Retention is maintaining the corrected tooth positions after treatment, while relapse is the loss of correction. There are several theories on retention, including proper occlusion, apical base positioning, and mandibular incisor positioning. Retainers help maintain corrections and come in removable and fixed varieties. Factors that can lead to relapse include stretched periodontal ligament fibers, growth changes, inadequate bone adaptation, muscle imbalances, untreated etiologies, and third molar eruption. Maintaining corrections long-term may require permanent retention.
Preventive orthodontics aims to educate patients and parents, monitor growth and development, diagnose potential malocclusions, and treat issues before they arise. Preventive procedures include parent education, caries control, managing deciduous teeth, extracting supernumerary teeth, and treating habits. Space maintainers are used to preserve space from lost deciduous teeth. Removable space maintainers are easy to clean but can be lost, while fixed types do not interfere with eruption but require more skill. Common space maintainers include band and loop, lingual arch, distal shoe, and acrylic partial dentures.
The document summarizes prenatal craniofacial growth and development from the period of the ovum to the period of the fetus. It discusses the formation and ossification of structures like the cranial base, maxilla, mandible and palate. Key points include:
- The cranial base develops from mesenchymal tissue and forms cartilage centers that fuse to form the occipital, temporal and sphenoid bones.
- The maxilla develops from the first brachial arch and maxillary processes. The palate forms from the palatal shelves and separates the nasal cavities.
- The mandible develops from the first brachial arch and forms from intramembranous
Orthognathic surgery involves surgical procedures to correct dentofacial deformities involving the maxilla, mandible, or both. It is carried out along with orthodontic treatment. Indications include severe class II or III malocclusions, deep overbites, open bites, vertical excess or deficiency, asymmetry, and compromised periodontal health. The goals are optimal facial and dental aesthetics, functional occlusion, future oral health, rapid treatment, stability, and minimal morbidity. Treatment requires joint planning by an orthodontist and oral surgeon, including presurgical orthodontics, surgical splint fabrication, and sagittal, transverse, or vertical surgical procedures like le fort osteotomies or sagittal split
Orthodontic study models are accurate reproductions of a patient's teeth and surrounding tissues that are important diagnostic aids for orthodontists. Ideal study models accurately reproduce the dental anatomy without distortion, are trimmed symmetrically for easy identification of asymmetries, accurately reproduce occlusion when placed on their backs, and have a clean smooth surface while depicting as much of the alveolar process as possible. Study models consist of an anatomical stone plaster portion imprinted from the dental impression and an artistic plaster base that supports the anatomical portion and gives the models a pleasing symmetrical appearance.
This document discusses soldering and welding techniques for joining metals. It describes soldering as joining metals with a lower-melting alloy called solder. Key requirements for good solder include having a melting point below the base metals and similar strength. Hard solders like gold and silver solders are used in dentistry. Welding joins metals without another alloy, using techniques like spot welding, arc welding, and laser welding. Spot welding passes a current through the metals to generate heat and join them, while maintaining pressure until cooled. Fluxes are also discussed which help remove oxides during the process. Proper cleaning, temperature control, pressure, and techniques are needed for successful soldering and welding.
This document provides an overview of orthodontic diagnosis procedures. It discusses the importance of collecting pertinent data in a systematic manner to identify the nature and cause of orthodontic problems. The summary includes:
1. Essential diagnostic aids include case history, clinical examination, study models, and certain radiographs to assess the malocclusion.
2. The document outlines procedures for examining a patient's medical history, dental history, facial symmetry, jaw relationships, dentition, and functional assessment.
3. Functional examination assesses factors like postural rest position, path of closure, respiration, swallowing, and temporomandibular joint function to evaluate normal function.
This document provides an overview of orthodontic appliances, including definitions, classifications, components, and examples. It discusses both removable and fixed appliances. Removable appliances are further divided into active, passive, and orthopedic categories. Examples of removable appliances include Hawley's retainers, Begg's retainers, bite plates, habit breakers, and space maintainers. Fixed appliances include brackets, wires, elastics, and functional appliances like Herbst and Twin Block. The document also covers indications, contraindications, advantages, and disadvantages of removable appliances as well as fabrication methods.
- The document discusses several dental cast analysis methods, including Ashley Howe's analysis, Pont's analysis, Bolton's analysis, and Moyer's mixed dentition analysis.
- These analyses involve measuring tooth widths, arch widths, and comparing values to determine discrepancies and space availability. Factors like crowding, extraction needs, and arch expansion potential are assessed.
- Specific measurements and formulas are provided to calculate values like total tooth material, premolar diameters, arch widths, tooth size ratios, and predicted widths of unerupted teeth based on erupted teeth.
This document discusses various methods of gaining space in orthodontic treatment, including:
1. Proximal stripping, expansion of arches, distalization, protracting anteriors, derotation of posteriors, and uprighting of molars.
2. Specific techniques are described like slow expansion using coffin springs or quad helix appliances, and rapid maxillary expansion using hyrax expanders.
3. Distalization methods include extra-oral forces, pendulum appliances, and lip bumpers.
4. Extractions, particularly of premolars, are also discussed as a space gaining technique, though recent advances aim to reduce reliance on extractions.
Orthodontics involves correcting teeth alignment and positioning. It aims to achieve functional efficiency, structural balance, and esthetic harmony through treatments like preventive, interceptive, corrective, and surgical orthodontics. Edward Hartley Angle is considered the father of modern orthodontics. He developed classifications of malocclusions and appliances like pin and tube and edgewise appliances. Other contributors included Calvin Case, Martin Dewey, Holly Broadbent, Raymond Begg, and Rolf Frankel who developed growth guidance appliances.
This document discusses interceptive orthodontics, which aims to prevent potential malocclusions from progressing into more severe ones. Key procedures discussed include serial extraction, correction of developing crossbites, controlling abnormal habits, regaining space after premature tooth loss, closing diastemas, muscle exercises, intercepting skeletal malrelations, and removing soft tissue or bony barriers inhibiting tooth eruption. Serial extraction involves the planned extraction of certain teeth to guide others into favorable positions. Developing anterior crossbites should be corrected early to prevent skeletal malocclusions. Interceptive orthodontics recognizes and eliminates irregularities and malpositions early to guide proper development.
This presentation was provided by Steph Pollock of The American Psychological Association’s Journals Program, and Damita Snow, of The American Society of Civil Engineers (ASCE), for the initial session of NISO's 2024 Training Series "DEIA in the Scholarly Landscape." Session One: 'Setting Expectations: a DEIA Primer,' was held June 6, 2024.
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ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...PECB
Denis is a dynamic and results-driven Chief Information Officer (CIO) with a distinguished career spanning information systems analysis and technical project management. With a proven track record of spearheading the design and delivery of cutting-edge Information Management solutions, he has consistently elevated business operations, streamlined reporting functions, and maximized process efficiency.
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Date: May 29, 2024
Tags: Information Security, ISO/IEC 27001, ISO/IEC 42001, Artificial Intelligence, GDPR
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Walmart Business+ and Spark Good for Nonprofits.pdfTechSoup
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How to Make a Field Mandatory in Odoo 17Celine George
In Odoo, making a field required can be done through both Python code and XML views. When you set the required attribute to True in Python code, it makes the field required across all views where it's used. Conversely, when you set the required attribute in XML views, it makes the field required only in the context of that particular view.
How to Manage Your Lost Opportunities in Odoo 17 CRMCeline George
Odoo 17 CRM allows us to track why we lose sales opportunities with "Lost Reasons." This helps analyze our sales process and identify areas for improvement. Here's how to configure lost reasons in Odoo 17 CRM
How to Build a Module in Odoo 17 Using the Scaffold MethodCeline George
Odoo provides an option for creating a module by using a single line command. By using this command the user can make a whole structure of a module. It is very easy for a beginner to make a module. There is no need to make each file manually. This slide will show how to create a module using the scaffold method.
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
2. There are many treatment modalities that can be initiated during the
growing age.
Post Natal Growth Of The Cranial Base
The maxilla is attached to the cranial base by means of a number of
sutures. The mandible is also attached to the cranial base at the TMJ.
Thus growth processes occuring at the cranial base can affect the
placement of maxilla and mandible.
The cranial base grows post-natally by – cortical drift and remodelling,
elongation at synchondroses and by sutural growth.
Remodeling And Cortical Drift
Remodeling refers to a process where bone deposition and resorption
occurs so as to bring about change in size, shape and relationship of the
bone. The cranium is divided into a number of compartments by bony
elevations and ridges present in the cranial base. These elevated ridges
and bony partitions show bone deposition, while the predominant part of
the floor shows bone resorption. This intracranial bone resorption helps
in increasing the intracranial space to accommodate the growing brain.
3. The cranial base is perforated by the passage of a number of blood
vessels and nerves communicating with the brain. The foramina that
allows these nerves and blood vessels undergo drifting by bone
deposition and resorption so as to constantly maintain their relationship
with the growing brain.
4. Most of the bones of the cranial base are formed by a cartilagenous
process. Later the cartilage is replaced by bone. Certain bands of
cartilage remain at the junction of various bones, these areas are called
Synchondroses. These are primary cartilages and important growth sites
of the cranial base. Important Synchondroses found in the cranial base
are – Spheno-occipital, Spheno-ethmoidal, Inter-sphenoid and
Intra-occipital synchondrosis.
Elongation At The Synchondrosis
• Spheno-occipital Synchondrosis – It is the cartilaginous junction
between the sphenoid and the occipital bones. It is believed to be the
most important and principal growth cartilage of the cranial base during
childhood. It is believed to be active upto 12-15 years of age. At 20 years
of age, the sphenoid and occipital segments then fuse in the midline.
It provides a pressure or compression adapted bone growth, in contrast
to tension adapted growth seen in sutures. This is because the cranial
base supports the weight of the brain and face which bears down on the
synchondrosis in the midline of the vranial base. As endochondral bone
growth occurs at the spheno-occipital synchondrosis, the sphenoid and
occipital bones are moved apart.
5. At the same time new endochondral bone is laid down in the medullary
region and cortical bone is formed in the endosteal and periosteal
regions. Thus the sphenoid and occipital bones increase in length and
width.
The direction of growth of the spheno occipital synchondrosis is upwards.
It therefore carries the anterior part of the cranium bodily forwards. The
growth at the synchondrosis continues till the obliteration of the same by
formation of bone.
Closure of the synchondrosis occurs at around 13-15 years of age.
6. • Spheno-ethmoid Synchondrosis – This is a cartilaginous band between
the sphenoid and ethmoid bone. It ossifies by 5-25 years of age.
• Inter-sphenoidal Synchondrosis – It is a cartilaginous band between the
2 parts of the sphenoid bone. It is believed to ossify at birth.
• Intra-Occipital Synchondrosis – This ossifies by 3-5 years of age.
7. Sutural Growth
The cranial base has a number of bones that are joined to one another
by means of sutures. Some of the sutures that are present are – Spheno-
frontal, Fronto-temporal, Spheno-ethmoid, Fronto-ethmoid and Fronto-
zygomatic.
As the brain enlarges during growth, bone formation occurs at the ends
of the bone.
Timing Of Cranial Base Growth
• By Birth, 55-60% of adult size
• By 4-7 years, 94% of adult size
• By 8-13 years, 98% of adult size
8. Post Natal Growth Of Maxilla
The growth of the naso-maxillary complex is produced by the following
mechanisms – displacement, growth at sutures and surface remodeling.
• Displacement – Maxilla is attached to the cranial base by means of
a number sutures. Thus the growth of the cranial base has a direct
bearing on the naso-maxillary growth.
A passive or secondary displacement of the naso-maxillary complex
occurs in a downward and forward direction as the cranial base
grows. The passive displacement of the maxilla is an important
growth mechanism during the primary dentiton years but becomes
less important as growth of cranial base slows.
A primary type of displacement is also seen in a forward direction.
This occurs by growth of the maxillary tuberosity in a posterior
direction. This results in the whole maxilla being carried anteriorly.
The amount of this forward displacement equals the amount of
posterior lengthening.
9.
10. • Growth At Sutures – The maxilla is connected to the cranium and
cranial base by a number of sutures, these are – Fronto-nasal,
Fronto-maxillary, Zygomatico-temporal, Zygomatico-maxillary and
Pterygo-palatine.
These sutures are all oblique and more or less are parallel to each
other. This allows the downward and forward repositioning of the
maxilla as growth occurs at these sutures. As growth of the
surrounding soft tissue occurs, the maxilla is carried downwards and
forwards. This leads to opening up of space at the sutural
attachments. New bone is now formed on either side of the suture.
Thus the overall size of the bones on either side increases. Hence a
tension related bone formation occurs at the sutures.
11. The following bone remodeling changes are seen in naso-maxillary
complex –
[i] Resorption occurs on the lateral surface of the orbital rim leading to
lateral movement of the eye-ball. To compensate, there is bone
deposition on the medial rim of the orbit and external surface of the
lateral rim.
[ii] The floor of the orbit faces superiorly, laterally and anteriorly. Surface
deposition occurs here and results in growth in a superior, lateral and
anterior direction.
[iii] Bone deposition occurs along the posterior margin of the maxillary
tuberosity. This causes lengthening of the dental arch and enlargement
of the antero-posterior dimension of the entire maxillary body. This helps
to accommodate the erupting molars.
• Surface Remodeling – Massive remodeling of bone occurs by bone
deposition and resorption, which increases the bone size, shape and its
functional relationship.
12. [iv] Bone resorption occurs on the lateral wall of the nose leading to an
increase in size of the nasal cavity.
[v] Bone resorption is seen on the floor of the nasal cavity. To
compensate, there is bone deposition on the palatal side. Thus s
downward shift occurs leading to increase in maxillary height.
[vi] The zygomatic bone moves in a posterior direction. This is achieved
by resorption on the anterior surface and deposition on the posterior
surface.
[vii] The face enlarges in width by bone formation on the lateral surface
of the zygomatic arch and resorption on its medial surface.
[viii] The ANS prominence increases due to bone deposition.
[ix] As the teeth start erupting, bone deposition occurs at the alveolar
margins. This increases the maxillary height and depth of the palate.
[x] The entire wall of the sinus, except the mesial wall undergoes
resorption. This results in increase in size of the maxillary antrum.
13.
14. Post Natal Growth Of Mandible
Of the facial bones, the mandible undergoes the largest amount of
post natal growth and also exhibits the largest variability in
morphology. While the mandible appears in the adult as a single
bone, it is developmentally and functionally divisible into several
skeletal sub-units. The basal bone or the body of the mandible forms
one unit, to which is attached the alveolar process, the coronoid
process, the condylar process, the angular process, ramus, lingual
tuberosity and the chin.
Ramus
The ramus moves progressively posteriorly by combination of
deposition and resorption. Resorption occurs on the anterior part and
deposition on the posterior region. This results in a drift of the ramus
posteriorly. The functions of remodeling of the ramus are: to
accommodate the increasing mass of masticatory muscles inserted
into it, to accommodate the enlarged breadth of the pharyngeal
space and to facilitate the lengthening of the mandibular body, which
in turn accomodates the erupting molars.
15. Corpus or Body Of Mandible
The anterior border of the adult ramus exhibits bone resorption,
while the posterior border shows bone deposition. The displacement
of the ramus results in the conversion of former ramal bone into the
posterior part of the body of mandible. In this manner the body of
the mandible lendthens. Thus additional space made available by
means of resorption of the anterior border of the ramus is made use
of to accommodate the erupting permanent molars.
Angle of The Mandible
On the lingual side of the angle of mandible - resorption takes place
on the posterio-inferior aspect, while deposition occurs on the
antero-superior aspect. On the buccal side, resorption occurs on the
anterio-superior part, while deposition takes place on the postero-
superior part. This results in flaring of the angle of the mandible as
age advances.
16.
17. The Lingual Tuberosity
The lingual tuberosity is a direct equivalent of the maxillary tuberosity,
which forms a major site of growth for the lower bony arch. It forms
the boundary between the ramus and the body. The lingual tuberosity
moves posteriorly by deposition on it’s posteriorly facing surface. The
lingual tuberosity protrudes in a lingual direction lies well towards the
midline of the ramus. The prominence of the tuberosity is increased by
the presence of a large resorption field just below it. This resorption
field produces a depression, the lingual fossa. The combination of
resorption in the fossa and depositionon the medial surface of the
tuberosity itself accentuates the prominence of the lingual tuberosity.
The Alveolar Process
Alveolar process develops in response to the presence of tooth buds.
As the teeth erupt the alveolar process develops and increases in
height by bone deposition at the margins. The alveolar bone adds to
the height and thickness of the body of the mandible and is
manifested as a ledge extending lingual to the ramus to accommodate
the 3rd molars. In case of absence of teeth, the alveolar bone fails to
develop and it resorbs in the event of tooth extraction.
18.
19. The Chin
In infancy, the chin is usually under developed. As age advances the
chin growth becomes significant. It is influenced by sexual and specific
genetic factors. Usually males have prominent chin. The mental
protuberance forms by bone deposition during childhood. Its
prominence is accentuated by bone resorption that occurs in the
alveolar region above it. The deepest point in this concavity is known
as Point B.
The Condyle
The condyle is an important growth site. The condylar head is covered
by a thin layer of cartilage called the condylar cartilage. The presence
of condylar cartilage covering the condyle is an adaptation to
withstand the compression that occurs at the joint. There are two
schools of thought regarding the role of the condyle –
• It was earlier believed that growth occurs at the surface of the
condylar cartilage by means of bone deposition. Thus the condyle
grows towards the cranial base. As the condyle pushes against the
cranial base, the entire mandible gets displaced forwards and
downwards.
20. • It is now believed that the growth of soft tissues including the
muscles and connective tissues carries the mandible forwards away
from the cranial base. Bone growth follows secondarily at the condyle
to maintain constant contact with cranial base.
The condylar growth rate increases at puberty reaching a peak
between 12.5 – 14 years. The growth ceases around 20 years.
21. The Coronoid Process
The growth of the coronoid process follows the enlarging ‘V’ principle.
Viewing the longitidanal section posteriorly - deposition occurs on the
lingual [medial] surfaces of the left and right coronoid process.
Although additions take place on the lingual side, the vertical
dimension of the coronoid process also increases. It follows the ‘V’
principle.
From the occlusal aspect, the deposition on the lingual of the coronoid
process brings about a posterior growth movement in the ‘V’ patern.
Briefly, the coronoid process has a propeller like twist, so that its
lingual side faces three general directions all at once – posteriorly,
superiorly and medially.