The document discusses the management of jaw tumors, including diagnosis, treatment planning, and surgical excision principles. Diagnosis involves history, examination, biopsy, and imaging. Treatment planning considers tumor factors like location, size, and histology. Surgical excision modalities range from conservative enucleation to more aggressive resection, depending on the tumor's aggressiveness, location, size, and duration. The goal is to completely remove the tumor while preserving adjacent structures.
Fibro-osseous lesions of the jaws
Fibrous dysplasia
Cemento-osseous dysplasia
Focal cemento-osseous dysplasia
Periapical cemento-osseous dysplasia
Florid cemento-osseous dysplasia
Ossifying fibroma
Juvenile aggressive ossifying fibroma
Cherubism
Fibro-osseous lesions (FOL) are characterized by replacement of normal bone architecture by collagen fibers and fibroblasts containing calcified tissue.
They include a wide variety of lesions of developmental, dysplastic and neoplastic origins with clinical and radiographic presentation and behavior.
Because of the histological similarities between diverse diseases, proper diagnosis requires correlation of history, clinical and radiographic findings.Fibrous Dysplasia
2. Reactive (dysplastic lesions arising in the tooth-bearing area (presumably of periodontal origin).
a. Periapical cemento-osseous dysplasia
b. Focal cemento-osseous dysplasia
c. Florid cemento-osseous dysplasia
3. Fibro-osseous neoplasms (widely designated as cementifying fibroma, ossifying fibroma or cemento-ossifying fibroma.Bone dysplasias
a. Fibrous dyspla i. Monostoticii. Polyostotic
iii. Polyostotic with endocrinopathy (McCune-Albright)
iv Osteofibrous dysplasia
b. Osteitis deformansc. Pagetoid heritable bone dysplasias of childhood
d. Segmental odontomaxillary dysplasia
2. Cemento-osseous dysplasias
a. Focal cemento-osseous dysplasia b. Florid cemento-osseous dysplasia
3.Inflammatory/reactive processes
a. Focal sclerosing osteomyelitisb. Diffuse sclerosing osteomyelitis
c. Proliferative periostitis
4. Metabolic Disease: hyperparathyroidism
5. Neoplastic lesions (Ossifying fibromas)
a. Ossifying fibromab. Hyperparathyroidism jaw lesion syndrome
c. Juvenile ossifying fibroma i. Trabecular typeii. Psammomatoid type
d. Gigantiform cementomas
Fibro-osseous lesions of the jaws
Fibrous dysplasia
Cemento-osseous dysplasia
Focal cemento-osseous dysplasia
Periapical cemento-osseous dysplasia
Florid cemento-osseous dysplasia
Ossifying fibroma
Juvenile aggressive ossifying fibroma
Cherubism
Fibro-osseous lesions (FOL) are characterized by replacement of normal bone architecture by collagen fibers and fibroblasts containing calcified tissue.
They include a wide variety of lesions of developmental, dysplastic and neoplastic origins with clinical and radiographic presentation and behavior.
Because of the histological similarities between diverse diseases, proper diagnosis requires correlation of history, clinical and radiographic findings.Fibrous Dysplasia
2. Reactive (dysplastic lesions arising in the tooth-bearing area (presumably of periodontal origin).
a. Periapical cemento-osseous dysplasia
b. Focal cemento-osseous dysplasia
c. Florid cemento-osseous dysplasia
3. Fibro-osseous neoplasms (widely designated as cementifying fibroma, ossifying fibroma or cemento-ossifying fibroma.Bone dysplasias
a. Fibrous dyspla i. Monostoticii. Polyostotic
iii. Polyostotic with endocrinopathy (McCune-Albright)
iv Osteofibrous dysplasia
b. Osteitis deformansc. Pagetoid heritable bone dysplasias of childhood
d. Segmental odontomaxillary dysplasia
2. Cemento-osseous dysplasias
a. Focal cemento-osseous dysplasia b. Florid cemento-osseous dysplasia
3.Inflammatory/reactive processes
a. Focal sclerosing osteomyelitisb. Diffuse sclerosing osteomyelitis
c. Proliferative periostitis
4. Metabolic Disease: hyperparathyroidism
5. Neoplastic lesions (Ossifying fibromas)
a. Ossifying fibromab. Hyperparathyroidism jaw lesion syndrome
c. Juvenile ossifying fibroma i. Trabecular typeii. Psammomatoid type
d. Gigantiform cementomas
Dr. Ahmed M. Adawy, Professor Emeritus, Dep. Oral & Maxillofacial Surgery. Former Dean, Faculty of Dental Medicine, Al-Azhar University. Mandibular angle fractures account for 23% to 42% of all facial fractures. Fracture of mandibular angle can be classified as (A) Vertical favorable or unfavorable, (B) Horizontally favorable of unfavorable. Traditionally, mandibular angle fractures have been treated with either closed reduction and inter-maxillary fixation or open reduction and internal fixation with or without inter-maxillary fixation. Patients treated with inter-maxillary fixation have a restricted airway and loose excess weight. Rigid internal fixation and early return to function have eliminated the use of wire osteosenthysis and prolonged use of inter-maxillary fixation. The principal of rigid fixation, however, have inherent set of disadvantages including damage to the inferior alveolar nerve and the marginal mandibular branch of facial nerve. Postoperative malocclusion rates are also high. With the introduction of semi-rigid technique fracture of the mandibular angle could be treated according to Champy’s Ideal lines of osteosenthysis. The technique involves placement of a single monocortial miniplate on the superior border of the mandible. However, some studies suggested using a second miniplate along the inferior border. Wether one or two miniplates should be used is still debatable. The application of 3D plates may provide additional stability in 3 dimension and good resistance against torque forces.
Odontogenic keratocyst (OKC) is the cyst arising from the cell rests of dental lamina. It can occur anywhere in the jaw, but commonly seen in the posterior part of the mandible. Radiographically, most OKCs are unilocular when presented at the periapex and can be mistaken for radicular or lateral periodontal cyst.
ORN is an inflammatory condition of bone that occurs after the bone has been exposed to therapeutic doses of radiation usually given for a malignancies.
Dr. Ahmed M. Adawy, Professor Emeritus, Dep. Oral & Maxillofacial Surgery. Former Dean, Faculty of Dental Medicine, Al-Azhar University. Mandibular angle fractures account for 23% to 42% of all facial fractures. Fracture of mandibular angle can be classified as (A) Vertical favorable or unfavorable, (B) Horizontally favorable of unfavorable. Traditionally, mandibular angle fractures have been treated with either closed reduction and inter-maxillary fixation or open reduction and internal fixation with or without inter-maxillary fixation. Patients treated with inter-maxillary fixation have a restricted airway and loose excess weight. Rigid internal fixation and early return to function have eliminated the use of wire osteosenthysis and prolonged use of inter-maxillary fixation. The principal of rigid fixation, however, have inherent set of disadvantages including damage to the inferior alveolar nerve and the marginal mandibular branch of facial nerve. Postoperative malocclusion rates are also high. With the introduction of semi-rigid technique fracture of the mandibular angle could be treated according to Champy’s Ideal lines of osteosenthysis. The technique involves placement of a single monocortial miniplate on the superior border of the mandible. However, some studies suggested using a second miniplate along the inferior border. Wether one or two miniplates should be used is still debatable. The application of 3D plates may provide additional stability in 3 dimension and good resistance against torque forces.
Odontogenic keratocyst (OKC) is the cyst arising from the cell rests of dental lamina. It can occur anywhere in the jaw, but commonly seen in the posterior part of the mandible. Radiographically, most OKCs are unilocular when presented at the periapex and can be mistaken for radicular or lateral periodontal cyst.
ORN is an inflammatory condition of bone that occurs after the bone has been exposed to therapeutic doses of radiation usually given for a malignancies.
Jaw lesion radiology ppt ppt . This powerpoint presentation includes important anatomy, radiographs and important pathology of jaw lesion with its imaging feature as well as its Xray ct mri image. This will help alot. this will help for radiology resident as well as ent resident and event dentist.
A cyst is an epithelium-lined sac containing fluid or semisolid material. In the formation of a cyst, the epithelial cells first proliferate and later undergo degeneration and liquefaction. The liquefied material exerts equal pressure on the walls of the cyst from within. Cysts grow by expansion and thus displace the adjacent teeth by pressure. May can produce expansion of the cortical bone. On a radiograph, the radiolucency of a cyst is usually bordered by a radiopaque periphery of dense sclerotic bone. The radiolucency may be unilocular or multilocular. Odontogenic cysts are those which arise from the epithelium associated with the development of teeth. The source of epithelium is from the enamel organ, the reduced enamel epithelium, the cell rests of Malassez or the remnants of the dental lamina.
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.
mixed radiolucent and radiopaque lesions / oral surgery 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.
Radiopacities not necessarily contacting teeth/ 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.
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.
Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
Prix Galien International 2024 Forum ProgramLevi Shapiro
June 20, 2024, Prix Galien International and Jerusalem Ethics Forum in ROME. Detailed agenda including panels:
- ADVANCES IN CARDIOLOGY: A NEW PARADIGM IS COMING
- WOMEN’S HEALTH: FERTILITY PRESERVATION
- WHAT’S NEW IN THE TREATMENT OF INFECTIOUS,
ONCOLOGICAL AND INFLAMMATORY SKIN DISEASES?
- ARTIFICIAL INTELLIGENCE AND ETHICS
- GENE THERAPY
- BEYOND BORDERS: GLOBAL INITIATIVES FOR DEMOCRATIZING LIFE SCIENCE TECHNOLOGIES AND PROMOTING ACCESS TO HEALTHCARE
- ETHICAL CHALLENGES IN LIFE SCIENCES
- Prix Galien International Awards Ceremony
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- 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
Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journeygreendigital
Tom Selleck, an enduring figure in Hollywood. has captivated audiences for decades with his rugged charm, iconic moustache. and memorable roles in television and film. From his breakout role as Thomas Magnum in Magnum P.I. to his current portrayal of Frank Reagan in Blue Bloods. Selleck's career has spanned over 50 years. But beyond his professional achievements. fans have often been curious about Tom Selleck Health. especially as he has aged in the public eye.
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Introduction
Many have been interested in Tom Selleck health. not only because of his enduring presence on screen but also because of the challenges. and lifestyle choices he has faced and made over the years. This article delves into the various aspects of Tom Selleck health. exploring his fitness regimen, diet, mental health. and the challenges he has encountered as he ages. We'll look at how he maintains his well-being. the health issues he has faced, and his approach to ageing .
Early Life and Career
Childhood and Athletic Beginnings
Tom Selleck was born on January 29, 1945, in Detroit, Michigan, and grew up in Sherman Oaks, California. From an early age, he was involved in sports, particularly basketball. which played a significant role in his physical development. His athletic pursuits continued into college. where he attended the University of Southern California (USC) on a basketball scholarship. This early involvement in sports laid a strong foundation for his physical health and disciplined lifestyle.
Transition to Acting
Selleck's transition from an athlete to an actor came with its physical demands. His first significant role in "Magnum P.I." required him to perform various stunts and maintain a fit appearance. This role, which he played from 1980 to 1988. necessitated a rigorous fitness routine to meet the show's demands. setting the stage for his long-term commitment to health and wellness.
Fitness Regimen
Workout Routine
Tom Selleck health and fitness regimen has evolved. adapting to his changing roles and age. During his "Magnum, P.I." days. Selleck's workouts were intense and focused on building and maintaining muscle mass. His routine included weightlifting, cardiovascular exercises. and specific training for the stunts he performed on the show.
Selleck adjusted his fitness routine as he aged to suit his body's needs. Today, his workouts focus on maintaining flexibility, strength, and cardiovascular health. He incorporates low-impact exercises such as swimming, walking, and light weightlifting. This balanced approach helps him stay fit without putting undue strain on his joints and muscles.
Importance of Flexibility and Mobility
In recent years, Selleck has emphasized the importance of flexibility and mobility in his fitness regimen. Understanding the natural decline in muscle mass and joint flexibility with age. he includes stretching and yoga in his routine. These practices help prevent injuries, improve posture, and maintain mobilit
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, S...Oleg Kshivets
RESULTS: Overall life span (LS) was 2252.1±1742.5 days and cumulative 5-year survival (5YS) reached 73.2%, 10 years – 64.8%, 20 years – 42.5%. 513 LCP lived more than 5 years (LS=3124.6±1525.6 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.1% vs.63.7%, P=0.00001 by log-rank test). AT significantly improved 5YS (66.3% vs. 34.8%) (P=0.00000 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, histology, glucose, AT, blood cell circuit, prothrombin index, heparin tolerance, recalcification time (P=0.000-0.038). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), erythrocytes/CC (4), eosinophils/CC (5), healthy cells/CC (6), lymphocytes/CC (7), segmented neutrophils/CC (8), stick neutrophils/CC (9), monocytes/CC (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunoradiotherapy for LCP with unfavorable prognosis.
Recomendações da OMS sobre cuidados maternos e neonatais para uma experiência pós-natal positiva.
Em consonância com os ODS – Objetivos do Desenvolvimento Sustentável e a Estratégia Global para a Saúde das Mulheres, Crianças e Adolescentes, e aplicando uma abordagem baseada nos direitos humanos, os esforços de cuidados pós-natais devem expandir-se para além da cobertura e da simples sobrevivência, de modo a incluir cuidados de qualidade.
Estas diretrizes visam melhorar a qualidade dos cuidados pós-natais essenciais e de rotina prestados às mulheres e aos recém-nascidos, com o objetivo final de melhorar a saúde e o bem-estar materno e neonatal.
Uma “experiência pós-natal positiva” é um resultado importante para todas as mulheres que dão à luz e para os seus recém-nascidos, estabelecendo as bases para a melhoria da saúde e do bem-estar a curto e longo prazo. Uma experiência pós-natal positiva é definida como aquela em que as mulheres, pessoas que gestam, os recém-nascidos, os casais, os pais, os cuidadores e as famílias recebem informação consistente, garantia e apoio de profissionais de saúde motivados; e onde um sistema de saúde flexível e com recursos reconheça as necessidades das mulheres e dos bebês e respeite o seu contexto cultural.
Estas diretrizes consolidadas apresentam algumas recomendações novas e já bem fundamentadas sobre cuidados pós-natais de rotina para mulheres e neonatos que recebem cuidados no pós-parto em unidades de saúde ou na comunidade, independentemente dos recursos disponíveis.
É fornecido um conjunto abrangente de recomendações para cuidados durante o período puerperal, com ênfase nos cuidados essenciais que todas as mulheres e recém-nascidos devem receber, e com a devida atenção à qualidade dos cuidados; isto é, a entrega e a experiência do cuidado recebido. Estas diretrizes atualizam e ampliam as recomendações da OMS de 2014 sobre cuidados pós-natais da mãe e do recém-nascido e complementam as atuais diretrizes da OMS sobre a gestão de complicações pós-natais.
O estabelecimento da amamentação e o manejo das principais intercorrências é contemplada.
Recomendamos muito.
Vamos discutir essas recomendações no nosso curso de pós-graduação em Aleitamento no Instituto Ciclos.
Esta publicação só está disponível em inglês até o momento.
Prof. Marcus Renato de Carvalho
www.agostodourado.com
The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
Pulmonary Thromboembolism - etilogy, types, medical- Surgical and nursing man...VarunMahajani
Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
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4. History & Examination
History of the lesion
Duration
Mode of onset and progress
Exact site and shape
Change in character of the lesion
Associate symptoms
Similar swelling elsewhere
Loss of body weight
Recurrence
Habit
5. History & Examination
Inspection
Number
Size
Site or anatomical location
Shape and size
Colour
Surface
Pedunculated/sessile
Overlying skin
Clinical Examination of the Lesion
Palpation
Consistency of lesion
Presence of pulsation
Fixity
Lymph node examination
7. Biopsy
Indications;
• Any persistent pathologic condition that cannot be clinically diagnosed
• Lesions with no identifiable cause that persists for greater than 2 weeks despite
local therapy
• Enlarging intrabony lesions
• Visible/ palpable submucosal swelling beneath clinically normal mucosa
• Any lesion with malignant/ premalignant characteristics
• Confirmation of clinical diagnosis
• Lesions not responding to routine clinical management over 2 weeks
• Any lesion that is of extreme concern for patient
9. Incision Biopsy
Indications:
Large lesion > 1 cm diameter
Location in risky or hazardous
regions
Principles
Site is carefully chosen after thorough clinical and radiological
examination
Aspiration is always tried before
Incision in wedge shaped fashion
Normal tissue should be included
Tissue specimen should not be crushed
Deeper biopsies over superficial ones
Proper hemostasis before closure
Specimen should be well oriented and marked
Tissue is immediately placed in formalin
10.
11.
12. Intraosseous Biopsy
ı Performed after thorough Neck examination as cervical lymphadenitis is
inevitable after the procedure rendering clinical neck examination to produce
false positive results
ı Necessary because diagnosis from frozen section not possible
ı Site: Extraction socket or flap reflection
ı Full thickness mucoperiosteal flap of adequate extention is made.
ı Flap should rest entirely on sound bone for closure. Eroded area of cortical
bone should be approached from the lesion margins over sound bone.
ı Major neurovascular structures should be avoided.
ı Precautionary aspiration performed before biopsy to prevent inadverant
excision into vascular lesion.
ı Osseous window created on the cortical plate either with bur of rongeurs.
ı Specimen can be curetted from the surrounding bone.
14. Tumors of odontogenic
epithelium
o Ameloblastoma
• Malignant ameloblastoma
• Ameloblastic carcinoma
o Calcifying epithelial
odontogenic tumor
o Squamous odontogenic tumor
o Clear cell odontogenic
carcinoma
o Primary intraosseous carcinoma
Tumors of odontogenic epithelium
With odontogenic ectomesenchyme
± dental hard tissue formation
o Ameloblastic fibroma
o Ameloblastic fibro-odontoma
o Ameloblastic fibrosarcoma
o Odontoameloblastoma
o Odontoma
• Compound composite
• Complex composite
o Adenomatoid odontogenic tumor
Tumors of odontogenic
ectomesenchyme
± included odontogenic
epithelium
o Odontogenic fibroma
o Granular cell odontogenic
tumor
o Odontogenic myxoma
o Cementoblastoma
Benign Odontogenic tumors
15. Benign Non-odontogenic tumors
Osteogenic neoplasm
o Ossifying fibroma
o Osteoma
Non neoplastic bone lesions
o Fibrous Dysplasia
o Cementoosseous dysplasia
• Periapical
cementoosseous dysplasia
• Focal cementoosseous
dysplasia
• Florid cementoosseous
dysplasia
Other cementoosseous dysplasia
o Cherubism
o Central Giant Cell Granuloma
16. Odontogenic Carcinomas
o Malignant (metastasizing) ameloblastoma
o Ameloblastic carcinoma
• Primary
• Dedifferentiated
• Peripheral
o Primary intraosseous squamous cell carcinoma
• Solid
• Cystogenic
Nonkeratinizing cyst
Odontogenic keratocyst
o Clear cell odontogenic carcinoma
o Malignant epithelial odontogenic ghost cell
tumor
Odontogenic Sarcoma
o Ameloblastic fibrosarcoma
Odontogenic malignancies
17. Non Odontogenic malignancies
o Osteosarcoma
o Fibrosarcoma and chondrosarcoma
o Squamous cell carcinoma
o Secondary (metastatic) bone tumours
18. Peak age Adults, about 40 years old.
Frequency Rare, but still the most common odontogenic tumour; 1% of all oral
tumors, 18% of all odontogenic tumors
Site Posterior body/angle/ramus of mandible, very occasionally involves the
maxilla.
Clinical Feature asymptomatic, slow growing, hard, non tender, ovoid
swelling; may be associated with mobile teeth, exfoliation of teeth, ill fitting
dentures, malocclusion, paraesthesia or ulcerations; large lesion may present
with egg shell crackling
Ameloblastoma
19. Shape
— Multilocular, distinct septa dividing the lesion into compartments with large,
apparently discrete areas centrally and with smaller areas on the periphery;
Occasionally monolocular in early stages
— Honeycomb or soap-bubble appearance or multicystic
— shape varies with different histological subtypes.
Outline
— Smooth and scalloped; Well defined, Well corticated.
Radiodensity Radiolucent with internal radiopaque septa.
Effects
— Adjacent teeth displaced, loosened, often resorbed
— Extensive expansion in all dimensions; Buccolongual cortical expansion prominent
Thin “eggshell” cortical bone
— Maxillary lesions can extend into the paranasal sinuses, orbit or base of the skull
20.
21. Odontomes
Age 1st and 2nd decades
Site commonly seen in; posterior mandible, anterior maxilla esp in third
molar region
Clinical Features asymptomatic, no obvious bony or facial asymmetry; may
be associated with unerupted teeth
22. Compound odontome
It is made up of several small toothlike
denticles. The miniature tooth shapes are
of dental tissue radiodensity, with a
surrounding radiolucent line, and are
easily identified radiographically.
Complex odontome
This odontome is made up of an irregular,
confused mass of dental tissues bearing
no resemblance in shape to a tooth. The
enamel content provides the dense
radiopacity, suggestive of dental tissue
and again the mass is surrounded by a
radiolucent line
23. Fibrous dysplasia
Age 10-20 year-old adolescents.
Site Maxilla — usually posteriorly, more commonly than the mandible.
Maxillary lesions may spread to involve adjacent bones such as the zygoma,
sphenoid, occiput and base of skull.
Size Variable and difficult to define.
Shape Round.
24. Outline
— Poorly defined with the margins merging imperceptibly with adjacent normal bone
— Not corticated.
Radiodensity
— Initially radiolucent (but rarely seen clinically at this stage)
— Gradually becomes opaque to produce the typical ground glass, orange peel and
finger print appearances resulting from superimposition of many fine, poorly-calcified
bone trabeculae arranged in a disorganized fashion.
— Continuing to become more opaque with age.
Effects
— Adjacent teeth
— sometimes displaced but rarely resorbed
— loss of associated lamina dura
— Buccal and lingual alveolar expansion
— Encroachment on, or obliteration of, the antrum
— Involvement of adjacent bones including the base of the skull.
25.
26. Age Younger adults lesser than 30 years old.
Frequency Rare, but the most common primary malignant bone tumour.
Site Usually the mandible.
Size
Shape
Outline
Radiodensity
From a radiological viewpoint, there are three main types:
Osteolytic — no neoplastic bone formation
Osteosclerotic — neoplastic osteoid and bone formed
Mixed lytic and sclerotic — patches of neoplastic bone formed.
All very variable
depending on the type of
lesion (lytic or sclerotic)
and how long it has been
present.
Osteosarcoma
27. Effects
Early features: Non-specific, poorly defined radiolucent area around one or more
teeth. Widening of the periodontal ligament space.
Later features:
• Osteolytic lesion:
— Monolocular, ragged area of radiolucency
— Poorly defined, moth-eaten outline.
— Cumulous cloud densities
— So-called spiking resorption and/or loosening of associated teeth.
• Osteosclerotic and mixed lesions:
— Poorly defined radiolucent area
— Variable internal radiopacity with obliteration of the normal trabecular
pattern
— Perforation and expansion of the cortical margins by stretching the
periosteum, producing the classical, but rare sun ray or sunburst appearance
— Spiking resorption and/or loosening of associated teeth
— Distortion of the alveolar ridge
28.
29. Squamous cell carcinomas of the oral mucosadirectly overlying bone, in their latter
stages, often invade the underlying bone to produce a destructive radiolucency.
Age Adults over 50 years old.
Frequency Rare, but the most common oral malignant tumour.
Site Mandible, or maxilla if originating in the antrum.
Size Variable.
Squamous cell carcinoma
30. Shape Irregular area of bone destruction often initially saucer-shaped.
Outline
— Irregular and moth-eaten
— Poorly defined
— Not corticated.
Radiodensity Radiolucent, radiodensity dependent on degree of destruction.
Effects
— Adjacent teeth may be displaced, loosened and/or resorbed or left
floating in space
— Destruction of surrounding bone may lead to pathological fracture.
31.
32.
33. Treatment Planning
Diagnosis confirmed by biopsy
Imaging for assessment of extension
For malignant lesions;
• Evaluation for staging; Neck assessment
• Approach for primaries: surgery/chemotherapy/radiotherapy
• Approach for secondaries
• Palliative approach
For benign lesions;
• Surgical approach
Reconstruction
36. Primary Tumors (T)
TX Primary tumor cannot be assessed
T0 No evidence of primary tumor
Tis Carcinoma in situ
T1 Tumor <=2 cm in greatest dimension
T2 Tumor >2 cm but <=4 cm in greatest dimension
T3 Tumor >4 cm in greatest dimension
T4a Tumor invades adjacent structures (eg, through
cortical bone, into deep
[extrinsic] muscle of the tongue, maxillary sinus, skin
of face) (resectable)
T4b Tumor invades masticator space, pterygoid
plates, or skull base or encases
internal carotid artery (unresectable)
Nodal Involvement (N)
NX Regional lymph nodes cannot be assessed
N0 No regional lymph node metastasis
N1 Metastasis in a single ipsilateral lymph node, <=3 cm in
greatest dimension
N2 Metastasis in a single ipsilateral lymph node, >3 cm but
<=6 cm in greatest dimension; or in multiple ipsilateral lymph
nodes,
<=6 cm in greatest dimension; or in bilateral or contralateral
lymph nodes, <=6 cm in greatest dimension
N2a Metastasis in a single ipsilateral lymph node >3 cm but
<=6 cm in greatest dimension
N2b Metastasis in multiple ipsilateral lymph nodes, <=6 cm in
greatest dimension
N2c Metastasis in bilateral or contralateral lymph nodes, <=6
cm
in greatest dimension
N3 Metastasis in a lymph node >6 cm in greatest dimension
39. Factors deciding Surgical modality
Aggressiveness of Lesions
Depends on biologic behavior of lesion depicted by histologic diagnosis.
Most Benign lesions treated conservatively without much destruction of
adjacent structures.
40. Factors deciding Surgical modality
Anatomic Location of Lesion
Lesion in easily accessible and resectable areas offer better
prognosis.
41. Factors deciding Surgical modality
Anatomic Location of Lesion
Maxilla vs mandible
Tumors in mandible are confined largely due to the thick cortical
plates but maxillary tumors tend to enlarge into the sinuses, orbit,
skull base and nasopharynx. They present a poorer prognosis.
42. Factors deciding Surgical modality
Anatomic Location of Lesion
Proximity to Adjacent Vital Structures
Benign lesions may cause damage to neurovascular structures and
teeth. Neurologic deficit and vascular compromise might occur.
Tumors can also be associated with root resorption.
43. Factors deciding Surgical modality
Anatomic Location of Lesion
Size of tumor
Larger tumor requires a larger segment of bone resection. Continuity
of mandible can be compromised leading to a more difficult
reconstruction process.
44. Factors deciding Surgical modality
Anatomic Location of Lesion
Intraosseous vs Extraosseous location
An aggressive oral lesion confined to the interior of jaw provides
better prognosis than a lesion invading surrounding soft tissues.
45. Factors deciding Surgical modality
Duration of Lesion
Slow growing lesions follow a benign course and hence treated
accordingly.
46. Factors deciding Surgical modality
Reconstructive efforts
Reconstructive procedures should be planned and anticipated
before surgery.
47. Modalities of Surgical excision
Enucleation (with or without curettage)
Resection
Marginal Resection
Partial Resection
Total Resection
Composite Resection
48. Modalities of Surgical excision
Enucleation (with or without curettage)
Indications:
• Tumors with expansile growth rather than by infiltration
• Well defined lesion with distinct separation from surrounding
tissue
• Tumor with corticated lining
49. Modalities of Surgical excision
Marginal/En bloc Resection
(Resection without continuity defect)
Indications:
• Recurrent lesion previously treated by enucleation alone
• Incompletely encapsulated or tendency to grow beyond
surgically apparent capsule
50. Modalities of Surgical excision
Marginal/En bloc Resection
(Resection without continuity defect)
Indications(for malignancy):
• Horizontal mandibulectomy for Gingivobuccal cancer reaching
close to mandible but not grossly involving mandible
• Lingual plate excision for lesions of floor of mouth or tongue
• Buccal plate excision for lesions of gingivobuccal complex with
minimal paramandibular spread
• Minimal cortical erosion
51. Modalities of Surgical excision
Segmental Resection
(Resection with continuity defect)
Indications:
• Lesions with infiltrative tendency
• Extension closer to inferior or posterior border of mandible,
maxillary sinus or nasal cavity
• High recurrence
• Lesions with chances of post operative fracture
53. Modalities of Surgical excision
Disarticulation
Whenever condylar head is included in the resection part of the
mandible, the procedure is known as hemi-mandibulectomy with
disarticulation and whereas the condylar head is retained for
rehabilitation procedure, then the procedure is known as hemi-
mandibulectomy without disarticulation
54. Modalities of Surgical excision
Total Resection
Resection of tumor with removal of involved bone
Involves:
Mandibulectomy
Maxillectomy
55. Modalities of Surgical excision
Maxillectomy
Total: it refers to surgical resection of the entire maxilla.
Resection includes the floor and medial wall of the orbit and
the ethmoid sinuses.
Sub total inferior: on alveolar ridge, palate, antral floor
Sub total anterior: for lesions anterior to maxillary 1st
premolar
56. Modalities of Surgical excision
Modifications for Total Maxillectomy
1. When the tumor extends up to the roof of the maxillary sinus
(but does not invade) the orbital floor should be included in
the resection
2. When the tumor invades the roof of the maxillary sinus, the
orbit or the ethmoidal sinuses, orbital exenteration is
mandatory
3. Tumors confined to the posterior aspect of the maxillary sinus
is managed with conservative resection sparing maxilla
57.
58. Modalities of Surgical excision
Composite Resection
Most common ablative procedure for locally advanced
malignant lesions
Involves,
• removal of involved mucosa, skin, mandible with a margin of at
least 2-2.5 cm
• Removal of neck nodes
60. Radical Neck Dissection
removal of all ipsilateral cervical
lymph node groups extending from
the inferior border of the mandible to
the clavicle, from the lateral border of
the sternohyoid muscle, hyoid bone,
and contralateral anterior belly of the
digastric muscle medially, to the anterior
border of the trapezius. Included
are levels I through V. This entails the
removal of three important nonlymphatic
structures—the internal jugular
vein, the sternocleidomastoid muscle,
and the spinal accessory nerve.
61. Modified Radical Neck Dissection
removal of the same lymph
node levels (I through V) as the radical
neck dissection, but with preservation
of the spinal accessory nerve, the
internal jugular vein, or the sternocleidomastoid
muscle.
62. Selective Neck Dissection
preservation of one or more lymph
node groups normally removed in a
radical neck dissection.
Extended Neck Dissection
removal of one or more additional
lymph node groups, nonlymphatic
structures, or both, not encompassed
by a radical neck dissection
64. Criteria for inoperability
Fixed neck nodal adenopathy
Recent onset of trismus (gross infratemporal fossa invasion)
Base skull involvement
Extensive soft tissue involvement
Distant metastasis
65. Radiotherapy
Indications
Multiple positive lymph nodes in the neck confirmatory of
metastasis
Extracapsular extension by metastatic disease
Perivascular or Perineural invasion
Gross residual disease following surgery; positive surgical
resection margins
Cranial nerve involvement or extension to skull base
66. Preradiotherapy
• Avoid radiation therapy for tumours involving the mandible
• Extract poor-prognosis teeth prior to starting treatment
• Remove cysts and odontomes
Postradiotherapy
• Stress on maintenance of oral and dental hygiene through and after radiation
therapy
• Avoid dental extraction, especially of multiple teeth after radiation therapy
• Removal of caries and extirpation of pulps
• Root canal therapy
• Prevent tooth loss
• Fluoride gel and mouthwashes
• Chlorhexidine mouthwashes
• Limit radiation caries with dental splint coverage
Considerations for patients undergoing
radiotherapy
67. Chemotherapy
Radiotherapy plus Cetuximab for Squamous-Cell Carcinoma of the Head and Neck
James A. Bonner, M.D., Paul M. Harari, M.D., Jordi Giralt, M.D., Nozar Azarnia, Ph.D., Dong M. Shin, M.D., Roger B. Cohen, M.D., Christopher U. Jones, M.D., Ranjan Sur,
M.D., Ph.D., David Raben, M.D., Jacek Jassem, M.D., Ph.D., Roger Ove, M.D., Ph.D., Merrill S. Kies, M.D., Jose Baselga, M.D., Hagop Youssoufian, M.D., Nadia Amellal, M.D.,
Eric K. Rowinsky, M.D., and K. Kian Ang, M.D., Ph.D.N Engl J Med 2006; 354:567-578February 9, 2006DOI: 10.1056/NEJMoa053422
BACKGROUND We conducted a multinational, randomized study to compare radiotherapy alone with radiotherapy plus cetuximab, a monoclonal antibody
against the epidermal growth factor receptor, in the treatment of locoregionally advanced squamous-cell carcinoma of the head and neck
METHODS Patients with locoregionally advanced head and neck cancer were randomly assigned to treatment with high-dose radiotherapy
alone (213 patients) or high-dose radiotherapy plus weekly cetuximab (211 patients) at an initial dose of 400 mg per square meter of body-
surface area, followed by 250 mg per square meter weekly for the duration of radiotherapy. The primary end point was the duration of control
of locoregional disease; secondary end points were overall survival, progression-free survival, the response rate, and safety.
RESULTS The median duration of locoregional control was 24.4 months among patients treated with cetuximab plus radiotherapy and 14.9 months among
those given radiotherapy alone (hazard ratio for locoregional progression or death, 0.68; P=0.005). With a median follow-up of 54.0 months, the median
duration of overall survival was 49.0 months among patients treated with combined therapy and 29.3 months among those treated with radiotherapy alone
(hazard ratio for death, 0.74; P=0.03). Radiotherapy plus cetuximab significantly prolonged progression-free survival (hazard ratio for disease progression
or death, 0.70; P=0.006). With the exception of acneiform rash and infusion reactions, the incidence of grade 3 or greater toxic effects, including mucositis,
did not differ significantly between the two groups.
CONCLUSIONS Treatment of locoregionally advanced head and neck cancer with concomitant high-dose radiotherapy plus cetuximab improves
locoregional control and reduces mortality without increasing the common toxic effects associated with radiotherapy to the head and neck
68. Reconstruction
Objectives
Achieve primary healing
Maintain oral competence
Facilitate swallowing
Prevent aspiration
Preserve speech
Restore continuity, bone height and bone bulk of jaw
69. Immediate reconstruction
Advatages
o Single stage surgery
o Early return of function
o Minimal compromise of esthetics
Disadvantages
o Recurrence in grafted bone
o Loss of graft from infection
Techniques:
1. Performing surgical excision and grafting, both
via intraoral approach
2. Surgical excision utilizing both intraoral and
extraoral approach; first obtaining water tight
oral closure and grafting done extraorally
3. Earlier extraction of involved teeth and waiting
for 6-8 wks for oral healing and surgery via
extraoral approach later
Reconstruction of Osseous Defect
70. Delayed reconstruction
• usually performed after 6 months of waiting period to observe for
recurrence
• Preferred in malignancies
• If rediotheray is anticiopated as it may jeopardise the graft
• Residual mandibular fragments are maintained with their normal
anatomic relationship (IMF/ Reconstruction plate) in order to avoid
muscular deformation and displacement of segments
Reconstruction of Osseous Defect
71. Modalities for repair of defect
Primary closure
Split thickness graft
Pedicled flap
Free composite graft with microvascular reconstruction
78. Survival & Prognosis
Prognostic factors
Advanced stage has poor survival rate
Carcinoma has poor prognosis than benign lesions
Depends on site of lesion. Eg Lesions in posterior 1/3 of tongue has worst
prognosis
Perineural invasion and angioinvasion has poor prognosis
Tumor thickness >6 mm has poor prognosis
Histologically positive lymph nodes carry poor prognosis
79. Survival & Prognosis
Stage of presentation
(for malignant lesions)
5 year Survival rate %
I 80 – 90
II 65 – 75
III 40 – 50
IV 30
80. References
Hupp, Ellis III, Tucker; Contemporary Oral and Maxillofacial Surgery; 5/e; Elsevier
Inc; 2008
Laskin DM; Oral and Maxillofacial surgery Vol. 2; Mosby Co.;1996
Malik NA; Textbook of Oral and Maxillofacial Surgery; 2/ed; Jaypee; 2008
Fonseca RJ; Oral and Maxillofacial Surgery Vol. 5; WB Saunders; 2000
Booth PW, Schendel SA, Hausamen JE; Maxillofacial Surgery Vol. 2; Harcourt Brace
and Co., 1999