This document provides an overview of temporomandibular joint ankylosis. It begins with definitions and historical perspectives on the condition. It then discusses the etiology, pathogenesis, classifications, anatomy, and treatment approaches for TMJ ankylosis. Key points include that ankylosis involves pathologic changes that limit jaw movement, common causes are trauma, infection, inflammation, and it can be classified as true/false, complete/partial, and bony/fibrous. The document provides detailed anatomy of the TMJ and surrounding structures to inform surgical treatment approaches.
This seminar explains about the development, relations, ligaments, various attachments, vascular and nervous supply and various surgical approaches and its modifications to TMJ
This seminar explains about the development, relations, ligaments, various attachments, vascular and nervous supply and various surgical approaches and its modifications to TMJ
Detailed discussion on diagnosis and management of TMJ ankylosis. Surgical anatomy and applied aspects of TMJ is discussed. Reconstruction of ramus-condyle unit is also discussed. Compications of TMJ surgery are also discussed
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.
The presentation deals with the basics required for studying TMJ ankylosis. The text has been simplified and presented. It is well supported with illustrations.
Suggestions and feedback will be well appreciated. :)
Arthrocentesis of the temporomandibular jointAhmed Adawy
Dr. Ahmed M. Adawy, Professor Emeritus, Dep. Oral & Maxillofacial Surgery. Former Dean, Faculty of Dental Medicine, Al-Azhar University. Arthrocentesis of the temporomandibular joint refers to lavage of the upper joint space, hydraulic pressure and manipulation to release adhesions of the “anchored disc phenomenon” and improve motion. The technique of arthrocentesis is discussed together with the indications and contraindications of the procedure. Further, the presentation includes modifications of the standard technique.
Dear Readers,
this is my ppt was made from a book of BAGHERI ( Current therapy in oral and maxillofacial surgery)- 2012 PLUS other sources.. hope you find it beneficial.
have a nice day,
hanan
Detailed discussion on diagnosis and management of TMJ ankylosis. Surgical anatomy and applied aspects of TMJ is discussed. Reconstruction of ramus-condyle unit is also discussed. Compications of TMJ surgery are also discussed
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.
The presentation deals with the basics required for studying TMJ ankylosis. The text has been simplified and presented. It is well supported with illustrations.
Suggestions and feedback will be well appreciated. :)
Arthrocentesis of the temporomandibular jointAhmed Adawy
Dr. Ahmed M. Adawy, Professor Emeritus, Dep. Oral & Maxillofacial Surgery. Former Dean, Faculty of Dental Medicine, Al-Azhar University. Arthrocentesis of the temporomandibular joint refers to lavage of the upper joint space, hydraulic pressure and manipulation to release adhesions of the “anchored disc phenomenon” and improve motion. The technique of arthrocentesis is discussed together with the indications and contraindications of the procedure. Further, the presentation includes modifications of the standard technique.
Dear Readers,
this is my ppt was made from a book of BAGHERI ( Current therapy in oral and maxillofacial surgery)- 2012 PLUS other sources.. hope you find it beneficial.
have a nice day,
hanan
TMJ is formed by the mandibular condyle and the mandibular fossa of the temporal bone. The articular disc separates these two bones from direct articulation .
The main components of TMJ
Mandibular condyles
Articular surface of temporal bone
Articular disc
LigamentsSPHENOMANDIBULAR LIGAMENT
morphologically, it is remnant of cephalic end of meckel’s cartilage is attached
superiorly to: spine of sphenoid bone
inferiorly to: lingula of mandibular foramen
laterally related to: lateral pterygoid muscle, auriculotemporal nerve, maxillary artery.
medially related to: chorda tympani nerve.
near its lower end it is pierced by: mylohyoid nerves and vessels
STYLOMANDIBULAR LIGAMENT:
It is thickened part of deep cervical fascia.
Above: lateral surface of styloid process.
Below: angle and adjacent part of posterior part of ramus.
AGE CHANGES
CONDYLE:
Becomes more flattened
Fibrous capsule becomes thicker.
Osteoporosis of underlying bone.
Thinning or absence of cartilaginous zone.
ARTICULAR DISK:
Becomes thinner.
Shows hyalinization and chondroid changes.
BLOOD VESSELS AND NERVES:
Walls of blood vessels thickened.
These age changes lead to:
-Decrease in the synovial fluid formation
-Impairment of motion due to decrease in the disc and capsule extensibility
-Decrease the resilience during mastication due to chondroid changes into collagenous elements
-Dysfunction in older people
TMJ EXAMINATION
Examined both clinically and radiographically.
PALPATION OF TMJ is determined by digital palpation..
CREPITATION This is a grating or scalping noise that occurs on jaw movements. may be an early sign of degenerative joint disease. AUSCULTATION OF THE TMJ can be examined with a stethoscope. Also the timing of clicking during opening and closure can be noted.
CLICKING It occurs due to the uncoordinated movement of condylar head and TMJ disc. Joint clicking is differentiated as:
Initial clicking: it is a sign of retruded condyle.
Intermediate clicking: it is a sign of uneven condyle surfaces and articular disc.
Terminal clicking: it is an effect of the condyle being moved too far anteriorly in relation to the disc on maximum jaw opening. TMJ ARTHROGRAPHY
Norgaard (1940)
Indications:
Position and function of disk -pain and dysfunction-long standing
History of locking-persistent
Perforations of the disk and retrodiskal tissue.
Therapeutic :
To delineate loose bodies in the joint spaces
Diagnostic aspiration of joint fluid.
Intraarticular injections of steroids
Contraindications:
Infections in the preauricular region.
Patients allergic to contrast media.
Patients with bleeding disorders and on anticoagulant therapy
TMJ ARTHROGRAPHY
Norgaard (1940)
Indications:
Position and function of disk -pain and dysfunction-long standing
History of locking-persistent
Perforations of the disk and retrodiskal tissue.
Therapeutic :
To delineate loose bodies in the joint sp
Temporomandibular joint is the most complex and unique joint of the body and to understand its surgical anatomy is very important in the surgical management of its disorders .
TMJ is a ginglymo-diarthroidal joint that is freely mobile with superior and inferior joint spaces separated by articular disc.
The type of imaging technique depends upon the clinical problems associated, so either imaging of hard tissue (OSSEOUS) or soft tissue is desired.
Certain protocols are to be taken care before the imaging procedure:
the amount of diagnostic information available from particular imaging modality.
The cost of examination
The radiation dose
Ozempic: Preoperative Management of Patients on GLP-1 Receptor Agonists Saeid Safari
Preoperative Management of Patients on GLP-1 Receptor Agonists like Ozempic and Semiglutide
ASA GUIDELINE
NYSORA Guideline
2 Case Reports of Gastric Ultrasound
Title: Sense of Smell
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 primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
NVBDCP.pptx Nation vector borne disease control programSapna Thakur
NVBDCP was launched in 2003-2004 . Vector-Borne Disease: Disease that results from an infection transmitted to humans and other animals by blood-feeding arthropods, such as mosquitoes, ticks, and fleas. Examples of vector-borne diseases include Dengue fever, West Nile Virus, Lyme disease, and malaria.
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.
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
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
HOT NEW PRODUCT! BIG SALES FAST SHIPPING NOW FROM CHINA!! EU KU DB BK substit...GL Anaacs
Contact us if you are interested:
Email / Skype : kefaya1771@gmail.com
Threema: PXHY5PDH
New BATCH Ku !!! MUCH IN DEMAND FAST SALE EVERY BATCH HAPPY GOOD EFFECT BIG BATCH !
Contact me on Threema or skype to start big business!!
Hot-sale products:
NEW HOT EUTYLONE WHITE CRYSTAL!!
5cl-adba precursor (semi finished )
5cl-adba raw materials
ADBB precursor (semi finished )
ADBB raw materials
APVP powder
5fadb/4f-adb
Jwh018 / Jwh210
Eutylone crystal
Protonitazene (hydrochloride) CAS: 119276-01-6
Flubrotizolam CAS: 57801-95-3
Metonitazene CAS: 14680-51-4
Payment terms: Western Union,MoneyGram,Bitcoin or USDT.
Deliver Time: Usually 7-15days
Shipping method: FedEx, TNT, DHL,UPS etc.Our deliveries are 100% safe, fast, reliable and discreet.
Samples will be sent for your evaluation!If you are interested in, please contact me, let's talk details.
We specializes in exporting high quality Research chemical, medical intermediate, Pharmaceutical chemicals and so on. Products are exported to USA, Canada, France, Korea, Japan,Russia, Southeast Asia and other countries.
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
Acute scrotum is a general term referring to an emergency condition affecting the contents or the wall of the scrotum.
There are a number of conditions that present acutely, predominantly with pain and/or swelling
A careful and detailed history and examination, and in some cases, investigations allow differentiation between these diagnoses. A prompt diagnosis is essential as the patient may require urgent surgical intervention
Testicular torsion refers to twisting of the spermatic cord, causing ischaemia of the testicle.
Testicular torsion results from inadequate fixation of the testis to the tunica vaginalis producing ischemia from reduced arterial inflow and venous outflow obstruction.
The prevalence of testicular torsion in adult patients hospitalized with acute scrotal pain is approximately 25 to 50 percent
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
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
3. INTRODUCTION
Ankylosis in the Greek term for ‘‘stiff joint”
TMJ ankylosis is a distressing structural condition that involves pathologic changes in the
anatomic and physiologic integrity of the joint surfaces that result in limitations of
mandibular movement that vary from slight opening interference to nearly complete
inability to open the jaws accompanied by
• Difficulties in chewing and speech
• Poor oral hygiene
• Mandibular growth disturbances that interfere with normal social life
Reza Movahedet al, Management of Temporomandibular Joint Ankylosis; Oral
Maxillofacial Surg Clin N Am 27 (2015) 27–35
4. HISTORICAL PERSPECTIVES
Burton in 1826 described the treatment of ankylosis by the formation of artificial
joints
Verneuil in 1826 was the first to do gap arthroplasty
Humphry performed first condylectomy for ankylosis in 1854
In 1914, Murphy reported the use of autogenous graft as interposition after lysis
of TMJ ankylosis
Risdon applied free muscle to the problem in 1934
In 1942, Pickerill propounded that the ankylosed TMJ should be reconstructed by
means of cartilage graft
5. Gordon in 1955 used alloplastic material to replace TMJ disc after discectomy.
Georgiade first described the use of the dermis as a disc replacement in 1957.
The use of autogenous auricular cartilage as a replacement for the disc was first
introduced by Perko in 1973.
In 1990 Kaban gave protocol for the management of ankylosis which was
modified in 2009.
Wolford first used specific surgical protocol for management using TMJ prosthesis
in 1992
6. • Temporomandibular joint is a complex
structure composed of several components.
• It is a coumpound joint.
• The TMJ is a ginglymoarthrodial joint, a term
that is derived from ginglymus, meaning a
hinge joint, allowing motion only backward and
forward in one plane
• Aarthrodia, meaning a joint of which permits a
gliding motion of the surfaces.
• The right and left TMJ form a bicondylar
articulation and ellipsoid variety of the synovial
joints
ANATOMY
7. Articular Surfaces
Mandibular Component
• Consists of an ovoid condylar process seated atop a
narrow mandibular neck. It is 15 to 20 mm side to side
and 8 to 10mm from front to back
• The lateral pole of the condyle is rough, bluntly
pointed, and projects only moderately from the plane
of ramus, while the medial pole extends sharply
inward
• Condyle is rounded mediolaterally and convex
anteroposteriorly,
8. Cranial Component
• The articular surface (mandibular fossa) of the
temporal bone is situated on the inferior
aspect of temporal squama anterior to
tympanic plate.
• Articular eminence
• Articular tubercle
• Preglenoid plane
• Posterior articular ridge and the postglenoid
process
9. Articular Disk
• It is a biconcave fibrocartilaginous
structure located between the mandibular
condyle and the temporal bone.
• Its functions to accommodate a hinging
action as well as the gliding actions
between the temporal and mandibular
articular bone
• Divides the joint into a larger upper
compartment and a smaller lower
compartment
• Divided into an anterior band of 2 mm in
thickness, a posterior band 3 mm thick,
and thin in the centre intermediate band of
1 mm thickness.
10. Retrodiskal tissue
• Highly vascular and innervated tissue.
• Articular disk blends with it posteriorly
• It is a bilaminar zone.
• Superior retrodiskal lamina – attaches
to the tympanic plate and restricts disk
displacement during translatory
movement
• Inferior retrodiskal lamina – it connects
the articular disk to the posterior
margin of the condyle, serves as a
check to restrict extreme rotation of
the disk
13. • Ligaments provide stability to the joint
• The disc is attached to the condyle medially and laterally by collateral ligament
• Restricts the movement of the disc away from the condyle as the disc glides
anteriorly and posteriorly and also aids in hinging movement of condyle
• Capsular ligament thin loose envelope attachment above the circumference of the
mandibular fossa and articular tubercle below to the neck of the condyle
• Temporomandibular ligament arises from lateral border of articular eminence and
the zygomatic arch insert into posterior border of condylar head and limit the
protraction, inferior distraction and posterior movements of the condyle.
• Sphenomandibular ligament: originates from anterior process of malleus, tip of
pterygo tympanic fissure and spine of sphenoid and insert into lingula.
• Stylomandibuar ligament attaches to styloid process above and a posterior border
of ramus and accessory ligaments limits extreme of anterior movement of the
condyle in relation to fossa
14. Vascular supply
Branch of Superficial temporal artery runs deep to parotid, emerges behind
the neck of condyle
Branch of Transverse facial artery
Departs from the superficial temporal artery and travels across the face about
1.5 cm inferior to the zygomatic arch
Deep Auricular artery, Ascending pharyngeal artery.
Anterior tympanic artery
Branche of maxillary artery that enter the joint from the anterior and the medial
aspect.
15. Lubrication of the Joint
• The synovial fluid comes from two sources: first
• From plasma by dialysis, and second, by secretion from type A and B
synoviocytes with a volume of no more than 2 ml within each TMJ
• Upper compartment could hold approximately 1.2 ml of fluid
• Lower has a capacity of approximately 0.5 – 0.9 ml
16. Surgical anatomy
Talebzadeh et al
Outer aspect of zygomatic arch to middle meningeal artery – 31mm
Antero posterior distance from middle meningeal artery to glenoid fossa – 2.4mm
Zygomatic arch to carotid artery – 37.5mm
Zygomatic arch to IJV – 38.3mm
Height of glenoid fossa to mandibular nerve – 9.2mm
17. Facial nerve & TMJ
• Distance from the lower point of
the external bony auditory canal to
the bifurcation: 1.3 to 2.8
• Posterior glenoid tubracle to the
bifurcation: 2.4 to 3.5 cm
• The most variable measurement
was the point at which the upper
trunk crosses the zygomatic arch
ranging from 0.8 to 3.5cm to the
most anterior portion of the bony
external auditory canal.
18. Etiology of Ankylosis
Trauma
• At birth – forceps delivery
• Heamarthrosis (direct/indirect
trauma)
• Condylar fracture –intracapsular/
extracapsular
• Glenoid fossa fracture ( rare )
Infections
• Otitis media
• Parotitis
• Furuncle
• Abscess around the joint
• Osteomyelitis of the jaw
• Actinomycosis
Shashikiran et al; Management of TMJ ankylosis in growing children; J of indian Pedo prev dent 2005
20. Other causes
• Bifid condyle
• Prolonged trismus
• Prolonged immobilization
• Idiopathic
• Burns
• Tumors
Shashikiran et al; management of TMJ ankylosis in growing children; J indian Pedo prev dent 2005
21. Etiology of pseudoankylosis
• Depressed zygomatic arch
• Fracture dislocation of condyle
• Hypertrophy of coronoid process
• Fibrosis of temporalis muscle
• Myositis ossificans
• Scar contracture
• Tumour of condyle or coronoid
25. Infection
Organisms may reach the joint by
Hematogenous
Contiguous
Direct inoculation
Organisms responsible for infection of the TMJ-staphylococci, streptococci and
occasionally gonococci.
26. • Markey et al experimented on young moneys to create TMJ ankyloses.
• He attempted a surgical intra capsular fracture followed by IMF.
• It was concluded that trauma followed by long term fixation had no
effect in promoting ankylosis or significant limitation of jaw movement.
• It is suggested that when considering the role of trauma in the aetiology
of ankylosis, attention be given to those factors which may complicate
an existing trauma.
Ronald J. MARKEY, Bryce E. POTTER, Ben C. MOFFETT Condylar Trauma and Facial Asymmetry: An Experimental
Study J, max.-fac. Surg. 8 (1980) 38-51
27. • Hohl et al. subjected the condylar fractures in monkeys with various
modalities such as mechanical damage, chemical damage and bone
grafting and bacterial infection.
• They concluded that the mechanical damage coupled with bone grafting
significantly induced TMJ ankyloses.
Thomas H. Hohl, Peter A. Shapiro, Benjamin C. Moffett, Alison Ross Experimentally Induced Ankylosis and Facial
Asymmetry in the Macaque Monkey .J max.-fac. Surg. 9 (1981) 199-210
28. • Using sheep models Miyamoto et al concluded when mandibular
movements are restricted the chance of TMJ ankyloses increased.
• He also showed the disc guards the TMJ from the occurence of
intracapsular fibrous ankyloses
Hizuru Miyamoto et al The Effect of Autogenous Costochondral Grafts on Temporomandibular Joint
Fibrous and Bony Ankylosis: A Preliminary Experimental Study., J Oral Maxillofac Surg 64:1517-1525, 2006
30. Kazanjian (1938):
a. True ankylosis:
Any condition that produced fibrous or bony adhesions
between the articular surfaces of the TMJ
b. False ankylosis:
Condition resulting from pathologic condition outside of the
joint that resulted in limited mandibular mobility
31. Joram Raveh and Thierry Vuillemin Classification
Class 1 ankylotic bony tissue limited to the condylar process and articulate fossa
Class 2 the bone mass extends out of the fossa involving the medial aspect of the skull
base upto the carotid jugular vessels
Class 3 extension and penetration into the middle cranial fossa
Class 4 combination of class 2 and class 3
JORAM RAVEH et al., Temporomandibular Joint Ankylosis: Surgical Treatment and Long-Term Results, J Oral
Mamllofac Surg 47:900-906. 1969
32. Rowe’s Modification (1986):
Based on location:
• Intra articular
• Extra articular
Type of tissue involved
• Bony
• Fibrous
• Fibro osseous
Extent of fusion
• Complete
• Incomplete
35. Topazian
Proposed a three-stage classification to grade complete ankylosis as
follows:
Stage I ankylotic bone limited to the condylar process;
Stage II ankylotic bone extending to the sigmoid notch;
Stage III ankylotic bone extending to the coronoid process.
Richard G.Topazian Discussion: A Protocol for Management of Temporomandibular Joint Ankylosis J
Oral Maxillofac Surg 48:1152, 1990
36. Type I: The condyle can be identified even though flattened, irregular, partially
resorbed.
Its usually medially angulated.
The articular fossa is correspondingly irregular, shallow or deep and usually
sclerosed; the sclerosis extended to adjacent areas of the temporal bone.
There is a mild to moderate amount of bone formation.
This extended from the lateral superior aspect of the ramus to the squamous
temporal bone and / or zygomatic arch, frequently encroaching on the lateral
part of the articular fossa.
Classification of TMJ altered morphology based on CT-
scan:
Sashi Aggarwal, et el ; Bony ankylosis of the temporomandibular joint: A computed tomography study; oral surgery
oral pathology oral medicine 1990 69:1128-132
37. Type II: The joint architecture is completely disrupted with no recognizable
condyle or articular fossa.
There is a large mass of new bone, funnel shaped, extending from the
thickened ramus to the grossly sclerosed and irregular base of the skull.
Sashi Aggarwal, et el ; Bony ankylosis of the temporomandibular joint: A computed tomography study; oral
surgery oral pathology oral medicine 1990 69:1128-132
38. Modified classification based on CT-scan:
Class I:
Includes unilateral and bilateral fibrous ankylosis.
The condyle and glenoid fossa retain their original shape, and the maxillary artery is
in normal anatomical relation to the ankylosed mass.
Class II:
There is unilateral or bilateral bony fusion between the condyle and the temporal
bone.
The maxillary artery lies in normal anatomical relation to the ankylosed mass.
El-Hakim etal; Imaging of temporomandibular joint ankylosis. A new radiographic classification; Dentomaxillofacial Radiology
(2002) 31, 19±23.
39. Class III:
The distance between the maxillary artery and the medial pole of the mandibular condyle
is less on the ankylosed side than in the normal side. This is best seen on coronal CT.
Class IV:
The ankylosed mass appeared fused to the base of the skull and there is extensive bone
formation, especially from the medial aspect of the condyle to the extent that the
ankylosed bony mass is in close relationship to the vital structures at the base of the skull
such as the pterygoid plates, the carotid and jugular foramina and foramen spinosum
No joint anatomy can be defined from the radiograph. This is best visualized on axial CT.
El-Hakim etal; Imaging of temporomandibular joint ankylosis. A new radiographic classification; Dentomaxillofacial
Radiology (2002) 31, 19±23.
40. Ninth Shangai Classification
Type A1 fibrous ankylosis without bony fusion of the joint
Type A2 ankylosis with bony fusion on the lateral side of the joint, while the residual
condyle fragment is bigger than 0.5 cm of the condylar head in the medial side
Type A3 similar to A2, but the residual condylar fragment is smaller than 0.5 cm of
the condylar head.
Type A4 is ankylosis with complete bony fusion of the joint
Dongmei He et al., Traumatic Temporomandibular Joint Ankylosis: Our Classification and Treatment Experience J
Oral Maxillofac Surg 69:1600-1607, 2011
41. Gross facial asymmetry
Deviation to affected side
Hypoplastic mandible on affected side
Prominent Antegonial notch
Convex profile
No cervico mental angle
Condylar movements absent/ reduced on affected side
Microgenia
UNILATERAL ANKYLOSIS
42. Intra oral
• Occlusal cant
• Class II malocclusion
• Cross bite may be seen
• Periodontal diseases
• Multiple impacted/supernumerary teeth
• Decreased interincisal opening
43. BILATERAL ANKYLOSIS
• Mouth opening decreased or absent
• Mandible is micrognathic, retrognathism
• Bird face deformity (Andy gump)
• Neck chin angle is reduced or absent
• Multiple carious tooth
• Convex profile
• Upper incisors often protrusive
• No joint movements palpated
• Markedly elongated coronoid process
• Double chin
44. IMAGING MODALITIES
• OPG
• Trans cranial,
transpharengeal
• Trans maxilary/ trans orbital
• Reverse towns
• Lateral oblique
• CT
• MRI
• CBCT
• Stereolithographic models
45. Panoramic views
• Do not reveal the nature & extent of the pathology, in particular the medial &
lateral extension of the ankylosed bony mass, & its relation to surrounding
vital structures.
46. Coronal CT showing bony exostoses in the glenoid fossa superiorly as well as
medial on the condylar head, resulting in bony ankylosis
El-Hakim etal; Imaging of temporomandibular joint ankylosis. A new radiographic
classification; Dentomaxillofacial Radiology (2002) 31, 19±23.
47. 3D CT of an ankylosed joint with an elongated coronoid
process that projects clearly under the zygomatic arch
El-Hakim etal; Imaging of temporomandibular joint ankylosis. A new radiographic
classification; Dentomaxillofacial Radiology (2002) 31, 19±23.
49. Kaban’s protocol
1. Aggressive resection
2. Ipsilateral coronoidectomy
3. Contralateral cornoidectomy (if necessary)
4. Lining of TMJ with temporalis fascia or cartilage
5. Reconstruction of ramus using costochondral graft
6. Rigid fixation of the graft
7. Early mobilization and aggressive physiotherapy
Leonard .B Kaban : protocol for the management of the temporomandibular joint ankylosis JOMS 48; 1145-1151 ;1990
50. Kaban ; protocol for the management of tmj ankylosis in children joms 67:1966-1978,2009
51. Intubation Techniques
• Blind awake intubation
• Fibreoptic guided intubation
• Retrogade intubation
• Tracheostomy
• Light inhalation anesthesia with speedy release of ankyloses followed
by intubation
53. Preauricular incision- Dingman
• The preauricular approach can be used to access and treat fractures in the
mandibular condylar head and neck region.
• Many surgeons perform temporal mandibular joint (TMJ) surgery and routinely
use this incision to access the superior portion of the mandibular condylar process.
54. Blair and Ivy in 1936-
inverted hockey stick
Thoma in 1958- angulated
vertical incision
55. Al-Kayat & Bramley in 1979-
modified preauricular approach
Popowich and Crane in
1982- question mark
56. Submandibular approach
Atleast 2cm below mandible
In cases where access through preauricular
approach alone may be unsatisfactory
Postramal incision (Hinds)
Incision runs parallel and posterior to the
ascending ramus at a distance of 2cm
57. Coronal approach
Versatile approach to the upper & middle
regions of the facial skeleton
Minimum complications
Scar hidden within the hairline
Endaural incision
Short facial skin incision with extension into the
EAM
Excellent cosmetics
Limited access
Possibility of meatal stenosis
58. Postauricular approach
Excellent exposure of the entire joint
Ability to camouflage the scar in patients
Rhytidectomy approach- Zide & Kent
The facelift approach provides the same exposure
as the retromandibular and preauricular accesses
combined
59. History
A submandibular, retromolar approach to TMJ was described by Risdon in 1937
A combined preauricular and coronal approach to TMJ by Poswillo in 1974
The preauricular approach with temporal extension by Al Khayat and Bramley in 1981
60. Maximize exposure
Prevent Facial nerve damage
Prevent injury to major vessels
Prevent parotid gland damage
Maximize use of skin creases
Objectives
61. TREATMENT OPTIONS
Gap arthroplasty
Interpositional arthroplasty
Total joint reconstruction (TJR)
Reza Movahedet al, Management of Temporomandibular Joint Ankylosis; Oral Maxillofacial Surg Clin N Am 27 (2015)
27–35
62.
63. Ankylosis
Class I Class II Class III Class IV
Meniscus intact Meniscus lost
Gap
arthroplasty
with 3 – 5
mm gap
Interpositional
material like
temporalis
fascia or silastic
etc can be used
Remove bony bridge
(usually
extracapsular),
Functional
components of joint
intact
Horizontal cuts to
remove a chunk of
ankylosed mass
Sawhney 1986
64. El – Sheikh 1999
Radical resection of the ankylosed mass via wide surgical exposure.
Release of pterygo masseteric sling with resection of the condylar process.
Restoration of the vertical ramal height and condylar head by CCG.
Simultaneous correction of jaw bone deformities at the same time as release of the
ankylosis.
Careful selection of the patients who are expected comply with postoperative
functional rehabilitation and regular follow up atleast 1 year.
65. Gap arthroplasty
Verneuil in 1826 was the first to do gap arthroplasty.
The ankylotic mass is shaved to a flat ramus surface.
If we find a cleavage line, it is used as the superior bony cut plane.
If there is no cleavage line, an imaginary line through the lower border of the zygomatic
arch is considered.
A gap 7-9 mm wide is then created and measured with the mandible in a resting position.
If the disc is present in good condition it is used to line the glenoid fossa at the gap.
Ahmed; Conservative gap arthroplasty in temporomandibularankylosis not involving the sigmoid notch:a selected age group
study; British Journal of Oral and Maxillofacial Surgery (2016) 1–6
66.
67. Advantages
Simplicity
Short operating time
Pseudo-articulation
Short ramus height
Failure to remove all bony disease
Development of open bite
Recurrent ankylosis (60%)
Disadvantages
Vasconcelos et al; Treatment of temporomandibular joint ankylosis by gap arthroplasty ; Med Oral Patol Oral Cir
Bucal 2006;11:E66-9.
68. Interpositional arthroplasty
First introduced by Verneuil in 1860
It minimizes reduction in the vertical
height of ramus and reduce the risk of
relapse and malocclusion
Junli Ma et al; Interpositional arthroplasty versus reconstruction arthroplasty for tmj ankylosis: A systematic review and
meta-analysis; J of Cranio-Maxillo-Facial Surgery 43 (2015) 1202e1207
70. Ideal requisites of interpositional materials
Cost effective
Cosmetic consequences of harvesting should be minimal
Stable under masticatory force
Minimal risk of infection
Obliterate dead space
Prevent recurrence caused by heterotrophic calcification
Basal et al; Interpositional arthroplasty versus reconstruction arthroplasty for temporomandibular joint ankylosis: A
systematic review and meta-analysis BJOMS 2015
71. Disadvantages of interpositional materials
Alloplastic materials
• Foreign body reaction
• Instability
• Infection
• Extrusion
Autogenous materials
• All have some donor site morbidity
• Muscle flaps tend to contract and become fibrous
• Cartilage may calcify
• Thin grafts such as skin, dermis and auricular cartilage may not maintain the height of
the ramus adequately, and may perforate under pressure from the condyle
Lokesh Babu et al; Is aggressive gap arthroplasty essential in the management of tmj ankylosis?—a prospective
clinical study of 15 cases; BJOMS 51 (2013) 473–478
72. Temporalis fascia
The deep temporal fascia is supplied by the middle temporal artery, a branch of the superficial
temporal artery.
A temporal fascia (vascularised) flap is a locally available axial pattern flap that has fewer
chances of absorption and fibrosis.
Advantages :
Relatively simple and easy to raise
Rich blood supply
Minimal donor site morbidity
The donor site was close at hand, and it was always available
Lokesh Babu etal; Is aggressive gap arthroplasty essential in the management of temporomandibular joint ankylosis?—a
prospective clinical study of 15 cases; BJOMS 51 (2013) 473–478
73. K. Su-Gwan: Treatment of temporomandibular joint ankylosis with temporalis muscle and fascia flap. Int. J. Oral
Maxillofac. Surg. 2001; 30: 189–193.
74. An L-osteotomy is used to create the transport disc.
The vertical limb of the “L” parallels the vector that will take
the disc into the glenoid fossa.
The superior portion of the disc is rounded to make a new
articular surface.
A small portion of the osteotomy is left incomplete to stabilize
the disc during placement of the distractor.
The vascular attachments on the medial aspect of the disc are
maintained.
Harry C. Schwartz, and Robert J. Relle, Distraction Osteogenesis for Temporomandibular Joint Reconstruction J Oral
Maxillofac Surg 66:718-723, 2008
Distraction Osteogenesis for TMJ Reconstruction
75. A distractor length ranged between 13 and 30
mm is used.
Attachment plates are chosen and trimmed
according to the anatomy. At least 3 screws are
placed in each plate.
The dead space is filled with a fat graft (left) or
temporalis flap, to inhibit heterotopic bone
formation.
Harry C. Schwartz, and Robert J. Relle, Distraction Osteogenesis for Temporomandibular Joint Reconstruction J Oral
Maxillofac Surg 66:718-723, 2008
76. The distraction rod is brought through the skin of the
neck through a separate stab incision.
After a latency period of 7 days, distraction of 0.5 mm is
carried out twice daily.
Mobilization is begun immediately and maintained
throughout distraction.
This is a major advantage of the technique.
Harry C. Schwartz, and Robert J. Relle, Distraction Osteogenesis for Temporomandibular Joint Reconstruction J
Oral Maxillofac Surg 66:718-723, 2008
77. After 3 months, the distractor is
removed through the same
submandibular incision. The superior
attachment plate has moved far from
the incision and is left in place. Callus
in the distraction gap has formed
woven bone, which is remodelling into
solid lamellar bone.
Distraction is discontinued when the
occlusion reaches the desired
position. Overcorrection may be
used. The activation rod is removed
or cut short below the skin. The
distractor acts as a rigid fixator while
callus produces new bone in the
distraction gap.
Harry C. Schwartz, and Robert J. Relle, Distraction Osteogenesis for Temporomandibular Joint Reconstruction J Oral
Maxillofac Surg 66:718-723, 2008
78. Advantage of DO
Eliminates donor site morbidity
Allows immediate mobilization of the jaw
Relapse rate is much less
Early mobilization
Kaban et al; A Protocol for Management of Temporomandibular Joint Ankylosis in Children; J Oral Maxillofac Surg 67:1966-
1978, 2009
Disadvantage
Additional operations might be necessary to
correct any residual asymmetry after the end of
growth
Duration is longer
Patients compliance
Device failure
Infection
79. Residual ankylotic mass
The reconstruction of the condyle with
ankylotic bone was first described by
Gunaseelan in 1997
Bansal etal; Coronoid process and residual ankylotic mass as anautograft in the management of ankylosis of
thetemporomandibular joint in young adolescent patients:a retrospective clinical investigation ; BJOMS 54 (2016) 280–
285
80. Sliding reconstruction of the condyle using posterior border of mandibular
ramus in TMJ ankylosis
Vertical osteotomy was performed on the
proximal posterior border of the mandibular
ramus till 1.0 cm above the angle and the
osteotomized segment was moved up.
The ipsilateral autogenous coronoid was
implanted in the gap and fixed with titanium
miniplates.
Y. Liu, A. et al: Sliding reconstruction of the condyle using posterior border of mandibular ramus in patients with temporomandibular
joint ankylosis. Int. J. Oral Maxillofac. Surg. 2011; 40: 1238–1245.
81. The bony block was resected and the
glenoid fossa was recreated.
Vertical osteotomy was performed on the
entire posterior border of the mandibular
ramus and then moved up.
Fixation of the bone graft with titanium
miniplates and resection of prominent
antegonial notch.
Y. Liu, A. et al: Sliding reconstruction of the condyle using posterior border of mandibular ramus in patients with
temporomandibular joint ankylosis. Int. J. Oral Maxillofac. Surg. 2011; 40: 1238–1245.
The bony block and prominent antegonial notch.
82. Buccal fat pad
The long-term fate of pedicled buccal pad fat used for interpositional arthroplasty in TMJ ankylosis; J of Plast, Reconst &
Aesthetic Surgery (2012) 65, 1468e1473
Advantages
Less chance of resorption
Good long term interpositional
material
83. Coronoid process- Youmans and Russell
1969
In patients with ankylosis of the TMJ the coronoid is thicker than the normal one,
so it can provide sufficient strength for loading of the TMJ after condylar
replacement.
Avoids a second surgical site and the related donor-site complications, which
facilitated the operation and reduced the intervention.
Less resorption
Zhu et al; Free grafting of autogenous coronoid process for condylar reconstruction in patients with
temporomandibular joint Ankylosis; (Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2008;106:662-7)
84. A: The coronoid process prepared for grafting. B: The use of native articular
disc as an interpositional tissue (arrow). C: The fixation of coronoid process.
Zhu et al; Free grafting of autogenous coronoid process for condylar reconstruction in patients with temporomandibular
joint Ankylosis; (Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2008;106:662-7)
85. Fat Graft
(A) Marked periumbilical incision for harvest of
abdominal fat graft.
(B) Undermining of skin and fat before harvest.
(C) Composite harvest of abdominal fat.
(D)Exposure of graft site for circumferential
augmentation of fat graft.
(E) Adaptation of fat graft before closure
Reza Movahed et al, Management of Temporomandibular Joint Ankylosis; Oral Maxillofacial Surg Clin N Am 27 (2015)
27–35
86. Indomethacin in improving mouth opening and prevent re-ankylosis
in TMJ ankylosis
Indomethacin is a non-selective inhibitor of cyclooxygenase (COX) 1 and 2, enzymes that participate in
prostaglandin synthesis from arachidonic acid.
Indomethacin is used most commonly for the treatment of inflammation and pain resulting from
rheumatic disease.
Orthopaedic surgeons have been using Indomethacin to prevent the formation of heterotopic bone after
hip replacement surgery.
Studies have demonstrated that Indomethacin is a potent inhibitor of local remodelling and repair of bone
after trauma.
TMJ ankylosis in children is a challenge to treat. Surgical correction may show satisfactory result but
incidence of recurrence is high.
Initial results for the long term use of Indomethacin have been favourable, providing a solution for many
patients however further research is warranted
87. TMJ RECONSTRUCTION
Goals
Restoration of normal joint function
Restoration normal posterior vertical dimensions and length
Stable skeletal occlusal relationship
Maintenance of facial symmetry
Lifetime maintenance of restored function, comfort and esthetics
90. CCG
Advantages:
Most widely used
Has a cartilage cap, mimicking both the
bone and cartilaginous components
Has intrinsic growth potential
Easy accessibility and adaptation
Gross anatomical similarity to the
mandibular condyle
Limitations:
Unpredictable growth
Poor bone quality
Possible separation of cartilage from bone
Donor-site complications:
Pleural tear
Pneumothorax
Pleural effusion
91. Sternoclavicular
Advantages
Similar anatomical and
physiological characteristics.
Consists of a cartilaginous cap.
Option for a whole joint graft.
Has the potential for growth.
Probability of regeneration at
donor site
Donor site
complications:
Damage to the great
vessels.
Instability of the clavicle
under stress with resulting
shoulder instability.
Clavicle fracture.
92. Metatarsophalangeal
Advantages:
Combination of articular cartilage and
bone.
Fitting anatomy because of small size.
Has potential for growth.
Donor-site complications:
Aesthetic loss of a toe.
MTP joint being a simple hinge joint does
not follow the same movements as the
TMJ
93. Fibula
Advantages
Tubular in shape and densely
cortical.
Vascularized graft has better
survival rate.
More suitable for large
mandibular defects
Limitations
Lacks articular cartilage
Donor-site complications
Ankle stiffness, instability and
weakness
Numbness of the lateral side of
the leg
Pedal ischaemia and foot
oedema
94. Iliac crest
Advantages:
Has a cartilage cap, mimicking both the
bone and cartilaginous components.
Has potential for growth
More suitable for large mandibular defects
Donor-site complications:
Altered gait
Poor scar
Ilium fracture
Peritonitis
Retroperitoneal haematoma
96. Protocol for joint replacement
Release the ankylosed joint.
Remove the heterotopic and reactive bone with thorough debridement.
Reconstruct the TMJ with a total joint prosthesis.
Pack a fat graft around the articulation area of the prosthesis.
Perform indicated orthognathic surgery in a single surgery.
Wolford et al; Temporomandibular Joint Ankylosis Can Be Successfully Treated With TMJ Concepts Patient-Fitted Total
Joint Prosthesis and Autogenous Fat Grafts; j.joms.2016.01.017
98. Relative contraindications
Patient age
Lack of understanding of the patient
Uncontrolled systemic disease
Allergic to materials used in devices
Active infection at implantation site
99. Advantages
Physical therapy can begin immediately.
No need for second donor site.
Reduced surgical time.
Alloplasts – mimic normal anatomic contours, better adapted to the bony surfaces.
Stable occlusion post-operatively.
Decreased hospital stay.
Opportunity to manipulate prosthesis design to discourage heterotrophic bone formation
Wolford et al; Temporomandibular Joint Ankylosis Can Be Successfully Treated With TMJ Concepts Patient-Fitted Total Joint
Prosthesis and Autogenous Fat Grafts; j.joms.2016.01.017
100. Disadvantages
Cost of prosthesis
Material wear and failure
Long term stability
Inability to follow patients growth
Potential for severe giant cell reactions
Fit limitations of stock prosthesis
Muralee Mohan et al; RECONSTRUCTION OF CONDYLE FOLLOWING SURGICAL CORRECTION OF TEMPOROMANDIBULAR
JOINT ANKYLOSIS: CURRENT CONCEPTS AND CONSIDERATIONS FOR THE FUTURE; NUJHS Vol. 4, No.2, June 2014, ISSN 2249-
7110
102. Biomet Lorenz Prosthesis
The mandibular component is manufactured from Co-Cr alloy with a roughened
titanium plasma coating on the host bone side of the ramal plate
The condylar component is secured to the ramus with self retaining, cross drive 2.7-
mm self-tapping bone screws made of titanium alloy
The ramus of the mandibular component is currently manufactured in lengths of 45
mm, 50 mm, and 55 mm
The fossa component is manufactured from a specific grade of ultrahigh molecular
weight polyethylene called Arcom manufactured by Biomet.
The fossa is fixed to the zygomatic arch with self-retaining, self tapping 2-mm cross
drive screws
Muralee Mohan et al; RECONSTRUCTION OF CONDYLE FOLLOWING SURGICAL CORRECTION OF TEMPOROMANDIBULAR
JOINT ANKYLOSIS: CURRENT CONCEPTS AND CONSIDERATIONS FOR THE FUTURE; NUJHS Vol. 4, No.2, June 2014, ISSN 2249-
7110
104. Kent-Vitek Total Prosthesis
In the early 1970s Kent and colleagues developed a glenoid
fossa prosthesis
The original VK-1 fossa had an articulating surface composed of
poly tetrafluoro ethylene (PTFE).
The fossa was revised and called the VK-2 fossa, and its
articulating surface was composed of ultra-high molecular -
weight polyethylene (UHM-WPE) .
The flange of the prosthesis was secured to the zygomatic arch
with screws.
The condylar prosthesis was constructed of chromium cobalt
with a layer of Proplast on the inner surface of the ramal flange
to encourage rapid ingrowth of both hard and soft tissues
Complications included glenoid fossa resorption, especially in
patients who had undergone ramal lengthening
105. Christensen
The Christensen TMJ fossa eminence prosthesis
(FEP) is designed to be used alone as a partial joint
for treatment of
Severe internal derangement
Adhesions
Disc perforation
Ankylosis
The condylar prosthesis is always used in
conjunction with a FEP and constitutes a total joint
replacement.
Muralee Mohan et al; RECONSTRUCTION OF CONDYLE FOLLOWING SURGICAL CORRECTION OF TEMPOROMANDIBULAR
JOINT ANKYLOSIS: CURRENT CONCEPTS AND CONSIDERATIONS FOR THE FUTURE; NUJHS Vol. 4, No.2, June 2014, ISSN 2249-
7110
106. Complications of TMJ surgery
Intra op
Hemorrhage
Damage to external acoustic meatus
Parotid gland fistula
Damage to auriculotemporal nerve
Damage to zygomatic and temporal
branch of facial nerve
107. Post op
Transient facial nerve weakness
Infection
Auriculotemporal nerve injury- Frey’s syndrome
108. Long term complication
Partial graft resorption
Loose hardware
Facial scarring
Condylar overgrowth
Limited mouth opening
Reankylosis
109. References
• Leonard B Kaban, David H Perrott, Keith Fisher JOMS; 48;
1990: 1145-51
• New Perspectives In The Management Of Cranio-
Mandibular Ankylosis. P C Salins, IJOMS, 2000; 29; 337-40
• Bone Ankylosis of the TMJ. A CT study Sashi Aggarwal,
Sima Mukhopadhyaya, Manorama berry, OOO; 1990; 69:
128-32
• Imaging of TMJ; A New Radiographic Classification. IE El-
Hakim,S A Metwalli Dentomaxillofacial Radiology 2002; 31;
19-23.
110. • Y. Liu, A. Khadka, J. Li, J. Hu, S. Zhu, Y. Hsu, Q. Wang, D. Wang:
Sliding reconstruction of the condyle using posterior border of
mandibular ramus in patients with temporomandibular joint
ankylosis. Int. J. Oral Maxillofac. Surg. 2011; 40: 1238–1245.
• Harry C. Schwartz, and Robert J. Relle, Distraction
Osteogenesis for Temporomandibular Joint Reconstruction J
Oral Maxillofac Surg 66:718-723, 2008
• R. F. Elgazzar, A. I. Abdelhady, K. A. Saad, M. A. Elshaal, M. M.
Hussain, S. E. Abdelal, A. A. Sadakah: Treatment modalities of
TMJ ankylosis: experience in Delta Nile, Egypt. Int. J. Oral
Maxillofac. Surg. 2010; 39: 333–342.
• Zhu et al; Free grafting of autogenous coronoid process for
condylar reconstruction in patients with temporomandibular
joint Ankylosis; (Oral Surg Oral Med Oral Pathol Oral Radiol
Endod 2008;106:662-7
111. • Wolford et al; Temporomandibular Joint Ankylosis Can Be
Successfully Treated With TMJ Concepts Patient-Fitted Total
Joint Prosthesis and Autogenous Fat Grafts;
j.joms.2016.01.017
• Kaban ; protocol for the management of tmj ankylosis in
children joms 67:1966-1978,2009
• K. Su-Gwan: Treatment of temporomandibular joint
ankylosis with temporalis muscle and fascia flap. Int. J. Oral
Maxillofac. Surg. 2001; 30: 189–193.
• H. Matsuura, H. Miyamoto, N. Ogi, K. Kurita, A. N. Goss The
effect of gap arthroplasty on temporomandibular joint
ankylosis: an experimental study Int. J. Oral Maxillofac.
Surg. 2001; 30: 431–437
• Muralee mohan et al; Reconstruction of condyle following
surgical correction of temporomandibular joint ankylosis:
current concepts and considerations for the future; nujhs
vol. 4, no.2, june 2014, ISSN 2249-7110
112. • Su-Xia Liang et al; FGF-21 may be a potential novel drug
for preventing the development of traumatic TMJ bony
ankylosis; J of Med Hypo and Ideas (2014) 8, 23–26
• Li Wu Zheng,Li Ma,Xiao Jian Shi,Roger A. Zwahlen, and Lim
Kwong Cheung, Comparison of Distraction Osteogenesis
Versus Costochondral Graft in Reconstruction of
Temporomandibular Joint Condylectomy With Disc
Preservation J Oral Maxillofac Surg 69:409-417, 2011
• Gururaj Arakeri,Atul Kusanale,Pathogenesis of the post
traumatic ankylosis of the temporomandibular joint;BJOMS
2010
• Tae-Geon Kwon,Hyo-Sang Park, Jong-Bae Kim and Hong-In
Shin;staged surgical treatment for TMJ ankylosis-intraoral
distraction after temporalis muscle flap reconstruction J Oral
Maxillofac Surg 64:1680-1683, 2006
113. • Jiewen Dai et al; Injection of botulinum toxin A in lateral
pterygoid muscle as a novel method for prevention of
traumatic temporomandibular joint ankylosis; J of Med
Hypotheses and Ideas (2015) 9, 5–8
• M. TURCO,M. DI COSOLA,F. FACCIONI,R. CORTELAZZI
Treatment of severe bilateral temporomandibular joint
ankylosis in adults: our protocol MINERVA STOMATOL
2007;56:181-90
• Thapliyal.gc, Suresh Menon ; Management of TMJ ankylosis
JOMS 2008. Vol7:No4.
• Sanjeev kumar , Vishal Bansal ; An effective intra op method
to control bleeding from vessels medial tp the TMJ JOMS
8(4):371
• Syed Sirajul Hassan,Manjuntha Rai;Treatment of a long
standing bilateral ankylosis with condylar prosthesis: JOMS
2013 12(3):343-347
114. • Shah F. et al; Anaesthetic considerations of temporomandibular joint Ankylosis
with obstructive sleep apnoea : a case report; J Indian Sot Pedo Prev Dent March
2002
• Ayman; Outcome of Surgical Protocol for Treatment of TMJ Based on the
Pathogenesis of Ankylosis and Re-Ankylosis.; J Oral Maxillofac Surg 73:2300-2311,
2015
• Surgery of the tmj – david alexander keith
• Oral and maxilofacial infections – topazian
• Text book of oral medicine – burkett.
• Temporomandibular disorders – kaplan
• Maxillofacial surgery – peter wardbooth
Editor's Notes
Upper compartment : btw articular disc and temporal surface is glingglymoid. Permits hing motion or rotatory
Lowrer compartment: btw the condyle and the articular disc is arthrodial. Permits sliding or translator motions.
Like all the other synovial joints it has a fibrous capsule and a synovial membrane which is lubricated by a synovial fluid
The articular surface of mandibular component includes the mandibular condyle
The articulating surface of the temporal bone is composed of concave articular glenoid fossa and convex articular eminence.
Ligaments provide stability to the joint
The disc is attached to the condyle medially and laterally by collateral ligament
Restricts the movement of the disc away from the condyle as the disc glides anteriorly and posteriorly and also aids in hinging movement of condyle
Capsular ligament thin loose envelope attachment above the circumference of the mandibular fossa and articular tubercle below to the neck of the condyle
Temporomandibular ligament arises from lateral border of articular eminence and the zygomatic arch insert into posterior border of condylar head and limit the protraction, inferior distraction and posterior movements of the condyle.
Sphenomandibular: originates from anterior process of malleus, tip of pterygo tympanic fissure and spine of sphenoid and insert into lingula.
Stylomandibuar ligament attaches to styloid process above and a posterior border of ramus and accessory ligaments limits extreme of anterior movement of the condyle in relation to fossa
Primary by maxillary artery and superficial temporal artery
Venous drainage superficial temporal vein, maxillary plexus and posterior venous plexus
Nerve: auriculo temporal, maxillary and temporal
Odserved that distance from the lower point of the external bony auditory canal to the bifurcation: 1.3 to 2.8
Posterior glenoid tubracle to the bifurcation: 2.4 to 3.5 cm
The most variable measurement was the point at which the upper trunk crosses the zygomatic arch rang from 8 to 3.5cm to the most anterior portion of the bony external auditory canal.
In child trauma to the condyle results in an intracapsular fracture and haemarthrosis with highly osteogenic tissues, the fibro osseous mass may result in ankylosi. in adult trauma is transmitted along the long axis of the mandible results in a fracture dislocation of the condyle
Type I: Decreased joint space with fibrous adhesion. Type II: decrease joint space with dense fibrous adhesion, which also exhibits lateral lipping and bony bridging, type III: Broad bony bridging from the lateral ramus to the zygomatic arch. Type IV: Complete bony fusion
Cervico mental angle 105- 120 degrees usually 90
Transpharengeal mcqueen dell
lempert
explain in board
Rationale for placing the fat graft is to obliterate the dead space, thus preventing the formation of subsequent organisation of a haematoma, thereby preventing reankylosis. It has body and four processes (buccal, pterygoid,superficial and deep temporal). Blood supply: the facial, transverse fascial and IMA.VOLUME 9.6ML(8.33- 11.9ml)
Rt hypochondrium epigastric left hypo
Rt lumbar umbilical left lumbar
Right iliac hypogastrium lt iliac
Graft is similar in its structural and physical properties of that of condyle. Concept is transplanting of growth center. Skin, subcutenious tissue, rectus and pectoralies muscle, periosteum
SCJ is very similar morphologically and histologically to the TMJ throughout the growth.the head of the clavicle contain the layer of cartilage that are very similar to mandibular condyle.
Peroneal artery and venac comitantes. The fibular reconstruction in case pertaining to TMJ ankylosis has not been reported so far, so this does not seem to be the first option for condylar reconstruction in TMJ ankylosis.
Main advantage is vertical growth pattern of the illium is converted in the graft to a multidirectional pattern, to be adaptive to the functional demand of the tmj restoring the normal growth of the tmj