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.
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. :)
orthognathic surgery is very intresting and well knowing branch in oral surgery ....this presentation is dealing with jaw correction surgery in upper jaw.
Anoverview of TMD'S categories and main types of interocclusal appliances( occlusal splints ) used during the management of these musculoskeletal disorders .
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. :)
orthognathic surgery is very intresting and well knowing branch in oral surgery ....this presentation is dealing with jaw correction surgery in upper jaw.
Anoverview of TMD'S categories and main types of interocclusal appliances( occlusal splints ) used during the management of these musculoskeletal disorders .
Temporomandibular joint, a facial joint commonly undergoes internal derangement due to the abnormal position of the articular disc in relation to the condyle. Internal derangement of the TMJ is explained in detail in this presentation.
Cervical Hybrid Arthroplasty by Pablo Pazmino MDPablo Pazmino
This video explains Cervical Arthroplasty in combination with a fusion. When people have more than one cervical disc which has degenerated or which has sustained a traumatic rupture they may need a procedure to address both levels. These herniations may begin to affect the surrounding nerves and/or spinal cord. This video highlights the history, epidemiology, and treatment options both conservative and surgical. If you or someone you know needs to be seen in regards to Cervical Herniations/ Radiculopathy at multiple levels feel free to look us up online www.beverlyspine.com or call toll free 1-8SPINECAL-1
Supplemental corticosteroids for dental patients with adrenal insufficiencyR...DrKamini Dadsena
Primary Adrenal Insufficiency:
It is caused by a progressive destruction of the adrenal cortex, usually of an idiopathic nature (most commonly autoimmune), but also results from hemorrhage, sepsis, infectious diseases (such as tuberculosis, human immunodeficiency virus, cytomegalovirus and fungal infection), malignancy, adrenalectomy, amyloidosis or drugs.
Clinical assessment scoring system for tracheostomy (CASST) criterion: Objec...DrKamini Dadsena
Tracheotomy has been used for many centuries as a means to bypass upper airway obstruction.
Head and neck cancers are often associated with anatomic changes which can create a potentially difficult airway.
CARNOY’S SOLUTION AS A SURGICAL MEDICAMENT IN THETREATMENT OF KERATOCYSTIC O...DrKamini Dadsena
The term keratocyst was coined by Philipsen in 1956.
Unlike the other cystic lesion KOT, has got strong tendency for recurrence.
Treatment of these lesions remains controversial and has a number of dilemmas about the choice of treatment whether to use carnoys solution as an adjunct therapy after removal of the lesion.
Temporomandibular disorders (TMDs) are considered the major cause of orofacial pain. Internal derangement (ID) of the temporomandibular joint (TMJ), which is classified as disc displacement with or without reduction, is one of the disorders of the TMJ that is frequently seen.
Displacement of the articular disc can result in decreased joint space, joint noise (clicking, popping, or crepitation), arthritis, condylar resorption, inflammation, and compression of the bilaminar tissue, all of which can cause various degrees of pain and dysfunction.
Changing Guidelines of CPR & BLS For General Dental Practitioners & O...DrKamini Dadsena
The tolerance of the heart to anoxia is relatively high, but the central nervous system will show irreversible lesions if anoxia lasts for more than 3–4 min.
Though unusual, there are reports of deaths due to CPA in dental offices during dental treatment.
Cardiopulmonary resuscitation (CPR) is a vital skill which must be mastered by all health care professionals.
Therefore the thorough knowledge of CPR and Basic Life Support is of utmost importance to the dentist.
Neck Dissection: Nomenclature, Classification, and TechniqueDrKamini Dadsena
Removal of the at-risk lymphatic basins serves two important purposes.
First, it allows the removal and identification of occult metastasis in patients in whom cervical metastasis are a risk, - Elective neck dissection.
Secondly, it allows the removal of disease in patients in whom metastasis are highly suspected based on imaging, clinical examination or fine needle aspiration, - Therapeutic neck dissection.
Clinical use of botulinum toxins in oral and maxillofacial surgeryDrKamini Dadsena
Purified botulinum toxin (BTX) was the first bacterial toxin used as a medicine. Since its introduction into clinical use, over 30 years ago, it has become a versatile drug in various fields of medicine.
Its mechanism of inhibiting acetylcholine release at neuromuscular junctions following local injection is unique for the treatment of facial wrinkles.
Other dose-dependent anti-neuroinflammatory effects and vascular modulating properties have extended its spectrum of applications.
Cavernous sinus thrombosis represents a rare but devastating disease process that may be associated with significant long-term patient morbidity or mortality. The prompt recognition and management of this problem is critical.
In 1989, Shetty and Freymiller [7] reviewed indications for removal of teeth in the line of fracture. They recommended the following indications:
1. Significant periodontal disease with gross mobility and periapical pathology
2. Partially erupted third molars with pericoronitis or cystic areas
3. Teeth preventing the reduction of fractures
4. Teeth with fractured roots
5. Teeth with exposed root apices or teeth in which the entire root surface from the apex to the gingival margin is exposed
6. Excessive delay from the time of fracture to the time of definitive treatment
In addition to these indications, another indication that requires extraction of teeth in the line of fracture is an acute, recurring abscess at the site of the fracture despite antibiotic therapy(8)
Assessment of lingual nerve injury using different surgical variables for man...DrKamini Dadsena
Assessment of lingual nerve injury using different surgical variables for mandibular third molar surgery
The objective of this study was to investigate the incidence of sensory impairment of the lingual nerves following lower third molar surgery and to compare the outcome with various operative variables.
Factors that predicted lingual nerve injury were lingual flap retraction, tooth sectioning, and buccal guttering.
Instruments in major oral and maxillofacial surgeryDrKamini Dadsena
A surgical instrument is a specially designed tool or device for performing specific actions and carrying out desired effects during surgery or operations.
Fracture is a break in the structural continuity of bone, And starts immediately after the fracture occurs.
fracture results in a well-defined progression of tissue responses that are designed to remove tissue debris, to reestablish vascular supply and to produce a new skeletal matrix.
Traditional classification were given 100 years back when RTA , assaults, sports injuries, industrial accidents were minimal.
Over the past 100 years RTA (high speed & Low speed) assaults, sports injuries (high contact/ low contact), industrial accidents have increased.
Fracture patterns which are not matching the traditional injuries pattern.
Can speed up diagnosis and treatment planning
Cohorting / clubbing of complication to Specific Fractures.
It facilitate communication between peers and assist documentation and research.
It also have prognostic value for patients and assist Surgeons in planning their management.
It serves as a basis for treatment and for evaluation of the results.
Different fractures/ Areas of fracture has different treatment plan / approaches.
Undisplaced fracture : conservative/ surgical
Displaced Fractures: Surgical/ conservative with traction
Trauma is a global problem and continues to be a leading cause of disability and death.
Approximately 25% to 30% of deaths caused by trauma can be prevented when a systematic and organized approach is used.
The main goal of the initial assessment
Recognize the patient who does have life-threatening injuries
Establish treatment priorities, and
Manage them aggressively
A flap is a unit of tissue that is transferred from one site (donor site) to another (recipient site) while maintaining its own blood supply or from a anastomised vessel.
Flaps come in many different shapes and forms. They range from simple advancements of skin to composites of many different types of tissue
The International Association for the Study of Pain (IASP)1 defines trigeminal neuralgia (TN) as a sudden, usually unilateral, severe brief stabbing recurrent pain in one or more branches of the fifth cranial nerve
synonyms
Idiopathic trigeminal neuralgia / Tic Doulourex.
Trifacial Neuralgia.
Fothergell’s disease.
In 1677 John Locke, a American physician and philosopher, accurately identified the major clinical features of TN
In 1756 the French physician Nicolaus Andre coined the term “Tic douloureux” to the condition.
The English physician John Fothergill in 1773 published detailed description of TN, since then, it has been referred to as ‘Fothergill’s disease’.
Peripheral injections
Long acting LA
Alcohol
Glycerol
Peripheral neurectomy/ nerve avulsion
Cryotherapy
Gasserian ganglion procedures
Percutaneous stereotactic radiofrequency thermal lesioning of the trigeminal ganglion and/or root (rfl)
percutaneous glycerol gangliolysis of the trigeminal ganglion
percutaneous balloon microcompression of the trigeminal ganglion
Intracranial procedures
MVD
Partial sensory rhizotomy
Gamma knife radiation to the trigeminal root entry zone GKR
An oroantral communication is an unnatural perforation between oral cavity and maxillary sinus.
Oroantral fistula is an epithelized, pathological, communication between these two cavities. A fistulous tract present more than 14 days should be considered as chronic fistula.
The practice of surgery rests on certain fundamental principles which remain unchanged, though to apply them the surgeon may have to modify techniques to suit the anatomical field, the type of operation and the conditions obtaining at the time.
Obstructive sleep apnea (OSA) is a prevalent chronic disease characterized by pharyngeal collapse during sleep.
Sleep disorder that involves cessation or significant decrease in airflow through the upper airway in the presence of breathing effort.
Obstructive sleep apnea is the second most common sleep disorder, insomnia being the most common.
Associated with recurrent oxyhemoglobin desaturations and arousals from sleep
Apnea index- no. of apneas /hr of total sleep time.
AHI (APNEA-HYPOPNEA INDEX)- No of apneas and hypoapneas/hr of total sleep time.
RDI (Respiratory Disturbance Index) – no. of apneas, hypoapneas and respiratory effort related arousals(RERA)/hr of total sleep time.
Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
Dr. Vidisha Kumari, a leading epidemiologist in Bangalore, emphasizes the importance of getting vaccinated. "The flu vaccine is our best defense against the influenza virus. It not only protects individuals but also helps prevent the spread of the virus in our communities," he says.
This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
Residents are reminded that the flu vaccine is safe and effective. Common side effects are mild and may include soreness at the injection site, mild fever, or muscle aches. These side effects are generally short-lived and far less severe than the flu itself.
Healthcare providers are also stressing the importance of continuing COVID-19 precautions. Wearing masks, practicing good hand hygiene, and maintaining social distancing are still crucial, especially in crowded places.
Protect yourself and your loved ones by getting vaccinated. Together, we can help keep Bangalore healthy and safe this flu season. For more information on vaccination centers and schedules, residents can visit the Karnataka Health Department’s official website or follow their social media pages.
Stay informed, stay safe, and get your flu shot today!
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
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.
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
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
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
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
New Drug Discovery and Development .....NEHA GUPTA
The "New Drug Discovery and Development" process involves the identification, design, testing, and manufacturing of novel pharmaceutical compounds with the aim of introducing new and improved treatments for various medical conditions. This comprehensive endeavor encompasses various stages, including target identification, preclinical studies, clinical trials, regulatory approval, and post-market surveillance. It involves multidisciplinary collaboration among scientists, researchers, clinicians, regulatory experts, and pharmaceutical companies to bring innovative therapies to market and address unmet medical needs.
These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
New Directions in Targeted Therapeutic Approaches for Older Adults With Mantl...i3 Health
i3 Health is pleased to make the speaker slides from this activity available for use as a non-accredited self-study or teaching resource.
This slide deck presented by Dr. Kami Maddocks, Professor-Clinical in the Division of Hematology and
Associate Division Director for Ambulatory Operations
The Ohio State University Comprehensive Cancer Center, will provide insight into new directions in targeted therapeutic approaches for older adults with mantle cell lymphoma.
STATEMENT OF NEED
Mantle cell lymphoma (MCL) is a rare, aggressive B-cell non-Hodgkin lymphoma (NHL) accounting for 5% to 7% of all lymphomas. Its prognosis ranges from indolent disease that does not require treatment for years to very aggressive disease, which is associated with poor survival (Silkenstedt et al, 2021). Typically, MCL is diagnosed at advanced stage and in older patients who cannot tolerate intensive therapy (NCCN, 2022). Although recent advances have slightly increased remission rates, recurrence and relapse remain very common, leading to a median overall survival between 3 and 6 years (LLS, 2021). Though there are several effective options, progress is still needed towards establishing an accepted frontline approach for MCL (Castellino et al, 2022). Treatment selection and management of MCL are complicated by the heterogeneity of prognosis, advanced age and comorbidities of patients, and lack of an established standard approach for treatment, making it vital that clinicians be familiar with the latest research and advances in this area. In this activity chaired by Michael Wang, MD, Professor in the Department of Lymphoma & Myeloma at MD Anderson Cancer Center, expert faculty will discuss prognostic factors informing treatment, the promising results of recent trials in new therapeutic approaches, and the implications of treatment resistance in therapeutic selection for MCL.
Target Audience
Hematology/oncology fellows, attending faculty, and other health care professionals involved in the treatment of patients with mantle cell lymphoma (MCL).
Learning Objectives
1.) Identify clinical and biological prognostic factors that can guide treatment decision making for older adults with MCL
2.) Evaluate emerging data on targeted therapeutic approaches for treatment-naive and relapsed/refractory MCL and their applicability to older adults
3.) Assess mechanisms of resistance to targeted therapies for MCL and their implications for treatment selection
- 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
3. ID was first described by Hey and Davies“ in 1814 as
localized mechanical fault interfering with the smooth
action of a joint.
“A disturbance in the normal anatomic relationship
between the disc and condyle that interferes with
smooth movement of the joint and causes momentary
catching, clicking, popping Or locking.”
-Laskin DM Oral Maxillofacial Surg Clin N Am 1994
Internal derangement is defined as any interference with
smooth joint movement.
-Oral Maxillofacial Surg Clin N Am 20 (2008)
4. -Oral Maxillofacial Surg Clin N Am 20 (2008)
Disc derangement: A malpositioning of the
articular disc relative to the condyle and
eminence .
With reduction- The articular disc resumes its
normal position on top of the condyle on opening
Without reduction- The articular disc remains
malpositioned on opening attempts, resulting in
restricted mouth opening in acute cases
5. -Oral Maxillofacial Surg Clin N Am 20 (2008)
Disc adherence - A temporary
sticking of the disc either to the fossa
or to the condyle
Disc adhesion - A fibrotic connection
between the disc and the condyle or
the disc and the fossa
6. Subluxation (hypermobility)- An
overextension of the disc–condyle
complex on opening beyond the
eminence.
Joint dislocation- A dislocation of the
entire disc–condyle complex beyond the
eminence combined with the inability
to return passively into the fossa
-Oral Maxillofacial Surg Clin N Am 20 (2008)
7. Wilkes Classification
Stage I -Early reducing disk displacement
Stage II - Late reducing disk displacement
Stage III - Nonreducing disk displacement—
acute/subacute
Stage IV - Nonreducing disk displacement—chronic
Stage V- Nonreducing disk displacement—chronic with
osteoarthrosis
OMFS Fonseca volume- 4
8.
9.
10.
11.
12. Etiology/pathophysiology
• Trauma- most common
• Macrotrauma -
– hit or blow to the face,
– Oral intubation
– dental/surgical procedures difficult extractions,
– elongation of ligaments,
– creating internal joint laxity
-Oral Maxillofacial Surg Clin N Am 20 (2008)
13. Microtrauma
• Application of prolonged repetitive forces,
such as in clenching or grinding.
• When the force is within physiologic limits,
but is applied to articular cartilage that has a
reduced adaptive capability, or when the force
exceeds the adaptive capability of normal
cartilage, tissue degeneration may ensue .
-Oral Maxillofacial Surg Clin N Am 20 (2008)
14. formation of = neutralizing
free radicals mechanisms
Mechanical loading of the joint
local hypoxia
Reperfusion of hypoxic cells
an explosive increase in free radicals
LOCAL HYPOXIA REPERFUSION THEORY
15. degradation of hyaluronic acid
impair the lubrication of the TMJ
increase friction btw joint
components
adherences or an anchored disc
a disc derangement
free radicals may lead
crosslinking of fibrinogen and
fibronectin
-Oral Maxillofacial Surg Clin N Am 20 (2008)
16. • Indirect trauma
• acceleration-deceleration (whiplash) injuries
in the absence of a direct trauma to the face
• Degenerative joint disease
• Lateral pterygoid spasm
• Occlusal factors
-Oral Maxillofacial Surg Clin N Am 20 (2008)
17. Physical findings that may indicate ID are:
1. Opening and reciprocal clicking that do not occur at exactly the same
condylar position (stage I or II).
2. Joint tenderness to palpation, especially with function. V
3. Deviation to the affected side until choking occurs. If bilateral clicking is
present, deviation may occur to one side until it clicks, and then to the ‘
other side until it clicks.
4. Deviation of opening (in unilateral cases) with lack of significant
palpable translation (stages III—V). -
5. Pain in the affected joint While biting on a wooden tongue depressor.
6. Crepitus, which is often associated with chronic disk displacement,
perforation, and degenerative changes (stage V).
7- Elimination of pain following local anesthesia of the affected joint.OMFS Fonseca volume- 4
18. • The need for imaging confirmation of ID is
controversial.
• Panographic imaging is the standard for
screening of the jaws, including the general
morphology of the condyles.
• The disk-condyle relationship is often obvious
from the history and physical examination,
especially in stages I and II disease
19. • The absence of an imaging study may also
make it more difficult to identify the disk
position in the more chronic cases of stages IV
and V, primarily because the mandibular
opening is often nearly normal, with minimal
deviation or lack of lateral excursions.
• However, it is noted that magnetic resonance
imaging (MRI) and arthrography tend to
overdiagnose disk displacement.
• Therefore, the clinical diagnosis should be the
ultimate determining factor in the decision to
perform surgery.
20. Non surgical treatments
1. Soft diet
2. Application of heat, cold
3. Medications
4. Acupuncture
5. Electromyographic Biofeedback
6. Ultrasound therapy
7. TENS
8. LASER
9. Intraoral appliances
10.Occlusal therapy
11.Patient education
12.Diagnostic blocks
Management of Temporomandibular Disorders and Occlusion Sixth Edition
Jeffrey P. Okeson, DMD
Oral Maxillofacial Surg Clin N Am 18 (2006) 305–310
21. Application of heat and cold
1-Thermotherapy:
It is the application of hot fomentation on the symptomatic
area for 10 to 15 minutes, not exceeding 30 minutes.
The primary goal, is to increase blood supply through
vasodilatation, leading to decrease pain and joint
stiffness.
22. 2-Coolant therapy:
-It is the application of cold fomentation such as ethyl
chloride and fluoromethane sprays.
-This intend to decrease pain by numbing the symptomatic
area.
-Combination of hot and cold fomentation is helpful.
23. 2. Pharmacologic therapy used to treat
symptoms of TMD can be classified into five
types:
1) analgesics
2) Corticosteroids
3) muscle relaxants
4) anti-depressants
5) local anesthetics.
24. 3-Acupuncture:
It is one of the alternative Medicine techniques.
Its action is still unclear, but was successfully used in
treating TMD symptoms.
25. 4-Electromyographic Biofeedback:
some emotional states may be associated to muscle
hyperactivity, relaxation training assisted by the
use of EMG biofeedback, can reduce diurnal
muscle activity; thus reducing pain.
26. 5-Ultrasound therapy:
It has the same concept of thermotherapy, but more effective;
because it acts on deeper tissues, not just the surface.
Ultrasound not only increases the blood flow in deep tissues
but also seems to separate collagen fibers, which improves
the flexibility and extensibility of connective tissues,
decrease joint stiffness, provide pain relief, improve
mobility, and reduce muscle spasm.
27. 6-Transcutaneous Electrical Nerve
Stimulation “TENS”:
Electric stimulation devices for treatment of
TMD are claimed to have two main
purposes; relief of pain and relief of muscle
hyperactivity or spasm.
28. 7-LASER “Light Amplification by Stimulated
Emission of Radiation”:
It has wide application in dentistry.
The only physical risk is eye damage; special eye goggles
should be worn for protection.
29. Manual techniques "Hands on therapy":
These include treatment procedures intended to
promote motion and relieve pain in musculoskeletal
structures. As
1-Soft tissue mobilization.
2-Joint mobilization.
3-Muscle conditioning.
30. b) Assisted muscle stretching:
Stretching, to regain muscle length, should be performed with
gentle intermittent force that is gradually increased, where
pain should not be elicited in this exercise.
Important in management of myofacial pain.
31. c) Resistance exercises:
Resistance exercises use the concept of reflex relaxation or
reciprocal inhibition.
These exercises are useful if the restricted opening is secondary
to muscle condition.
They should not be used for painful intracapsular restrictions; it
also should not produce pain which could leads to cyclic
muscle pain.
32. Splint therapy in intracapsular TMD
• Theory: mechanically altering the position of
the mandible can have two results:
1. The condylar head being held in a more inferior,
anterior position will mechanically persuade the
disk to establish itself atop the condylar head in
a more favorable position.
2. The second is that in wearing certain types of
splints (i.e., pivotal splint, mandibular anterior
repositioning appliance [ARA]) the condyle disk
glenoid fossa relationship is “unloaded
34. 1- Occlusal Therapy
Types of occlusal splints:
• Although there are many types of appliances,
two major types of appliances are commonly
used for TMD. Stabilization splints and
anterior repositioning splints.
35. a- Stabilization Splint:
• It is a hard acrylic resin, flat plane splint that provides a
temporary and removable ideal occlusion.
• Can be made to cover the maxillary or mandibular dental
arches; although the former provides more retention&
stability.
• patient.
36. a- Stabilization Splint:
• Stabilization splints are designed to
- provide stabilization of the joint
- redistribution of the occlusal forces at the tooth
and/or joint level
- relaxation of the elevator muscles
- protection of the teeth from the effects of bruxism.
37. a- Stabilization Splint:
• Myogenous pain disorders respond better to part-
time use, so in bruxism it is suggested that patients
wear the splint only at night.
• Intracapsular disorders are better managed with
continuous use.
• Successful splint therapy needs about two to three
months.
38. b- Anterior repositioning Splint:
It is a full arch hard acrylic interocclusal
device that can be used in either arch
to encourage the mandible to assume a
position more anterior than intercuspal
position.
However the maxillary arch is preferred
because a guiding ramp can be more
easily fabricated to direct the mandible
anteriorly.
39. Soft or Resilient Splints:
also known as mouthguard or nightguard.
It is not as effective in reducing myofacial pain
symptoms as is a hard acrylic appliance.
40. A pivotal type of appliance
• Used to “unload” the temporomandibular
joint components and mildly stretch the joint.
• These can be maxillary or mandibular
appliances with occlusal contact only in the
most posterior tooth.
• They can be designed to be either unilateral or
bilateral, depending on the joint or joints
involved in the disorder.
41. Surgical procedure:
1. Arthrocentesis and lavage
2. Arthroscopy
3. Arthrotomy with disk repair
1. a. Plication
2. b. Bilaminar flap repair
4. Arthrotomy with diskectomy
5. Arthrotomy with diskectomy and autologous graft disk
replacement
1. a. Dermis
2. b. Auricular cartilage
6. Arthrotomy with diskectomy and autologous flap
reconstructions
7. Arthrotomy with diskectomy and alloplastic disk
replacement
8. Condylotomy
OMFS Fonseca volume- 4
42. Temporomandibular joint arthrocentesis
• Arthrocentesis consists of TMJ lavage,
placement of medications into the joint, and
examination under anesthesia.
• It usually is performed as an office-based
procedure under local anesthesia assisted
with conscious intravenous sedation, although
it can be performed with local anesthesia
alone
Dent Clin N Am 51 (2007) 195–208
45. The advantages of arthrocentesis
• it is a simple, cost-effective, minimally invasive
procedure with little morbidity that can be
performed in the office.
No significant complications
• Patients may experience temporary swelling
and soreness over the joint area and a slight
posterior open bite malocclusion for 12 to 24
hours after the procedure.
46. Indications for temporomandibular joint surgery
• TMJ surgery is indicated if
– (1) pain or dysfunction make the condition
intolerable,
– (2) none of the reasonable nonsurgical modalities
offers adequate levels of relief, and
– (3) the intracapsular condition is a major cause of
the condition.
• Patient selection seems to be the best
determinant of surgical success.
Oral Maxillofacial Surg Clin N Am 18 (2006)
305–310
47. • The first criterion, significant TMJ pain and
dysfunction, may be the most important.
• The more localized the pain and dysfunction
to the TMJ, the better is the prognosis for a
successful surgical outcome
• The more diffuse the pain and dysfunction,
the less likely it is that surgical intervention
will be successful.
48. • The second criterion, refractory to nonsurgical
treatment.
• Nonsurgical therapy should include some combination of
patient education, medications, physical therapy, an
occlusal appliance, and possibly, counseling. Most
patients respond successfully to this treatment;
therefore, surgical consideration is reserved only
forpatients who fail to respond successfully.
• Surgical treatment is limited to those who have pain and
dysfunction that arises from within the TMJ.
• Patients who have pain and dysfunction that arise from
the masticatory muscles or other non-TMJ sources are
49. • The third criterion, imaging evidence of disease,
seems to be the most objective; however,
imaging findings should not be interpreted in
isolation.
• The correlation of imaging findings of disk
derangement and osteoarthrosis with pain are
poor.
• Therefore, imaging evidence should be used to
confirm and support the clinical findings. The
decision for surgical intervention
50. • The procedure that has the highest potential
for success with the lowest risks and most cost
effectiveness should be chosen for the
patient’s specific problem.
51. • Arthroscopy simply means ‘‘looking into a joint’’
• Derived from arthros, which means ‘‘joint’’ and scopien,
which means ‘‘to view.’’
• HISTORY :
• Founder - Dr. Kenji Takagi - 1918, University of Tokyo, first
performed in the knee of a cadaver.
• 1937 - presented - poorly accepted.
• 1957 - Dr. Maski Watanabe - atlas of arthroscopy.
• 1970 - Introduction fo fiberoptic light.
• 1971 - Dr. Richard ‘O’ connor - father of modern
arthroscopy. - first used as a therapeutic tool - operative
arthroscope.
R. Dean White, DDS, MS Atlas Oral Maxillofacial Surg Clin N Am
11 (2003) 129–144
52. • The first published report of temporomandibular joint arthroscopy was by
Professor M. Ohnishi in 1975
• But TMJ arthroscopy did not become popular until reports were published by
Dr. Ken Ichiro Murakami in 1981, 1982, and 1985.
• The first published report in the American literature was by Drs. Nuelle,
Alpern, and Ufema in an orthodontic journal in 1986
• and the first comprehensive study with results was published by Dr. Bruce
Sanders in 1986.
• Arthroscopy is the visualization of a potentially expandable, well confined
joint.
• - Diagnostic
• - Operative
53. Instrumentation
Cannulas with blunt and sharp trocars. 2.3-mm 0 and 30 Stryker arthroscopes.
Hand instruments: probes, serrated knife, retrograde knife.
59. • Wilkes classification
• Flaws:
• J Boundaries between different stages are not
lucid J Is it a progressive disorder? J The
criteria used in diagnosis are not provided in
measurable forms Li It fails to high lighten the
role of psychosocial disorders
60. • RDC/TMDs
• ■ RDC/TMD is a dual axis diagnostic system
for TMDs.
• - It ensures reliable, reproducible and valid
criteria with high sensitivity and specificity to
define the most common types of TMDs
• RDC/TMDs
• Axis // : psychological status
• ■ Pain intensity • Pain related disability ■
Depression ■ Non specific physical symptoms
61. A, Mandibular stabilization appliance. B, Occlusal view of a mandibular stabilization
appliance with contacts and eccentric guidance marked with articulating paper. Right
(C)
and left (D) lateral view in the musculoskeletally stable position. Right (E) and left (F)
lateral view during eccentric movement of the mandible. The presence of canine
62. A, The anterior positioning appliance causes
the mandible to assume a forward position,
creating a more favorable condyle-disc
relationship. B, During normal closure the
mandibular anterior teeth contact in the
63. The patient bites into the setting acrylic at the
desired anterior position as determined by
the groove.
64. Many clinicians believe that this device will
cause condylar distraction; however, this
has not been documented. B, Because the
pivot is anterior to the force of the elevator
muscles (masseter and temporalis), the joint is
seated to the musculoskeletally stable
position while force is applied to the posterior
tooth contacting the pivot. Studies suggest
that such an appliance loads the joints; it does
not distract the joints. Distraction occurs
only if extraoral force is applied upward on the
chin
65. A, Clinical photo of a mandibular pivoting
appliance. Only the maxillary first molar
contacts the appliance. B, The patient wore
this appliance continuously for only 2 weeks.
When it was removed, the occlusion changed.
The maxillary first molar was intruded out
of occlusal contact.
66. • ID was first described by Hey and Davies“ in 1814 as
localized mechanical fault interfering with the smooth
action of a joint.
• “a disturbance in the normal anatomic relationship
between the disc and condyle that interferes with
smooth movement of the joint and causes momentary
catching, clicking, popping Or locking.”
-Laskin DM Oral Maxillofacial Surg Clin N Am 1994
• Internal derangement is defined as any interference
with smooth joint movement.
-Oral Maxillofacial Surg Clin N Am 20 (2008)
67. • Disc derangement: A malpositioning of the
articular disc relative to the condyle and
eminence
– With reduction- The articular disc resumes its
normal position on top of the condyle on opening
– Without reduction- The articular disc remains
malpositioned on opening attempts, resulting in
restricted mouth opening in acute cases
-Oral Maxillofacial Surg Clin N Am 20 (2008)
68. • Disc adherence - A temporary sticking of the
disc either to the fossa or to the condyle
• Disc adhesion - A fibrotic connection between
the disc and the condyle or the disc and the
fossa
-Oral Maxillofacial Surg Clin N Am 20 (2008)
69. • Subluxation (hypermobility)- An overextension
of the disc–condyle complex on opening beyond
the eminence.
• Joint dislocation- A dislocation of the entire disc–
condyle complex beyond the eminence combined
with the inability to return passively into the
fossa
-Oral Maxillofacial Surg Clin N Am 20 (2008)
70. Internal Derangement of TMJ
part-2
Presented by:
Dr. Kamini Dadsena
Post Graduate in OMFS
NHDCRI,Sakri, Bilaspur (C.G.)
71. Outline
• Indication & criteria of surgery
• Arthrocentesis & lavage
• Arthroscopic treatment
• Disk Repositioning
• Disk repair
• Diskectomy
• Diskectomy and autologous graft disk replacement
– Temporalis myofacial flap
– Dermis
– Auricular cartilage
• Condylotomy
72. Indications for TMJ surgery
1. Pain or dysfunction make the condition intolerable,
2. None of the reasonable nonsurgical modalities offers
adequate levels of relief, and
3. The intracapsular condition is a major cause of the condition.
• Surgical treatment is limited to those who have pain and
dysfunction that arises from within the TMJ.
• Patients who have pain and dysfunction that arise from the
masticatory muscles or other non-TMJ sources are not
surgical candidates and they will be made worse by surgical
intervention.
Oral Maxillofacial Surg Clin N Am 18 (2006) 305–310
73. CRITERIA
Significant TMJ pain
and dysfunction
• The more localized
the pain and
dysfunction to the
TMJ the better is
the prognosis
• The more diffuse
the pain and
dysfunction, the
less likely it is that
surgical
intervention will be
successful.
Refractory to
nonsurgical
treatment
• Most patients
respond
successfully to this
treatment;
• therefore, surgical
consideration is
reserved only for
patients who fail to
respond
successfully.
Imaging evidence of
disease
• Imaging findings
should not be
interpreted in
isolation
• Imaging evidence
should be used to
confirm and
support the clinical
findings.
Oral Maxillofacial Surg Clin N Am 18 (2006) 305–310
74. Surgical procedure:
1. Arthrocentesis and lavage
2. Arthroscopic management
3. Disk Repositioning
4. Disk repair
5. Diskectomy
6. Diskectomy and autologous graft disk replacement
1. Temporalis myofacial flap
2. a. Dermis
3. b. Auricular cartilage
7. Condylotomy
OMFS Fonseca volume- 2
75. Temporomandibular joint
arthrocentesis
• Arthrocentesis consists of TMJ lavage,
placement of medications into the joint, and
examination under anesthesia.
• It usually is performed as an office-based
procedure under local anesthesia assisted
with conscious intravenous sedation, although
it can be performed with local anesthesia
alone
Dent Clin N Am 51 (2007) 195–208
77. Arthrocentesis: placement of medication into
upper TM joint space after lavage.
Dent Clin N Am 51 (2007) 195–208
78. • success rates - 70% to 90%
– Dimitroulis- Br J Oral Maxillofac Surg 1995;33:23–6.
– Hosaka H- Oral Surg Oral Med Oral Pathol Oral RadiolEndod 1996;82:501–4.
– Nitzan DW- J Oral Maxillofac Surg 1997;55:151–7.
• primary indication
1. painful limited mouth opening
2. Inflammation in the joint
Dent Clin N Am 51 (2007) 195–208
79. Study done by Dorrit W. Nitzan
year Sample
size
Study Follow-up Conclusion
JOMS
49.1163-
1167, 1991
17 joints
in 17
patients
Temporomandibular Joint
Arthrocentesis: A Simplified
Treatment for Severe, Limited
Mouth Opening
4 to
14 months.
highly effective in
reestablishing
normal opening and
relieving pain
JOMS
55:151-
157, 1997
Thirty-
nine
patients
(40
joints)
Long-Term Outcome of
Arthrocentesis for Sudden-
Onset, Persistent, Severe Closed
Lock of the Temporomandibular
Joint
6 to 37
months
Arthrocentesis for
sudden-onset closed
lock provided
sustained normal joint
function and marked
pain relief.
J Oral
Maxillofac
Surg
59:1154-
1159, 2001
36
patients
38 joints
The Use of Arthrocentesis for
the Treatment of Osteoarthritic
Temporomandibular Joints
6 to 62
months
Arthrocentesis is a
safe and rapid
procedure that in
many instances results
in the osteoarthritic
TMJs returning to a
healthy functional
state.
80. Advantages of arthrocentesis
• it is a simple, cost-effective, minimally invasive
procedure with little morbidity that can be performed in
the office.
Dent Clin N Am 51 (2007) 195–208
Complication
•Not significant
•Patients may experience temporary swelling and
soreness over the joint area and a slight posterior open
bite malocclusion for 12 to 24 hours after the procedure.
Disadvantages
Arthrocentesis is clearly inefficient in disorders caused by
factors that cannot be eliminated by lavage, such as disc
displacement with reduction, disc displacement without
reduction, and fibrous adhesions.
81. ARTHROSCOPIC MANAGEMENT
Derived from two greek words arthros, which means ‘‘joint’’ & scopien, which
means ‘‘to view.’’
Arthroscopy simply means ‘‘looking into a joint’’
82. HISTORY
• The first published report of temporomandibular joint arthroscopy was
by Professor M. Ohnishi in 1975
• But TMJ arthroscopy did not become popular until reports were
published by Dr. Ken Ichiro Murakami in 1981, 1982, and 1985.
• The first published report in the American literature was by
Drs. Nuelle, Alpern, and Ufema in an orthodontic journal in 1986
• The first comprehensive study with results was published by
Dr. Bruce Sanders in 1986.
• TMJ arthroscopy is now an important aid in the diagnosis and
treatment of temporomandibular disorders(TMD).
1. R. Dean White, DDS, MS Atlas Oral Maxillofacial Surg Clin N Am 11 (2003)
2. OMFS Fonseca volume- 4
86. Instrumentation
Cannulas with blunt and sharp trocars. 2.3-mm 0 and 30 Stryker arthroscopes.
Hand instruments: probes, serrated knife, retrograde knife.
R. Dean White, DDS, MSAtlas Oral Maxillofacial Surg Clin N Am 11 (2003) 129–144
87. Biopsy forceps, alligator forceps.
Arthrotome mechanical shaver blade, electrocautery tips
with insulation.
R. Dean White, DDS, MSAtlas Oral Maxillofacial Surg Clin N Am 11 (2003) 129–144
88. Preoperative Care
• physical condition of the patient should be reevaluated
• prophylactic treatment implemented.
• Diagnostic TMJ arthroscopy can be performed under
– local anesthesia
– intravenous sedation with Midazolam
• Patients should be asked to remove earrings and contact
lenses before arthroscopy.
• Preoperative radiographic examination may consist of one or
more of the following
– Axial or frontal projection
– TMJ orthopantograph
– Sagittal tomogram (or equivalent)
OMFS Fonseca volume- 4
89. Puncture directions for the TMJ. (1) Inferolateral.
(2) Endaural. (3) Anterolateral.
Oral and Maxillofacial Surgery Edited by Lars Andersson
90. normal posterior recess
and posterior ligament.
normal intermediate zone.
normal anterior recess.
Normal arthroscopic
anatomy
R. Dean White, DDS, MSAtlas Oral Maxillofacial Surg Clin N Am 11 (2003) 129–144
91. Single fibrous adhesions from midportion of disc
to posterior aspect of fossa
Postop view of adhesions
after lysis in the same left joint.
Posterior ligament synovitis of right joint.
Postoperative view of posterior ligament after
cauterization of same right joint
R. Dean White, DDS, MSAtlas Oral Maxillofacial Surg Clin N Am 11 (2003) 129–144
92. Synovial hyperplasia of left joint. Disc perforation of right joint. Note smooth
surface of condyle anteriorly.
Moderate synovitis of posterior ligament and
posterior band of disc of left joint.
Severe synovitis of posterior ligament and
posterior band of disc of left joint.
R. Dean White, DDS, MSAtlas Oral Maxillofacial Surg Clin N Am 11 (2003) 129–144
95. Vascular injury
• In about 80%, the temporal vessels were involved.
• The bleeding is usually venous in origin and easily
controlled using a tamponade.
• In persistent cases, the cutaneous incision can be extended
slightly and the source of bleeding ligated or controlled
with cautery.
McCain protocol
• All instruments are removed, and the condyle is moved to
the compartment where bleeding has occurred and kept
there for about 5 minutes.
• The instruments are then reinserted to irrigate and debride
clots that may have formed. If this procedure does not
work, the joint must be opened and the bleeding
controlled.
OMFS Fonseca volume- 4
96. Extravasation of irrigation fluid
• In prolonged arthroscopic surgery the risk is
greater, and cases of extensive edema in the
upper airway with subsequent postobstructive
pulmonary edema have been reported.
• If the surgeon continually checks the outflow,
this is unlikely.
OMFS Fonseca volume- 4
97. Scuffing
• The cartilage may be scuffed by the trocar
during puncture.
• This lesion can be avoided if the trocar is
directed toward the crest of the glenoid fossa
until it touches the bone.
• The sharp trocar is then exchanged for a blunt
one, which is directed slightly inferiorly to slip
into the upper compartment.
OMFS Fonseca volume- 4
98. Broken instruments
A protocol for arthroscopic retrieval of broken instruments has been
recommended by McCain and de la Rua
– 1. Stop the procedure and maintain the position of the
arthroscope and working cannulas.
– 2. Keep the broken object in view.
– 3. Check the inflow bags to maintain sufficient irrigation and to
prevent collapse of the joint from lack of fluid.
– 4. Record and measure the depth of the instrument with a scored
cannula.
– 5. Have adequate instruments available for removal.
– 6. Adjust inflow to ensure optimal visibility.
– 7. Radiograph the joint if the object cannot be located.
– 8. Consider fluoroscopic assistance to localize the object if it
cannot be found arthroscopically.
– 9. Remove the object.
OMFS Fonseca volume- 4
99. Otologic complications
• Van Sickels and colleagues reported a case of
perforation of the tympanic membrane and
partial dislocation of the malleus.
• Applebaum and coworkers described three
patients who largely lost their hearing.
• Such serious complications can be avoided only
by proper training in TMJ anatomy and practice
on cadavers before the clinical use of TMJ
arthroscopy.
• studies indicate that the risk of adverse effects on
hearing is extremely low.
OMFS Fonseca volume- 4
100. Intracranial damage
• Damage to intracranial structures during TMJ
arthroscopy has been reported.
• In patients whose cartilage and bone show
marked destruction (e.g., advanced
rheumatoid arthritis), great caution must be
exercised, and routine radiographic
examination should be supplemented with CT.
OMFS Fonseca volume- 4
101. Infection
• the frequency of infection was low (15 cases;
0.3%). (In an extensive review of 3146 patients (4831 joints) by McCain and
colleagues in 1992,:12 )
• Considering recent reports on the increase in
bacterial resistance to antibiotics, routine use of
antibiotic prophylaxis is not advisable.
• Arthroscopy is not indicated if an infection exists
in the area of intended puncture.
• However, in suppurative arthritis, arthroscopic
drainage and lavage can be helpful, and
specimens can be taken for culture.
OMFS Fonseca volume- 4
102. Nerve injury
• A/C McCain and colleagues – 3/4800 (0.06%)
with permanent nerve damage.“
• The auriculotemporal and facial nerves are
most often involved.
• Excessive extravasation of irrigation fluid may
rarely have a transient effect on the
infraorbital, inferior alveolar, and lingual
nerves.
OMFS Fonseca volume- 4
103. Disk Repositioning
• In 1979 McCarthy & Farrar 1st reported surgery to
reposition the disk into its normal anatomic
relationship relative to condyle and fossa.
• The chance of successful repositioning increase if the
disk has maintained its normal appearance (white,
shiny, firm) and length, and is minimally displaced.
• The posterior aspect: of the disk is positioned over the
superior portion of the condyle in a normal, healthy
joint.
• If the disk is severely displaced and does not reduce,
loading by the condyle increases on the retrodiskal
tissues, making them hypovascular.
OMFS Fonseca volume- 2
104. • Both the condyle and the articular eminence can undergo
remodeling, and a “pseudodisc” may eventually form.
• The disk should not be distorted or placed under tension
during posterior repositioning.
• Dense adhesions that result from longstanding disk
displacement often require releasing incisions in the anterior
and/or medial regions of the disc.
• Disc is plicated posteriorly and posterolaterally to return the
anteromedially displaced disc to its more normal anatomic
location.
• Hall describe a partial thickness plication of the disk
• Dolwick and sanders describe full thickness plication, if, the
disc can be repositioned without entering the lower
joint space. inferior joint space must be entered like osseous
contouring of condyle.
• A/C to Weinberg Emenectomy and condylotomy may also
facilitate improved disk repositioning.
• Success rate- 80% or more
(McCarty W, Farrar W: Surgery for internal derangements of the
temporomandibular joint. J Prosthet Dent 1979;42:191.)
OMFS Fonseca volume- 2
105. Arthrotomy with disk repair
• When indicated, perforations of the disk can be managed by reparative
technique
• For smaller perforations, the disk can be undermined from the
surrounding soft tissue for a tension free primary closure with a
nonresorbable suture.
• Osreophytes and bony overgrowths are commonly found under disk
perforations. Any necessary arthroplasty of the condyle can be
conveniently performed during disk repair procedures through the
perforation.
• Larger perforations of a dislocated disk require a more extensive repair
because the disk will unlikely reduce after the margins of the perforation
are excised because of the more dense adhesion formation and scarring.
• If the disk cannot be adequately repaired, then the surgeon must make
the decision to replace the disk with either an autologous or a
homologous graft, or perform a diskectomy.
OMFS Fonseca volume- 2
106. DISKECTOMY
• If a deformed disk is determined to be
unsalvageable, a diskectomy is considered.
• Diskectomy-
• First described by Lanz in 1909 diskectomy is
indicated in several instances:
1. irreparable disk perforation;
2. Complete loss of elasticity of the disk;
3. persistent pain and dysfunction even after disk
repositioning
OMFS Fonseca volume- 2
Partial
Total
107. • Recently Kondoh described a procedure referred to as disk
reshaping, which is a modification of a partial diskectomy.
• Only that portion of the disk and posterior attachment deemed
unsalvageable is excised to eliminate diseased tissue and remove
any obstacle for smooth condylar movement.
• After the disk and posterior attachment are excised and a smooth
motion of the condyle can be consistently repeated
intraoperatively, the condyle can be conservatively recontoured to
remove any irregularities or osteophytes.
• Intact articular cartilage should not be removed from either the
condylar head or the fossa. Excessive removal of articular cartilage
may predispose the joint to heterotopic bone forme tion and
subsequent ankylosis.
• Takaku and Toyoda followed 39 diskectomy patients over an
average of 20 years after surgery. All but two of their patients had
no pain and none experienced masticatory disorders. A mouth
opening of 35 mm was attained by 38 of the patients.
OMFS Fonseca volume- 2
108. Diskectomy with Replacement
• Rationale-
1. Protect the articular surface from further degenerative changes
2. Prevent joint adhesion
• The graft material was to create scafffold for synovial tissue ingrowth.
• Autologous materials-
1. Temporalis myofacial flaps
2. Auricular cartilage
3. Dermal grafts
OMFS Fonseca volume- 2
109. Temporalis myofacial flaps
• Advantage
1. Avoid a separate, remote donor site morbidity
2. Vascular flap
3. Its ability to be harvested in variable thickness to allow for
reconstruction of defects of variable size.
• Disadvantages
1. Possible flap necrosis
2. Adhesion formation within joint space
• A flap of 3-4 cm is sufficient.
• Zygomatic arch can be preplated before it osteotomized if the
surgeon desires to place the myofascial flap under the arch
over the eminence.
OMFS Fonseca volume- 2
110. Auricular cartilage graft
• Advantages
1. Auricular cartilage donot induce foreign body
reaction.
2. Resist most occlusal loading forces.
• Disadvantages
1. Require second donor site
• Complications
1. Prematurely displaced
2. Infection of graft
OMFS Fonseca volume- 2
112. Dermal graft
• Use
1. Disk replacement
2. More commonly disk repair of disc perforation
3. Interpositional material for TMJ Ankylosis
• Donor site:
1. Upper lateral thigh
2. Buttock
3. Groin
• Dermal graft-
1. full thickness
2. partial thickness
• Complete removal of epidermis from graft should be preferable to
avoid leaving epithelial remnant on graft, which may lead to
epithelial cyst formation on condyle from undersurface of graft.
• Disadvantage-
1. remote donor site,
2. fibrous tissue formation
OMFS Fonseca volume- 2
114. Modified Condylotomy
Campbell probably conceived the idea of condylotomy in
1949
Rhyba performed the first condylotomy in Great Britain.
Ward and colleagues suggested the term condylotomy and
were the first to publish on the procedure.
The concept of condylotomy for managing TMJ disease
originated from the early observation that patients who had
fracture dislocations of the mandibular condyle rarely
experienced joint clicking and dysfunction.
Therefore condylotomy was described as a subcondylar
osteotomy mimicking a displaced subcondylar fracture.
The procedure was performed in a closed manner using a
Gigli saw.
1983 - converted closed into open procedure.
Modified the relatively new IVRO – named
“modified condylotomy”.
Samuel J. McKenna, DDS, MD Oral Maxillofacial Surg Clin N Am 18 (2006) 369–381
115. • In 1961 Ward reported on
• In 1965, Campbell reviewed 80 of Ward’s patients who underwent
condylotomy between 1954 and 1964
• Campbell observed that increased joint space on postcondylotomy
tomograms correlated with improved symptoms. Campbell believed that
forward positioning of the condyle could establish a normal disc–condyle
relationship after condylotomy.
• In 1975, Banks and MacKenzie reported that 92% of 141 patients (172
condylotomy procedures) were either cured or improved after
condylotomy. They also noted that increased joint space on
postcondylotomy imaging correlated with improved symptoms
31% - cured,
55% -improved,
27% - unchanged,
9% - worse.
77 patients
responding
to a survey,
6 patients experienced
complete relief
8 patients continued to
improve
14 patients after
condylotomy for TMJ
clicking, locking, and pain.
3 months to 3 years
Samuel J. McKenna, DDS, MD Oral Maxillofacial Surg Clin N Am 18 (2006) 369–381
116.
117. Goals :
– Eliminate pain and dysfunction.
– Reverse the disease process.
– Prevent progression by reestablishing normal disc/condyle
relationship.
Indications :
– Painful TMJ with a reducing displacement of the disc.
– Relent progression to a nonreducing disc.
Contraindications :
– Edentulous patients
– patients with poor intercuspation, flat teeth.
Complications
– Wound infection.
– The condyle may displace in some cases and create an open bite on
the operated side
– Nerve damage
Disadvantages :
– Period of IMF.
– centric relation - centric occlusion discrepancy.
118. References:
1. Samuel J. McKenna, DDS, MD Oral Maxillofacial Surg Clin N Am 18
(2006) 369–381
2. OMFS Fonseca volume- 4
3. R. Dean White, DDS, MSAtlas Oral Maxillofacial Surg Clin N Am 11
(2003) 129–144
4. Oral and Maxillofacial Surgery Edited by Lars Andersson
5. Edward ellis 3rd ed
6. Grays anatomy
7. Dorrit W. Nitzan, DMD Oral Maxillofacial Surg Clin N Am 18 (2006) 311–
328
8. Dent Clin N Am 51 (2007) 195–208
9. J Oral Maxillofac Surg 49.1163-1167, 1991
10. J Oral Maxillofac Surg 55:151-157, 1997
11. J Oral Maxillofac Surg 59:1154-1159, 2001
12. Oral Maxillofacial Surg Clin N Am 18 (2006) 305–310
120. • Mechanism of Action 1. Reduction in pain level: Arthrocentesis reduces
pain by removing inflammatory mediators from the joint. The combined
treatment of arthrocentesis and Sodium Hyaluronate injection may
improve the results due to the long-term lubricating effect of Sodium
Hyaluronate, which prevents the onset of inflammatory mediators that are
responsible for pain.
• 39. 2. Maximal Mouth Opening: Arthrocentesis under high pressure is an
effective method to regain normal mouth opening in closed lock cases.
This effect is usually due to elimination of the adhesions around the disc.
Also the lubricating effect of Sodium Hyaluronate which either maintains
lubrication and minimizes wear and tear mechanically, or plays a role in
nutrition of the avascular parts of the disc and condylar cartilage.
• 40. 3. Clicking : Usually disappears due to decreased friction and
lubricating effect.
• 41. Technique