Term
| TMJ more common in men or women |
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Definition
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Term
systemic diseases of muscles such as polymyositis, dermatomyositis, hereditary myopathies
arthritis, ankylosis, growth disorders, recurrent dislocation, neoplasia, condyle fracture, sytsemic illness
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Definition
| can affect the function of the muscles of mastication |
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Term
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Definition
| radiography of joint after injection of opaque contrast material. |
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Term
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Definition
| a method of evaluating a joint involving the insertion of small cannulas along with a camera and instruments into a Y joint. |
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Term
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Definition
| pad of fibro cartilage or dense fibrous tissue present in some synovial joints |
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Term
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Definition
| dry cracking sound of TMJ articulation between condyle of mandible and glenoid fossa of temporal bone. |
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Term
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Definition
| clicks, pops, crepitus heard by ausculation or doppler ultrasound |
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Term
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Definition
| articulates on medial pole during rotation on lateral pole during translation |
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Term
| collateral (discal) ligaments |
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Definition
| attaches posterior band of disc to the lateral and medial poles of the condyle. A true ligament (collegenous connective tissue) that cannot stretch without deformation. contains nerve and blood vessels |
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Term
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Definition
| position of mandible when teeth are at maximum intercuspation |
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Term
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Definition
| postition of mandible when condyle is uppermost position in glenoid fossa. a reproducible and verifyable position. muscle of mastication are at rest here. |
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Term
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Definition
a disorder where the articulation is between the condyle of the mandible and glenoid fossa
a hinge joint with moveable socket.
gliding/translation and rotation movement |
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Term
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Definition
| fibrous connective tissue protects |
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Term
| what is the primary innervation of TMJ |
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Definition
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Term
| secondary innervation of tmj |
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Definition
| deep temporal nerve and masseteric nerve |
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Term
| ginglymoarthrodial movement |
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Definition
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Term
| articular disc/ meniscus what space does disk divide> |
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Definition
upper superior joint and lower inferior joint space
compartments are filled with synovial fluid produced by synovial membrane which lines joint.
synovial fluid provides nourishment and lubrication of avascular structures. (disc and bone are avascular, no nerve fibers) |
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Term
| what is the articular disc attached to> |
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Definition
lateral and medial aspects of the condyl
superior belly of lateral pterygoid muscle
joint capsule |
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Term
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Definition
separate the forces resulting from rotation and translation
absorb shock
improve fit between bony surfaces
protect edges of articulating surfaces
distribute weigh over large area
spread synovial fluid |
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Term
| hinge/rotating movement occurs where |
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Definition
| hinge, rotation in lower compartment |
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Term
| gliding/ translational movement occurs where |
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Definition
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Term
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Definition
masseter
temporalis
medial pterygoid
lateral pyerygoid
anterior digastric and myohyloids |
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Term
| muscles used for closing or elevation |
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Definition
| masseter, medial pterygoid and temporalis for closing/elevating movement. |
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Term
| muscles used for opening or depressor movement |
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Definition
lateral pterygoid and anterior digastric
lateral active at different times
superior-seats articular disc on eminence
inferior-attached mandibular condyle and functions during opening (protrudes mandible) |
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Term
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Definition
| clinical evaluation used to determing if muscle spasms or muscle disfunction is occuring |
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Term
| masseter is involved in elevation and closing, what is the origin and point of insertion |
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Definition
origin is zygoma
insertion: lateral coronoid, ramus angle |
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Term
| medial pterygoid is involved in closing/elevation what is the origin and insertion |
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Definition
origin: pterygoid plate, palatine, maxilla
insertion: medial ramus-angle |
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Term
| the temporalis is active in closing/elevation what is the origin and insertion |
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Definition
origin: temporal bone
insertion: anteritor coronoid and ramus |
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Term
| lateral pterygoid is resposible for protrusion of mandible, a rotary motion pulls the disc forward. what is the origin and insertion |
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Definition
origin: inferior head-lateral pterygoid plate
superior head-sphenoid
insertion: neck of condyle and capsule |
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Term
| what are the phases of jaw movement |
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Definition
begins at rest
rotation 1st of the hinge/ condyle
anterior translation/ sliding
during translation the disk moves more posterior in relation to the condyle |
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Term
| TMJ is often associated with these conditions |
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Definition
| depression, rheumatoid arthritis, chronic fatigue, chronic headaches, fibromyalgia, sleep disturbances, irritable bowel syndrome |
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Term
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Definition
direct-assault
indirect-whiplash
secondary to parafunctional habits like bruxism, clenching |
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Term
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Definition
trauma
stress/psychosocial factors
growth disorders condylar hypoplasia/hyperplasia
systemic conditions like rheumatoid arthritis
iatrogenic |
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Term
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Definition
orofacial pain
joint noise
restricted jaw function |
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Term
internal derangement
disc displacement with reduction
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Definition
disk is displaced anteriorly and returns to normal position on opening of mough of movement away from affected side. |
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Term
Internal derangement
disc displacement without reduction |
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Definition
displaced disk is an obstacle to the sliding condyle
intermittent jaw locking
stiffness in morning |
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Term
this pain accounts for 50% of TMJ patients
most commonly affects masseter muscles
characterized as dysfunctional muscle hyperactivity with pain, tenderness, malocclusion |
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Definition
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Term
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Definition
immobility of condyle due to fibrous or bony union between articulating structures.
joint infection after trauma accounts for 50% of tmj ankylosis
30% result from trauma without infection |
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Term
| most common type of ankylosis tmj |
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Definition
fibrotic intra articular
it is trauma induced hemorrhage is common cause
children more prone to this |
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Term
when one or both of the condyls translates anterior to articular eminence an open lock happens.
what is the term for this?
key: to fix problem apply downward and posterior pressure |
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Definition
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Term
| hypermobility where pt is able to relocate the mandible back into glenoid fossa |
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Definition
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Term
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Definition
inflammation of a joint
it can be either osteoarthritis or rheumatoid arthritis |
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Term
degenerative joint disease
most common affecting TMJ
dysfunctional articular remodeling leads to degenerative changes
may have pain worse at night, limited opening, muscle splinting, and crepitus. |
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Definition
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Term
inflammatory, immunologic disorder of joints
50-75% with rheumatoid arthritis have involvment of TMJ
pain is worse in morning. |
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Definition
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Term
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Definition
chin-tmj
falling as a child can stunt condyle and lead to micrognathia or TMJ issues |
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Term
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Definition
condylar fracture impacts function of tmj
max and mand fractures traumatic or surgical can create occlusal disharmony and lead to tmj issues |
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Term
neoplasia and tmj
tumors are rare what are some? |
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Definition
osteoblastoma
chondroblastoma
osteoma |
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Term
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Definition
most common benign neoplasm of synovium
metaplastic highly cellular cartilagous foci in synovial membrane
degenerative changes with osteoarthritis
swelling, pain, limited movement |
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Term
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Definition
phase 1: physical therapy, soft diet, medications nsaids, muscle relaxants, botulinium toxin
occlusal adjustments, ortho
phase 2: occlusal appliances, botox b has been used to treat sever bruxism by providing muscle relaxation and capsule inflammation
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Term
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Definition
minimally invasive
lavage joint with needle
releases disk and adhesions and reduces viscosity of synovial fluid and washes out inflammatory mediators.
83% success rate |
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Term
| arthrotomy open joint surgery |
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Definition
disk repositioning, replacement or excission
condylar repositioning
recontouring articular surfaces of condyle and glenoid fossa
total joing reconstruction (prosthetic device or autogenous graft) |
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Term
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Definition
| removal of articular eminence of temporal bone |
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Term
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Definition
musculoskeletal pain and fatigue
ache all over
women
low pain threshold |
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