TMD 2

Question 1

discuss the TMJ (3)

Answer 1

• synovial joint
• formed by articulation of condylar process of mandible and mandibular fossa of temporal bone
• articular disc separates the bones and divides the joint into upper and lower joint cavities

Question 2

what movements do the upper and lower joint cavities allow

Answer 2

upper - gliding (lateral)
lower - rotation (elevation and depression)

Question 3

what are the 3 extracapsular ligaments which support the TMJ

Answer 3

lateral temperomandibular ligament
sphenomandibular ligament
stylomandibular ligament

Question 4

how is mouth opening measured

Answer 4

by measuring interincisal distance with ruler or willis bite gauge
less than 35mm is considered limited opening

Question 5

what are 3 pieces of conservative advice you may give to a patient with TMD

Answer 5

• soft foods - nothing too chewy or crunchy
• avoid chewing gum
• decrease caffeine intake
• application of heat to muscles may help
• jaw exercises

Question 6

what type of splints may be used in TMD patients

Answer 6

michigan, bite raising appliance, hard splint, soft splint
should cover all occlusal surfaces of an entire arch

Question 7

what muscle of mastication cant be reliably tested

Answer 7

medial pterygoid

Question 8

subluxation of TMJ

Answer 8

‘open lock’ patient can self reduce disc to close their mouth

Question 9

luxation of TMJ

Answer 9

‘open lock’ where patient unable to self reduce disc and clinician required to close mouth via manipulation