TMJ Flashcards
Bones involved
- Temporalis
- Cranial bone
- articular eminence
- Mandible
- Facial bone
- Condyle
Joint capsule
Encloses the TMJ
Outside of the joint
Joint Disc
Separates the temporal bone and the mandibular condyle, within the joint
-The disc causes dysfunction
Margins of the disc is attached to the capsule
Temporomandibular joint ligament
From the zygomatic process down to the mandible
- doesn’t let the mandible move too far back
Stylomandibular ligament
Styloid process down to the mandible
Prevents the mandible from going too far forward
Sphenomandibular ligament
Sphenoid to the mandible
Prevents the mandible from going too far forward
Protrusion of the mandible
Gliding motion
brigs mandible forward
Bilateral contraction of the pterygoid
Retraction of the mandible
Gliding motion
Brings the mandible backwards
Bilateral contraction of temporalis
Depression of the mandible
Gliding and rotation motion
Works with protrusion
Suprahyoid muscles
Elevation off the mandible
Gliding and rotation
works with retraction
Masseter, medial pterygoid, temporalis
lateral deviation
Gliding and rotational
Lateral pterygoid (contract the right side jaw moves to the left)
Powerstroke
When the mandible is off to the side and then comes back to the midline
Resting postion
Teeth not touching
- Should only touch when chewing and swallowing
Bilateral palpation
open
close
deviate right
deviate left
protrude
Diagnosis to TMJ disorder
When the patient has tenderness and swelling
almost always muscular involvement
officially diagnosed with and MRI or pan
- the disc is thin and calcifying
