type : bicondylar synovial

bones: head of mandible , manndibular fossa of temporal bone, and artecular tubercle

structure : the arteculating bones are enclosed within a fibrous capsule and attached to its inner side a thick white fibrocartlage that separtes the joint cavity in to two spaces

movement;

elevation of mandible = closure of mouth ---all muscles of mastication except lateral pterygoid

depresion of mandible =opening of the mouth ---- lateral pterygoid

protraction ---all muscles of mastication except temporalis

retraction-----temporalis

side to side -----the medial and lateral pterygoids

ligaments:

lateral ligament of TMJ : attached from the artecular tubercle to the lateral side of the neck of mandible

it is the strongest ligament and prevent posterior dislocation of the mandible

stylomandibular ligament: from styloid process to angle of mandible ( condensed deep fascia)

sphenomandebular ligament : from spine of sphenoid to lingula of mandible (embryological remains of the 1st pharyngeal arch)

pterygo mandebular ligament: from pterygoid hamulus to mylohyoid line

islocation: commmon anterior due to yawing or masive openning in dental procedures

reduction: done by depression followed by retraction

	Created by youssef shoukry over 5 years ago

Note on the tempromandbular joint, created by youssef shoukry on 26/10/2018.