Anatomy

verhnyaya zadiskovaya plate 3.nizhnyaya zadiskovaya plate 4.zadnyaya ligament capsule 5.perednyaya ligament capsule 6.verhny beam lateral pterygoid 7.nizhny beam lateral pterygoid 8.sustavnaya surface 9.verhnyaya glenoid cavity glenoid cavity 10.nizhnyaya 11.svyazka Anatomy of the TMJ disc 1.myschelok 2.peredny cushion of articular disc 3.srednyaya Zone articular disk articular disk 4.zadny cushion 5.sustavnoy tubercle 6.naruzhny auditory canal 7.lateralnaya pterygoid distinctive anatomical characteristics of the TMJ: a) the joint surfaces of bones are covered with fibrocartilage, not hyaline; b) the lower jaw has teeth, the shape and location of which affect the character of motion of joints, and c) left and right joints function as a unit; disturbances of movement in one of them reflected in the nature of movements in the other, d) complete dependence on the nature of intra-relationship of occlusion and the state of the masticatory muscles, and e) joint capsule is attached inside the mandibular fossa, and not for glenoid fossa, as in other joints; g) the presence of intra-articular disc. Distinctive functional characteristics of the TMJ: The combination of translational and rotational motions. Any movement in the joint begins with slip joint head of the posterior slope of the articular tubercle, then joins the rotational motion around a horizontal axis of the head..

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