tmj histology

The muscle of mastication that attaches to the neck of the condyle and to the capsule of the TMJ is :

• Medial Pterygoid

• Temporalis

• Masseter

• Lateral pterygoid

The intra-articular disk is confluent posteriorly with retro-discal tissues that have the following features:

• Avascular

• Trauma causes inflammation

• Aneural

• not elastic

Crimping of collagen fibers in the articular disk provides :

• Instability

• Rigidness

• Allows elongation of fibres before tensile stresses

• Reduced surface area

The two movements of the temporomandibular joint (TMJ) are:

• Anterior and posterior

• medial and lateral

• Gliding and hinge

• Superior and inferior

The synovial cavities are divided by the articular disc. The lower joint cavity is involved in rotation or hinge type movement while

The superior joint cavity is involved in :

• Translation

• rotational movements

• hinge movement

• articular movement