T.M.J. (Temporomendibular joint)

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T.M.J. (Temporomendibular joint)

Type: condylar type of synovial joint.

Bones: Temporal and mandible.

Ligaments: Capsular ligament and temporomendibular ligament.

TMJ, temporomandibular joint, joint TMJ
Articular surface of the left temporomendibular joint


Movements: 

Protraction - pterigoid muscle

Retraction  - Digastric muscle, Massater muscle.

Dipration (Opening of mouth) - Lateral pterigoid muscle, infra hyoid muscle, digastric muscle.

Elevation of mandible - All muscles of the mastication.

Side to side movement of mandible -ipsilateral
pterigoid acting alternately.
Capsule of TMJ, Fibrous capsule and lateral ligament of the TMJ
Fibrous capsule and lateral ligament of the temporomandibular joint




Nerve supply: auriculo temporal nerve, Massetric nerve.

Applied: 
1. Dislocation.
2. Fracture.
3. Damage to auriculotemporal nerve.

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