TEMPOROMANDIBULAR JOINT

 

Joint animation

DESCRIPTION: This joint articulation is between the mandibular fossa of the temporal bone superiorly and the condyle of the mandible inferiorly. The joint is covered by articular capsule, which is lined by synovial membrane. An intra-articular disc divides the joint into two cavities- upper part and lower part.

LIGAMENTS:

NERVE SUPPLY:

BLOOD SUPPLY:

         Maxillary artery

MOVEMENTS:

         Elevation: This is performed by the temporalis, masseter, and medial pteryoid.

         Depression: This is performed by the lateral pterygoid, the anterior and posterior bellies of digastric, geniohyoid and mylohyoid may aid this action especially when the mouth is opened against resistance.

         Protrusion: Lateral pterygoid and medial pteryoids.

         Retraction: Temporalis.

         Lateral movements: Medial pteryoid and lateral pterygoid. They act singly and not simultaneously.

Gallery

Depression

Elevation

Protrusion

Retraction

Skin

Interior

Bones

 


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Creator: Oluwole Ogunranti