Ligaments That Stabilize the Temporomandibular Joint

Several ligaments reinforce the TMJ and limit excessive movement. The lateral (temporomandibular) ligament is a thickening of the joint capsule that runs from the articular tubercle to the neck of the mandible. It primarily prevents posterior displacement of the condyle.

Two additional extracapsular ligaments—the sphenomandibular and stylomandibular—provide further support. The sphenomandibular ligament extends from the spine of the sphenoid to the lingula of the mandible, while the stylomandibular ligament connects the styloid process to the angle of the mandible.

Inside the joint, collateral (discal) ligaments attach the edges of the articular disc to the medial and lateral poles of the condyle, helping the disc move in concert with the bone. Together these structures maintain joint integrity during the rapid and forceful motions of chewing.

The arrangement of these ligaments reflects the dual hinge-and-glide nature of the joint, permitting necessary freedom of movement while protecting against dislocation under normal loads.

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