The TMJ capsular ligament is the fibrous reinforcement of the joint capsule on its lateral aspect, essentially the same structure as the lateral temporomandibular ligament — the primary restraining ligament of the TMJ.
Prevents excessive inferior, posterior, and lateral displacement of the mandibular condyle. The oblique fibres limit excessive condylar descent, while horizontal fibres resist posterior condylar displacement.
Spraining of the TMJ capsular ligament from acute trauma (blow to the chin, endotracheal intubation, prolonged dental procedures) produces acute TMJ pain and restricted opening. Management includes soft diet, NSAIDs, and limited jaw movement.
Acute ligament injury from trauma producing TMJ pain, swelling, and restricted opening, managed conservatively with soft diet and NSAIDs.
TMJ capsular damage from excessive mouth opening during difficult endotracheal intubation, producing post-operative trismus and joint pain.
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