Pseudo-ankylosis of the temporomandibular joint due to hyperplasia of articular eminence: Rare case

摘要

Hyperplasia of articular eminence is a rare condition embedded in the structural incompatibility disorders of temporomandibular joint, where the joint surfaces are altered in shape, resembling a pseudo-ankylosis case. This disorder is normally associated with a history of trauma, leading to deviation of the condyle from its normal trajectory.In the present case, a 49-years-old male patient, complaining of mouth opening limitation and pre-auricular pain after a sport trauma in a soccer game (face vs. ball) 10 years ago. Clinically, presented a 15 mm mouth opening with left chin deviation associated with retrognathism and facial asymmetry. At the time of the examination, the patient had no pain in the temporomandibular joint or masticatory muscles. After clinical examination and imaging, a surgical treatment was proposed based on Kaban's protocol in which an eminectomy was performed followed by coronoidectomy, obtaining a 33 mm mouth opening after 14 months of follow up.