Abstract
Radiographs of 25 patients with true ankylosis of the temporomandibular joint were compared with those of a group of age- and sex-matched controls for radiologic signs of temporomandibular joint ankylosis. Antegonial notching, elongation of the coronoid processes, dento-alveolar compensation and altered posterior tooth position on the affected side were frequent findings. The degree of antegonial notching, elongation of coronoid processes, and dento-alveolar compensation were most conspicuous in those with childhood onset. In trauma-induced ankylosis, remnants of the articular meniscus appeared as a single, thin, radiolucent band, within the bone mass that joined the condylar head to the base of the skull, a feature which was absent in ankylosis resulting from infection.
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