Congenital temporomandibular joint ankylosis

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Synonyms: Congenital trismus

Congenital temporomandibular joint ankylosis is a rare maxillofacial disorder characterized by significant reduction in mouth opening (i.e. from a few millimeters to a few centimeters) in the absence of acquired factors (e.g. trauma infection) contributing to the ankylosis. It is associated with variable degrees of facial dysmorphism (i.e. lateral deviation of the mandible and chin lower facial asymmetry retrognathia micrognathia dental malocclusion) and patients typically present with feeding and breathing difficulties. Developmental delay hypotonia seizures and additional dysmorphic features (e.g. pectus excavatum low-set ears hypoplastic alae nasi) have also been reported.

Data from Orphanet are used to provide information on a disease's name, synonym(s), and overview. Reference: Access aggregated data from Orphanet at Orphadata. Orphadata: Free access data from Orphanet. © INSERM 1999. Available on http://www.orphadata.org. Data version June 2024

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