Mandibular Hypomobility Caused by Coronoid Hyperplasia in Artrogryposis Multiplex Congenita: Two Case Reports and Literature Review

Mandibular hypomobility results from various disorders affecting the stomatognathic system. Arthrogryposis multiplex congenita (AMC) is an uncommon systemic disorder with mandibular hypomobility involved. Notably few cases of AMC with limited mouth opening and reduced range of jaw movement have been described in which this restriction has been attributed to involvement of the coronoid process. The cases diagnosed as AMC with mandibular hypomobility caused by coronoid hyperplasia are presented to highlight the clinical and three dimensional cone beam computed tomography findings of AMC patients.