True bony TMJ ankylosis in children: Case report.

Introduction: The clinical importance of ankylosis in children is concerning with its massive effect and disturbance on the mandibular future growth causing gross deformity apart from the limited mouth opening. Trauma is the most common cause of bony and fibrous ankylosis. History, physical examination and radiographical examination of each patient with ankylosis of TMJ is mandatory in arriving to a final diagnosis, severity, involvement of adjacent structures and ultimately to plan the treatment.