TMJ ankylosis release followed by mandibular distraction osteogenesis: is there a need for coronoidectomy?

Abstract

Unilateral TMJ ankylosis occurring in childhood can lead to both serious functional problems and marked facial deformity. Restricted mouth opening can cause difficulties in maintaining oral health and may also limit the amount and type of food eaten. Inhibition of growth on the ankylosed side together with continued growth from the unaffected condyle can often lead to both vertical and horizontal dentofacial discrepancies. Coronoidectomy of the hypertrophied coronoid process on the affected side has traditionally been recommended as part of the operation to release TMJ ankylosis to improve opening and prevent relapse.