Hyperplasia of the mandibular coronoid process: an analysis of 31 cases and a review of the literature

Abstract

Purpose: This study was undertaken to investigate the demographic and clinical features of mandibular coronoid hyperplasia and to assess the response to current treatments.

Patients and method: Case notes were studied and records made of age, sex, duration of symptoms, operative procedures, and response to treatment in all patients presenting at the Queen Victoria Hospital, East Grinstead, over a 20-year period from 1970 to 1990 with a confirmed diagnosis of mandibular coronoid hyperplasia.

Results: Thirty-one cases were recorded, 23 bilateral and 8 unilateral. The average age on presentation was 27.8 years for bilateral and 23.6 years for unilateral cases, with symptoms predating presentation by an average of 9 years and 6.75 years, respectively. Surgery was disappointing in terms of improving mouth opening.

Conclusion: The results of this large series are supported by meta-analysis of the previous literature. They suggest that surgical management may be improved by a greater understanding of the pathogenesis of this condition.