Bilateral coronoid hyperplasia requires surgery (coronoidectomy) to im
prove mouth opening. An intra-oral approach is preferred with direct f
ibre-optic anaesthetic intubation. Myotomy of the masseter muscle is r
ecommended in cases where fibrotic and calcifying effects have occurre
d. Pre-operative physiotherapy counselling and postoperative jaw exerc
ises are important to the final success of the management.