[Mouth oepning limitations due to coronoid-zygomatic-malar interference].

Interferences between coronoid process and bone walls of the zygomatic arch should always be considered among the causes of extra-ankylotic mouth-opening limitation. With the exception of traumatic cases, the event is rare and once correct diagnosis has been made there are excellent opportunities for treatment, largely of surgical nature. The zygomatic-malar area or coronoid process will be operated on depending on the case. When surgery has involved the coronoid process it is advisable to follow up with an adequate period of mechanotherapy.