Abstract

EGUIA DEL VALLE, A. et al. Bilateral coronoid hyperplasia: An uncommon pathology cause of temporomandibular disorders. Av Odontoestomatol [online]. 2011, vol.27, n.5, pp.241-244. ISSN 2340-3152.

Coronoid hyperplasia is an uncommon pathology characterized by an excessive uni or bilateral growth of the mandibular coronoid process. Since the first description by Langenbeck in the middle of the XIX century, many cases have been reported in the literature. In some cases patients are asymptomatic. Nevertheless, in most of them a limitation in the mouth movements can be observed, especially during the opening and protrusion movements. This limitation is caused by the impact of the coronoid process with the zigomatic bone. In this paper we present the case of a 30 years old male patient, without other medical history, that was remitted to our service because of the presence of severe pain in the temporomandibular area and a progressive limitation of the mouth opening. After the clinical exploration a radiographic exam was carried out. Based on them the patient was diagnosed of bilateral coronoid hyperplasia. We also review the most important aspects on this disease, especially those related to the differential diagnosis with other pathologies causing limitation of mouth movements. Coronoid hyperplasia must be always considered in the differential diagnosis in cases of progressive mouth movement limitation, although this is a really uncommon pathology.

Keywords : Coronoid hyperplasia; opening limitation; temporomandibular joint; temporomandibular disorders.

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