2020 Volume 32 Issue 2 Pages 72-76
We report a case of bilateral chronic dislocation of the temporomandibular joint with heterotopic osteoma treated by open reduction, eminectomy, discectomy, high condylectomy and tumor removal. A 39-year-old woman suffered cardiopulmonary arrest due to hanging suicide in March 2013. She was transported to our hospital emergency room and resuscitated, and then transferred to a chronic care hospital. Because reduction of repeated temporomandibular joint dislocation could not be done by the visiting dentist, she was referred to our department in September 2014. Her consciousness level was JCS (Japan coma scale) II-20, and a tracheostomy was performed at the first medical examination. She could not close her mouth, and the bilateral temporomandibular joint had collapsed. CT scan revealed that the bilateral mandibular condyles were located beyond the articular eminences and under the temporal fossa inside the zygomatic arch. In addition, discontinuous radiopaque findings were observed in the anterior and inward of the bilateral mandibular condyles. Based on the diagnosis of chronic dislocation of the temporomandibular joint and bilateral mandibular tumor, open reduction, eminectomy, discectomy, high condylectomy and tumor removal were performed under general anesthesia. The tumor was pathologically diagnosed with osteoma. Five years after surgery, no recurrence of dislocation has been noted.
