A Case of Posterior and Anterior Disc Displacement with Mandibular Prognathism Improved after Intraoral Vertical Ramus Osteotomy

Abstract

In this paper, a mandibular prognathism with posterior disc displacement in TMJ performed intraoral vertical ramus osteotomy (IVRO) was reported. The patient was an 18-year-old female with the chief complaint of difficulty in mouth closing. Posterior disc displacement in left TMJ and anterior disc displacement in right TMJ were found by MRI examination. Although splint therapy and arthrocente-sis in left TMJ were performed, the symptoms did not change. This patient underwent IVRO after preoperative orthodontic treatment. After sugery, bilateral disc position and the symptoms of difficulty in mouth opening and TMJ pain were improved.