A case of coronoidectomy simulated using threedimensional models and surgical guide for severe trismus caused by bilateral coronoid hyperplasia

摘要: Abstract Hyperplasia of the mandibular coronoid process is a clinical condition that causes an indolent trismus by elongated processes impinge on zygomatic medial surface when opening mouth. We report case hyperplasia in which 3D printer was used to create jaw model and surgical guide for performing bilateral coronoidectomy, i.e., simulated surgery before actual surgery, with good results. The patient 60-year-old man who had since adolescence. did not improve many years; hence, he referred our department. His temporomandibular joint movements were normal. Panoramic radiographs CT images showed extension muscular beyond arch, diagnosed process. Therefore, we considered preoperative simulation necessary perform operation more safely. setting resection line prepared. evaluated morphology coronoidectomy. maximum mouth after intraoperative 43 mm. training continued, at 6 months postoperatively 30 mm. Thus, believe could be performed reliably preparing preoperatively, simulation, creating template.