This article describes two different surgical procedures for recurrent temporomandibular joint dislocation: eminectomy preserving the posterior slope of the eminence and augmentation eminoplasty with a newly designed titanium plate and artificial bone complex. After non-surgical attempts at prevention of dislocation failed, surgical intervention was considered. Both procedures were performed under general anesthesia with nasotracheal intubation.

　Eminectomy preserving the posterior articular slope: Surgical resection of the anterior articular slope required precise cuts with piezoelectric surgery. The slope was removed with an angled-up cutting surface from the inferior border of the zygomatic arch to the lower end of the eminence. The advantages of this surgical procedure were its relative simplicity and maintenance of the posterior functional surface.

　Augmentation eminoplasty: The newly designed titanium plate has high mechanical strength. However, plate augmentation alone without artificial bone coverage caused anterior condylar bone resorption. The plate covered with the artificial calcium phosphate bone was used to avoid condylar resorption. The artificial bone has high compressive strength. The complex fixed with the zygomatic arch prevented dislocation without any plate fracture or artificial bone breakage.

　There were no major disadvantages of these procedures. The postoperative course was uneventful, with a stable joint state.

　Both procedures are reliable for the management of recurrent temporomandibular joint dislocation.