Mandibular reconstruction using AO plates.

Abstract

The AO plate represents an acceptable reconstructive choice for mandibular defects, with an 86.7 percent success rate demonstrated in this series. Because this method utilizes an alloplast which is precisely and quickly applied, virtually all patients requiring mandibular resection can be considered candidates for reconstruction. Adequate vascularized soft tissue coverage is essential to prevent plate extrusion and fistula formation. This is even more important for radiated patients. The pectoralis major myocutaneous flap provides muscle and skin for large anterior defects. Frequently, lateral defects can be closed primarily without using regional flaps. We suggest bone reconstruction to avoid potential plate fracture and to allow placement of functional dentures. Resections in elderly patients and for palliation will result in ideal cosmetic and functional results with the plate alone. If we exclude the four patients reconstructed with calcium hydroxyapatite and the AO plate, the morbidity rate is quite acceptable. With this group excluded, only four fistulas and eight plate exposures occurred. Only four plate removals were required to achieve wound closure. Evaluation of the titanium plate is in progress. It is hoped that better osseous and soft tissue integration will help to decrease wound complications. A large prospective review of postoperative radiotherapy patients using the new titanium plate has been designed to address this issue. The therapeutic choice between the AO plate and free vascularized bone graft reconstruction remains. The decision process is dependent on the technical skills of the surgeon, the treatment plan, the survival characteristics of the tumor, and the physiologic condition of the patient.