Clinical Study of Orthognathic Surgery in the Department of Stomatology, Tokyo Metropolitan Ohtsuka Hospital-History of Surgical Orthodontics-

A clinical study was carried out on 498 patients who underwent orthognathic surgery between July 1989 and March 2007 in our department.The results were as follows:1. The number of orthognathic surgery cases increased annually, exceeding 30 cases a year after 2000.2. The ratio of female patients was higher than that of males. Among age groups, the number of patients aged between 20 and 29 was the largest.3.Regarding the clinical diagnosis, the number of mandibular protrusion patients (212 cases) was the largest, accounting for 42.6%.4. Regarding surgical types, SSRO (361 cases) was the most freauent.accounting for 67.7%. The combineduse of LF-land SSRO was applied in 110 cases, accounting for 20.6%.5. Administration of anesthetics during surgery, which was performed based on the results of cause and effect analysis, was considered markedly useful for decreasing the amount of bleeding.6.Smooth treatment of maxillofacial deformity patients and various improvements to decrease complications during and after surgery were performed.Furthermore, due to the introduction of the critical path, effective treatment for patients was achieved, and the quality of care was improved.