A Review of Subjects with Jaw Deformities in Japan

Abstract

Orthognathic treatments are used in patients with jaw deformities to improve stomatognathic function and facial appearance. This review considered 27 articles reporting on subjects with jaw deformities in Japan. We considered reports from medical facilities and our database of patients with skeletal malocclusion in the Division of Orofacial Functions and Orthodontics, Kyushu Dental University. Results suggest that： 1. The total number of subjects had previously been increasing, but has plateaued in recent years. 2. There were previously more females than males, but the ratio of males has started to increase in recent years. 3. The mean age at surgery has risen. 4. The number of double jaw and maxillary surgeries has increased, but mandibular surgery has decreased. 5. The most common bone fixation technique after sagittal split ramus osteotomy has changed from wire to plate, through screw-fixation.