Abstract
Clinical and statistical analyses were performed on 416 patients who underwent orthognathic surgery at Yoshikawa Orthodontic Clinic from January 2011 to December 2020.
The results were as follows:
1．There were 81 male and 335 female patients （ratio 1: 4.13）. The mean age at first visit was 30.1 （male） years old and 28.3 （female） years old.
2．As the sources of referral of jaw deformity patients, 217 patients （52.2％） were referred by private general dental clinics.
3．The most common clinical diagnosis was mandibular prognathism （28.8％）, followed by mandibular prognathism and asymmetry （19.2％）.
4．The most frequently performed operation was the combination of Le Fort I osteotomy and sagittal split ramus osteotomy at 59.4％, followed by sagittal split ramus osteotomy （SSRO） at 16.6％.
5．Removal of the plate was performed on 381 patients （91.8％）.
6．Genioplasty was performed on 113 patients （27.2％）.
In surgical orthodontic treatment, an interdisciplinary approach with oral surgery allows a more flexible response to various cases.
