A Clinical Survey of Orthognathic Surgeries in the Kyoto Oral Health Care Center, Rakuwakai Otowa Hospital for the Last 14 Years

A clinical survey was conducted on 1,180 cases of orthognathic surgery at Kyoto Oral Health Care Center, Rakuwakai Otowa Hospital from 2008 to 2022. The results were as follows: 1．The total number of patients was 1,180 cases for the last 14 years, and the average annual number was 84.4. 2．The male-female ratio was 1:2.8. 3．The mean age was 27.5 years old. 4．The most common clinical diagnosis was maxillary retrusion and mandibular protrusion, accounting for 276 cases. 5．The most frequently performed operation was the combination of Le Fort Ⅰ osteotomy （LF） and intraoral vertical ramus osteotomy （IVRO）, accounting for 297 cases, followed by the combination of LF and sagittal split ramus osteotomy （SSRO） at 241 cases. 6．The mean operation time and mean amount of bleeding were 286 minutes and 92g in LF＋IVRO, and 337 minutes and 133g in LF＋SSRO. 7．The number of cases of inferior alveolar nerve sensory disturbance after IVRO was less than that after SSRO or intraoral inverted L ramus osteotomy （ILRO）. The disorders by IVRO or ILRO were completely resolved within 1 year after surgery. 8．The mean duration of hospital stay was 7.5 days. 9．The number of referral clinics and hospitals from 2008 to 2022 was 53.