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

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  • 洛和会音羽病院京都口腔健康センターにおける6年間の顎矯正手術症例の検討

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A survey was conducted on 516 cases of orthognathic surgery at Kyoto Oral Health Care Center, Rakuwakai Otowa Hospital from 2002 to 2008.<br>The results were as follows:<br>1.The total number of patients was 516 cases, approximately 40.2% of the total number of inpatients. The annual number of operations has markedly increased since 2002.<br>2. The male-female ratio was 1: 3.0.<br>3. The mean age was 25.8±7.6 years old.<br>4.The most predominant diagnosis was mandibular prognathism (33.9%).<br>5. Intraoral vertical ramus osteotomy (IVRO) only was performed in 18.2% of all cases, while sagittal split ramus osteotomy (SSRO) only was performed in 14.5%.<br>6. The mean operation time and blood loss in IVRO were 2 hr and 6 min and 71 g, and those in SSRO were 2 hr and 37 min and 157 g.<br>7. Osteosynthesis of bone fragments in SSRO was carried out with plate fixation by an intraoral system.<br>8. The mean duration of hospitalization was 6.7 days.<br>9. The introduction rate was 96.4%. The number of participating orthodontic dental clinics was 30.

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