A survey was carried out on the cases of sagittal split ramus osteotomy (SSRO) in the Nagano Red Cross Hospital.
The results were as follows:
1. SSRO was performed on 270 patients from 1986 to 2009.
2. The mean age at surgery was 22±5.8 years old.
3. The male-female ratio was 1:2.3.
4. The diagnosis of mandibular prognathism was made for most patients (76.3%).
5. Osteosynthesis of bone fragments was done as follows: 55 patients by wire fixation, 61 patients by fixation with titanium miniplate, and 154 patients by fixation with bioabsorbable miniplate.
6. The mean operation time was 113±34 min.
7. The mean amount of bleeding was 284±205 g.
8. Blood transfusion was done in 6 cases (2.2%).
9. The incidence of surgical complications was as follows: inferior alveolar nerve disturbance occurred in 130 cases (48.1%), trouble of osteosynthesis in 25 cases (9.3%), unfavorable fracture in 17 cases (6.3%), and abnormal bleeding in 13 cases (4.8%).
10. Orthodontic treatment was done in 260 cases (96.3%).
11. The mean duration of hospital stay was 14.7±3.9 days.
