2022 Volume 85 Issue 1 Pages 39-44
Surgical orthognathic treatment is a large part of oral surgery. This paper is a clinical and statistical study of 1556 patients who underwent orthognathic surgery in our department over the past 26 year period from April 1993 to March 2019. We compared the sex, age at surgery, surgical technique, operation time, and intraoperative blood loss for each year. In our study, April 1993 to March 2006 was considered Period I, and April 2006 to March 2019 was considered Period II. The total number of patients in Period I was 735, and there were 821 in Period II. The male to female ratio was almost 1:2, with 466 males and 1090 females, and there was no significant difference between the two periods. The youngest patient was 15 years of age and the oldest was 64. The majority of patients were between 10 and 40, with the largest group in their 20s in both Periods I and II.
The most common surgical procedure was the sagittal split ramus osteotomy (SSRO) in both Periods I and II, followed by two-jaw osteotomy. Compared to Period I, Period II saw a threefold increase in two-jaw osteotomy. The operative time was about 10-20 minutes shorter in Period II than in Period I. The amount of intraoperative blood loss did not differ significantly between the two periods. The number of cases of surgical orthodontic treatment for jaw deformities has been increasing in our department due to the increase in awareness of esthethics, especially among patients in their 30s and 40s. In addition, the number of cases of two-jaw osteotomy and genioplasty increased proportionately with the increase in the number of cases, with a trend toward a diversification of cases. Furthermore, we found that as the level of skill of the surgeons increased, while the operation times and blood loss decreased. Shika Igaku (J Osaka Odontol Soc) 2022; Mar; 85(1): 39-44.
