A study of bone resorption at the posterior border of distal segment after bilateral sagittal split ramus osteotomy of manibular prognathic patients.
- Author:
Yong In LEE
1
;
Jong Hwan LIM
;
Kwang Seob NOH
;
Jong Rak HONG
;
Ju Hong JUN
;
Chang Soo KIM
Author Information
1. Department of Oral and Maxillofacial Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. hongjr@netian.com
- Publication Type:Original Article
- Keywords:
Mandibular prognathism;
Mandibular setback;
Sagittal split ramus osteotomy;
Distal segment;
Bone resorption
- MeSH:
Bone Resorption*;
Female;
Humans;
Male;
Mandible;
Osteotomy, Sagittal Split Ramus*;
Prognathism
- From:Journal of the Korean Association of Oral and Maxillofacial Surgeons
2005;31(1):55-59
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: This study is to predict the changes of the distal segment by investing the resorption of the excessive distal segment regarding the amount of setback after BSSRO. MATERIAL AND METHODS: 20 patients with Mandible prognathism treated by Obwegeser-Dal Pont method during the years 2000 to 2002 were selected for this study. Group A consisted of 5 males and 5 females with a setback amount of 10mm and above(Mean 10.80mm+/-1.03, n=20) and Group B consisted of 2 males and 8 females with a setback amount of below 10mm.(Mean 6.10mm+/-1.10, n=20) Panorama X-ray was taken at day 1, 1month, 3months, 6months, and 12months after the surgery. Resorption areas of excessive distal segment were measured on these panorama X-rays and compared. RESULTS: There was bone resorption in both groups. Group A showed more bone resorption than Group B. Group B showed slightly higher resorption rate than Group A. However, there was no statistically significant difference between the resorption rates of Group A and Group B. (P>0.05) CONCLUSION: More bone resorption occurred with a larger amount of setback and about one third of the excessive distal segment underwent resorption, irrespective of the amount of setback.
