Comparative study of postoperative stability between conventional orthognathic surgery and a surgery-first orthognathic approach after bilateral sagittal split ramus osteotomy for skeletal class III correction.
10.5125/jkaoms.2017.43.1.23
- Author:
Deuk Hyun MAH
1
;
Su Gwan KIM
;
Ji Su OH
;
Jae Seek YOU
;
Seo Yun JUNG
;
Won Gi KIM
;
Kyung Hwan YU
Author Information
1. Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea. sgckim@chosun.ac.kr
- Publication Type:Comparative Study ; Original Article
- Keywords:
Deformity;
Prognathism
- MeSH:
Congenital Abnormalities;
Humans;
Mandible;
Orthognathic Surgery*;
Osteotomy, Sagittal Split Ramus*;
Prognathism;
Recurrence
- From:Journal of the Korean Association of Oral and Maxillofacial Surgeons
2017;43(1):23-28
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVES: The purpose of this study is to compare the postoperative stability of conventional orthognathic surgery to a surgery-first orthognathic approach after bilateral sagittal split ramus osteotomy (BSSRO). MATERIALS AND METHODS: The study included 20 patients who underwent BSSRO for skeletal class III conventional orthognathic surgery and 20 patients who underwent a surgery-first orthognathic approach. Serial lateral cephalograms were analyzed to identify skeletal changes before surgery (T0), immediately after surgery (T1), and after surgery (T2, after 1 year or at debonding). RESULTS: The amount of relapse of the mandible in the conventional orthognathic surgery group from T1 to T2 was 2.23±0.92 mm (P<0.01) forward movement and −0.87±0.57 mm (non-significant, NS) upward movement on the basis of point B and 2.54±1.37 mm (P<0.01) forward movement and −1.18±0.79 mm (NS) upward movement on the basis of the pogonion (Pog) point. The relapse amount of the mandible in the surgery-first orthognathic approach group from T1 to T2 was 3.49±1.71 mm (P<0.01) forward movement and −1.78±0.81 mm (P<0.01) upward movement on the basis of the point B and 4.11±1.93 mm (P<0.01) forward movement and −2.40±0.98 mm (P<0.01) upward movement on the basis of the Pog. CONCLUSION: The greater horizontal and vertical relapse may appear because of counter-clockwise rotation of the mandible in surgery-first orthognathic approach. Therefore, careful planning and skeletal stability should be considered in orthognathic surgery.
