골격성 III급 부정교합 환자의 악교정 수술 후 하악 과두의 위치 변화에 관한 연구
THE CHANCES OF CONDYLAR POSITION AFTER ORTHOGNATHIC SURGERY IN PATIENTS WITH SKELETAL CLASS III MALOCCLUSION
윤형상, 백형선,
소속 상세정보
윤형상 ( Yoon Hyung-Sang ) - 연세대학교 치과대학 교정과학교실
백형선 ( Baik Hyoung-Seon ) - 연세대학교 치과대학 교정과학교실
KMID : 0361919920220040837
Abstract
The purpose of this study was to investigate the positional changes of the mandibular condyles after orthognathic surgery In patients with severe skeletal Class III malocclusion. This study was based on 21 patients who had received bilateral sagittal split osteotomy for mandibular setback. Among them 14 were fixated non - rigidly (W group), and 7 were fixated rigidly (R group). After submental vertex view analysis, each subject was given the T.M.J. Tomogram in both centric occlusion and centric relation immediate before, 4~6 weeks after and more than 6 months after surgery. The anteroposterior and vertical changes between each time interval were measured and analyzed statistically. Following results were obtained. 1. There was no significant difference between right and left condyles in their anteroposterior and vertical changes of the condylar position. 2. In anteroposterior changes of condylar position of the wire fixation group, the condyles were moved anteriorly 4-6 weeks after surgery, and then the pattern of reestablishment to their preoperative position was observed more than 6 months after surgery. In the rigid fixation group, there was no significant difference in any observation periods of centric occlusion and centric relation. 3. In vertical changes of condylar position of the wire fixation group. the condyles were moved inferiorly 4-6 weeks after surgery, and then the pattern of reestablishment to their preoperative position was observed more than 6 months after surgery. In the rigid fixation group, the condyles were moved inferiorly 4-6 weeks after surgery, and then the pattern of reestablishment to their preoperative position was observed more than 6 months after surgery in centric occlusion only.
키워드
sagittal split ramus osteotomy; rigid fixation; non-rigid fixation; condylar positon
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