골격성 3급 부정교합 환자에서 하악지시상분할골절단술 후 3D CT 영상을 이용한 하악과두 위치변화 분석
THE EVALUATION OF THE POSITIONAL CHANGE OF THE MANDIBULAR CONDYLE AFTER BILATERAL SAGITTAL SPLIT RAMUS OSTEOTOMY USING THREE DIMENSIONAL COMPUTED TOMOGRAPHY IN SKELETAL CLASS III PATIENTS
장정록, 최근호, 박영준, 김방신, 유민기, 국민석, 박홍주, 유선열, 오희균,
소속 상세정보
장정록 ( Jang Jung-Rok ) - 전남대학교 치의학전문대학원 구강악안면외과학교실
최근호 ( Choi Guen-Ho ) - 전남대학교 치의학전문대학원 구강악안면외과학교실
박영준 ( Park Young-Jun ) - 전남대학교 치의학전문대학원 구강악안면외과학교실
김방신 ( Kim Bang-Sin ) - 전남대학교 치의학전문대학원 구강악안면외과학교실
유민기 ( Yu Min-Gi ) - 전남대학교 치의학전문대학원 구강악안면외과학교실
국민석 ( Kook Min-Suk ) - 전남대학교 치의학전문대학원 구강악안면외과학교실
박홍주 ( Park Hong-Ju ) - 전남대학교 치의학전문대학원 구강악안면외과학교실
유선열 ( Ryu Sun-Youl ) - 전남대학교 치의학전문대학원 구강악안면외과학교실
오희균 ( Oh Hee-Kyun ) - 전남대학교 치의학전문대학원 구강악안면외과학교실
KMID : 0355620090350050316
Abstract
Purpose: This study was performed to evaluate three-dimensional positional change of the condyle using 3D CT after bilateral sagittal split ramus osteotomy (BSSRO) in skeletal class III patients.
Patients and methods: Nine patients who underwent BSSRO for mandibular set-back in skeletal class III malocclusion without facial asymmetry were examined. Miniplates were used for the fixation after BSSRO. 3-D CT was taken before, immediately after, and 6 months after undergoing BSSRO. After creating 3D-CT images using V-works 4.0TM program, axial plane, coronal plane, & sagittal plane were configured. Three dimensional positional change, from each plane to the condyle, of the nine patients was measured before, immediately after, and 6 months after undergoing BSSRO.
Results: 1. The mean value of mandibular set-back for nine mandibular prognathism patients was 7.36 mm (± 2.42 mm). 2. In the axial view, condyle is rotated inward immediately after BSSRO (p < 0.05), comparing with preoperative but outward 6 months after BSSRO comparing with postoperative (p < 0.05). 3. In the axial view, condyle is moved laterally immediately after BSSRO (p < 0.05), comparing with preoperative but regressed 6 months after BSSRO comparing with preoperative (p > 0.05). 4. In the frontal & coronal view, there is changed immediately after and 6 months after BSSRO, comparing with preoperative but no statistical difference.
Conclusion: These results indicate that three-dimensional positional change of the condyle in skeletal class III patients is observed lateral displacement & inward rotation immediate after BSSRO, but the condyle in 6 months after BSSRO tends to regress to preoperative position.
키워드
BSSRO;Condyle;Skeletal class III;Computed tomography
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