Seung-Hak Baek1, Tae-Kyung Kim, Myung-Jin Kim. 1. Department of Orthodontics, School of Dentistry, Dental Research Institute, Seoul National University, Seoul, South Korea.
Abstract
OBJECTIVE: This study was performed to compare the condylar position and angulation on 3-dimensional (3D) views between greater setback side (GSS) and lesser setback side (LSS) after asymmetric mandibular setback (AMS) using computed tomography. STUDY DESIGN: The sample consisted of 12 Korean skeletal class III malocclusion patients with mandibular prognathism and facial asymmetry, who underwent sagittal split ramus osteotomy (SSRO) with rigid fixation. Tomographs were taken 1 month before (T1) and 6 months after surgery (T2). Position and angulation of the condyles were measured. RESULTS: At T1 stage, the condylar head in GSS showed more forward inclination on the sagittal view (P < .05) than that of LSS. Although there were significant inward and backward rotations of the condylar head in GSS (P < .01) and significant backward rotation in LSS at T2 stage (P < .05), 3D positions of the condyle in GSS and LSS were not changed after AMS. CONCLUSION: SSRO might be effective to stabilize the condylar position for AMS.
OBJECTIVE: This study was performed to compare the condylar position and angulation on 3-dimensional (3D) views between greater setback side (GSS) and lesser setback side (LSS) after asymmetric mandibular setback (AMS) using computed tomography. STUDY DESIGN: The sample consisted of 12 Korean skeletal class III malocclusionpatients with mandibular prognathism and facial asymmetry, who underwent sagittal split ramus osteotomy (SSRO) with rigid fixation. Tomographs were taken 1 month before (T1) and 6 months after surgery (T2). Position and angulation of the condyles were measured. RESULTS: At T1 stage, the condylar head in GSS showed more forward inclination on the sagittal view (P < .05) than that of LSS. Although there were significant inward and backward rotations of the condylar head in GSS (P < .01) and significant backward rotation in LSS at T2 stage (P < .05), 3D positions of the condyle in GSS and LSS were not changed after AMS. CONCLUSION: SSRO might be effective to stabilize the condylar position for AMS.
Authors: Ju-Won Kim; Jong-Cheol Kim; Kyeong-Jun Cheon; Seoung-Won Cho; Young-Hee Kim; Byoung-Eun Yang Journal: Int J Environ Res Public Health Date: 2018-10-27 Impact factor: 3.390