Yu-Jin Jung1, Myung-Jin Kim, Seung-Hak Baek. 1. Department of Orthodontics, School of Dentistry, Dental Research Institute, Seoul National University, Seoul, South Korea.
Abstract
OBJECTIVE: To investigate the 3-dimensional (3D) changes in the hard and soft tissues of skeletal class III malocclusion (CIII) patients with or without facial asymmetry by mandibular setback surgery (MSS). STUDY DESIGN: Seventeen adult CIII patients treated with MSS (bilateral sagittal split ramus osteotomy) who had 3D computerized tomography taken 1 month before (T0) and 6 months after (T1) MSS, were allocated into group 1 (symmetry, menton deviation (MD) <4 mm; n = 8) or group 2 (asymmetry, MD >4 mm; n = 9). The landmarks and variables were measured with Rapidform 2006 (Inus Technology). RESULTS: Mandibular prognathism was significantly corrected in both groups. Facial asymmetry in group 2 was significantly corrected not only in the lower lip and chin but also in the philtrum deviation and mouth corner of the deviated side. The hard and soft tissue changes were more related in the horizontal and anteroposterior aspects than in the vertical one. CONCLUSION: Three-dimensional evaluation showed a significant difference in the hard and soft tissue changes between symmetric and asymmetric MSS.
OBJECTIVE: To investigate the 3-dimensional (3D) changes in the hard and soft tissues of skeletal class III malocclusion (CIII) patients with or without facial asymmetry by mandibular setback surgery (MSS). STUDY DESIGN: Seventeen adult CIII patients treated with MSS (bilateral sagittal split ramus osteotomy) who had 3D computerized tomography taken 1 month before (T0) and 6 months after (T1) MSS, were allocated into group 1 (symmetry, menton deviation (MD) <4 mm; n = 8) or group 2 (asymmetry, MD >4 mm; n = 9). The landmarks and variables were measured with Rapidform 2006 (Inus Technology). RESULTS: Mandibular prognathism was significantly corrected in both groups. Facial asymmetry in group 2 was significantly corrected not only in the lower lip and chin but also in the philtrum deviation and mouth corner of the deviated side. The hard and soft tissue changes were more related in the horizontal and anteroposterior aspects than in the vertical one. CONCLUSION: Three-dimensional evaluation showed a significant difference in the hard and soft tissue changes between symmetric and asymmetric MSS.
Authors: L K de Paula; A C O Ruellas; B Paniagua; M Styner; T Turvey; H Zhu; J Wang; L H S Cevidanes Journal: Int J Oral Maxillofac Surg Date: 2013-02-08 Impact factor: 2.789
Authors: Deepal Haresh Ajmera; Richard Tai-Chiu Hsung; Pradeep Singh; Natalie Sui Miu Wong; Andy Wai Kan Yeung; Walter Yu Hang Lam; Balvinder S Khambay; Yiu Yan Leung; Min Gu Journal: Clin Oral Investig Date: 2022-03-23 Impact factor: 3.606