Fujita Tadashi, Shirakura Maya, Koh Myongsun, Itoh Goshi, Hayashi Hidetaka, Tanne Kazuo
Dr T. Fujita, Department of Orthodontics and Craniofacial Developmental Biology, Hiroshima University Institute of Biomedical & Health Sciences, Hiroshima, Japan.
J Orthod. 2013 Dec;40(4):313-7. doi: 10.1179/1465313313Y.0000000056.
The aim of this study was to investigate changes in the lip-line in asymmetrical cases treated with mandibular osteotomy alone.
Retrospective study.
Hiroshima University Institute of Biomedical & Health Sciences, Hiroshima, Japan
The subjects in this study consisted of 30 patients with an altered lip-line inclination who underwent isolated mandibular osteotomy (bilateral or unilateral sagittal split ramus osteotomy or intraoral vertical ramus osteotomy) as part of their surgical correction. Frontal cephalograms and facial photographs, taken at the first examination and after treatment, were used to measure changes in the inclination of the lip-line and cant of the occlusal plane, as well as the lateral deviations of hard and soft tissue Menton.
Inclination of the lip-line after active treatment was significantly improved compared with that before treatment. Menton on the hard and soft tissues after active treatment also experienced a significant improvement compared with its position at first examination.
One-jaw mandibular osteotomy is able to improve the inclination of the lip-line even in the presence of an occlusal cant. The inclination of the lip-line is corrected in association with sufficient lateral movements of Menton on the mandible.
本研究旨在调查仅采用下颌骨截骨术治疗的不对称病例中唇线的变化。
回顾性研究。
日本广岛大学医学生物与健康科学研究所
本研究的受试者包括30例唇线倾斜度改变的患者，他们接受了单独的下颌骨截骨术（双侧或单侧矢状劈开下颌支截骨术或口内垂直下颌支截骨术）作为手术矫正的一部分。在首次检查时和治疗后拍摄的正面头颅侧位片和面部照片，用于测量唇线倾斜度和咬合平面倾斜度的变化，以及硬组织和软组织颏点的横向偏移。
积极治疗后的唇线倾斜度与治疗前相比有显著改善。积极治疗后的硬组织和软组织颏点与其首次检查时的位置相比也有显著改善。
单颌下颌骨截骨术即使在存在咬合平面倾斜的情况下也能够改善唇线倾斜度。唇线倾斜度的矫正与下颌骨颏点的充分侧向移动相关。
