Physiological positioning strategy alters condylar position after mandibular ramus sagittal split osteotomies for mandibular prognathism
Physiological positioning strategy alters condylar position after mandibular ramus sagittal split osteotomies for mandibular prognathism
复制标题
DOI：
10.1080/08869634.2017.1314432
复制
发表时间：
2018-01-01
影响因子：
1.6
通讯作者：
Asahina, Izumi
中科院分区：
文献类型：
--
作者：
Ohba, Seigo;Ozaki, Hiroya;Asahina, Izumi
目的：探讨下颌前突患者下颌近端运动的生理位置。方法：对22例下颌前突患者采用双侧下颌矢状裂支截骨术（SSRO）进行正颌手术治疗。评估骨骼稳定性，并通过术前，术后立即和术后1年的头颅造影和计算机断层扫描评估近端节段的运动。结果：将患者分为两组：稳定组（SNB复发= 1.5度）。稳定组术后1年SNB复发率平均仅为0.29度（7%），髁突头向后移动0.75 mm，近端逆时针旋转1.2度。结论：与术前相比，这种新的生理定位策略改善了下颌前突患者髁突的位置。
Objective:The aim of this study was to elucidate the physiological position of the proximal segment for postoperative jaw movement in patients with mandibular prognathism.Methods:Twenty-two patients with mandibular prognathism were treated by orthognathic surgery using bilateral mandibular sagittal split ramus osteotomies (SSRO) with a physiological positioning strategy. The skeletal stability was assessed, and the movement of the proximal segment was evaluated by cephalography and computed tomography performed preoperatively, immediately postoperatively, and one year postoperatively.Results: The patients were divided into two groups: the stable group (SNB relapse = 1.5 degrees). In the stable group at one year postoperatively, the average SNB relapse was only 0.29 degrees (7%), the condylar head had moved posteriorly by 0.75 mm, and the proximal segment had rotated counterclockwise by 1.2 degrees.Conclusion: This new physiological positioning strategy improves the position of the condyle compared with the preoperative position in patients with mandibular prognathism.