Change in condylar position in posterior bending osteotomy minimizing condylar torque in BSSRO for facial asymmetry
Change in condylar position in posterior bending osteotomy minimizing condylar torque in BSSRO for facial asymmetry
复制标题
DOI：
10.1016/j.jcms.2013.05.021
复制
发表时间：
2014-06-01
影响因子：
3.1
通讯作者：
Hwang, Soon Jung
中科院分区：
文献类型：
--
作者：
Yang, Hoon Joo;Hwang, Soon Jung
在下颌骨矢状劈开截骨术（SSRO）矫正不对称下颌骨时，不可避免地会发生近、远段骨性干扰。这导致髁突的位置改变。为了避免这种情况，引入了后路弯曲截骨术（PBO）。这是SSRO后第二磨牙后方的额外垂直截骨术。为研究SSRO联合PBO术后髁突位置的变化，选取22例面部不对称患者，根据SSRO术后骨性干扰的去除方法分为两组：PBO组（n = 13）和磨削组（n = 9）。通过模拟手术估计骨干扰的体积，将每组再分为大骨干扰组和小骨干扰组。通过三维叠加法评价髁突位移，并计算髁突位移量。髁突的位置变化在每个患者中是可变的。当比较PBO组和磨削组中具有较大骨干扰的患者时，磨削组的髁突显著向内旋转（p < 0.05）。磨削方法可用于去除小的骨干扰，髁突扭矩可耐受。然而，PBO将有利于纠正大的骨干扰，同时最大限度地减少髁扭矩。(C)2013年欧洲颅颌面外科协会。由爱思唯尔有限公司出版。保留所有权利。
During the correction of an asymmetric mandible with sagittal split ramus osteotomy (SSRO), bony interference between the proximal and distal segments inevitably occurs. This results in positional change of the condyle. In order to avoid this, a posterior bending osteotomy (PBO) has been introduced. This is an additional vertical osteotomy posterior to the second molar after SSRO. To investigate the change in condylar position after SSRO with PBO, 22 patients with facial asymmetry were enrolled and divided into two groups based on the surgical method used to remove the bony interference after SSRO: PBO (n = 13) and the grinding method (n = 9). Each group was subdivided into large and small bony interference groups by estimating the volume of bony interference with simulation surgery. Condylar displacement was evaluated by three-dimensional superimposition and the amount of condylar displacement was calculated. The positional changes of the condyles were variable in each patient. When comparing patients with large bony interference in the PBO and grinding groups, the condyles were significantly inwardly rotated in the grinding group (p < 0.05). The grinding method can be used to remove small bony interferences with tolerable condylar torque. However, PBO would be beneficial in correcting large bony interferences while minimizing condylar torque. (C) 2013 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.