Ghassemi M, Hilgers R-D, Fritz U, Modabber A, Ghassemi A
Department of Orthodontics, RWTH Aachen University, Aachen, Germany.
Department of Medical Statistics, RWTH Aachen University, Aachen, Germany.
Int J Oral Maxillofac Surg. 2017 Apr;46(4):483-489. doi: 10.1016/j.ijom.2016.11.017. Epub 2016 Dec 30.
A retrospective evaluation of maxillary advancement and mandibular setback in class III patients was performed and their aesthetic outcomes compared. Patients with a sella-nasion-A-point angle (SNA) of 80-84° were selected. Pre- and postoperative lateral cephalograms were obtained for 34 class III patients; these were divided into two groups according to the surgical procedure performed: mandibular setback group (n=17) and maxillary advancement group (n=17). The pre- and postoperative cervical length, lip-chin-throat angle, lower/upper lip thickness, distance from the lower/upper lip to the aesthetic line, soft tissue angle, facial contour angle, and nasolabial angle of the two groups were compared. Significant differences were observed for cervical length (P=0.0003) and sex (P=0.003) when comparing maxillary advancement with mandibular setback. Although the preoperative cervical length was similar in the two groups, it increased significantly after maxillary advancement and decreased after mandibular setback. In this study, the differences in aesthetic outcomes depending on the surgical procedure performed were considered. Some aesthetically important parameters proved to be superior after maxillary advancement when compared to mandibular setback, even with the maxilla in the normal position.
对III类患者的上颌前徙和下颌后缩进行了回顾性评估，并比较了其美学效果。选择蝶鞍-鼻根点-A点角（SNA）为80-84°的患者。为34例III类患者获取了术前和术后的头颅侧位片；根据所进行的手术程序将这些患者分为两组：下颌后缩组（n = 17）和上颌前徙组（n = 17）。比较了两组术前和术后的颈长、唇-颏-喉角、下唇/上唇厚度、下唇/上唇至美学线的距离、软组织角、面部轮廓角和鼻唇角。比较上颌前徙和下颌后缩时，观察到颈长（P = 0.0003）和性别（P = 0.003）存在显著差异。尽管两组术前颈长相似，但上颌前徙后颈长显著增加，下颌后缩后颈长减少。在本研究中，考虑了根据所进行的手术程序不同而产生的美学效果差异。一些美学上重要的参数在与下颌后缩相比时，即使上颌处于正常位置，上颌前徙后也被证明更优。
