Hong Ji-Suk, Park Yang-Ho, Kim Yoon-Ji, Hong Soon-Min, Oh Kyung-Min
Department of Orthodontics, Kangdong Sacred Heart Hospital, Hallym University Medical Center, GangDong-Gu, Seoul, Korea.
J Oral Maxillofac Surg. 2011 Nov;69(11):e401-8. doi: 10.1016/j.joms.2011.02.011. Epub 2011 May 14.
It has often been hypothesized that mandibular setback surgery causes narrowing of the pharyngeal airway. We examined whether the pharyngeal airway narrowed after orthognathic surgery in patients undergoing either mandibular setback surgery or bimaxillary surgery and whether the amount of narrowing of the pharyngeal airway was any different after mandibular setback surgery or bimaxillary surgery.
Cone-beam computed tomography scans were obtained for 21 patients who were assigned to either mandibular setback surgery or bimaxillary surgery. The anteroposterior dimension, lateral width, cross-sectional area, and volume of each subject's pharyngeal airway were measured before and after surgery.
The pharyngeal airway showed significant narrowing after both mandibular setback surgery and bimaxillary surgery. The amount of change in the anteroposterior dimension and cross-sectional area on the posterior nasal spine plane and the length of the pharyngeal airway showed significant differences between the 2 groups.
The amount of narrowing of the pharyngeal airway was smaller in patients undergoing bimaxillary surgery than in the patients undergoing mandibular setback surgery.
人们常常假设下颌后缩手术会导致咽气道变窄。我们研究了接受下颌后缩手术或双颌手术的患者在正颌手术后咽气道是否变窄，以及下颌后缩手术或双颌手术后咽气道变窄的程度是否存在差异。
对21例分配接受下颌后缩手术或双颌手术的患者进行锥形束计算机断层扫描。在手术前后测量每个受试者咽气道的前后径、横向宽度、横截面积和容积。
下颌后缩手术和双颌手术后咽气道均出现明显变窄。两组在鼻后棘平面的前后径和横截面积变化量以及咽气道长度方面存在显著差异。
接受双颌手术的患者咽气道变窄程度小于接受下颌后缩手术的患者。
