BACKGROUND Orthognathic surgery includes improvement of morphology and function of occlusion as well as psychological perception and oral health-related quality of life (OHRQoL) of patients. The aim of this study was to determine the OHRQoL of patients with class III skeletal malocclusion before and after orthognathic surgery. MATERIALS AND METHODS A total of 112 skeletal class III patients including 39 (34.8%) males and 73 (65.2%) females participated in this descriptive quasi-experimental study in three groups: "prior to orthodontic treatment" (n = 25); "under orthodontic treatment and prior to surgery" (n = 65), and "after surgery" (n = 25). All patients filled out a demographic information questionnaire, the oral health impact profile-14 (OHIP-14), and the orthognathic quality of life questionnaire (OQLQ) under the supervision of the examiner. Data were analyzed using ANOVA, independent samples t-test, Mann Whitney test, and Kruskal-Wallis test. RESULTS OHRQoL summary score changed from 14.5 prior to orthodontic treatment to 23.4 prior to surgery and during orthodontic treatment to 5.4 after surgery. These OHRQoL changes were statistically significant (P < 0.001). CONCLUSIONS Orthognathic surgery matters to patients with class III skeletal malocclusion and significantly improves their OHRQoL.

中文翻译：

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正颌外科手术前后与III类骨骼错牙合患者的口腔健康相关的生活质量。

背景技术正颌外科手术包括改善患者的形态和闭塞功能以及患者的心理知觉和与口腔健康有关的生活质量（OHRQoL）。这项研究的目的是确定正颌外科手术前后Ⅲ类骨骼错位患者的OHRQoL。材料和方法共有112例III类骨骼肌患者，其中39例男性（34.8％）和73例女性（65.2％）参加了该描述性的准实验研究，分为三组：“正畸治疗之前”（n = 25）；“正畸治疗下和手术前”（n = 65）和“手术后”（n = 25）。所有患者均填写了一份人口统计学信息调查表，即口腔健康影响概况14（OHIP-14），以及在检查员的监督下进行的正颌生活质量调查表（OQLQ）。使用ANOVA，独立样本t检验，Mann Whitney检验和Kruskal-Wallis检验分析数据。结果OHRQoL的总分从正畸治疗前的14.5更改为手术前的23.4，而在正畸治疗期间的分数则从手术后的5.4更改为。这些OHRQoL变化具有统计学意义（P <0.001）。结论正颌外科手术对III类骨骼错（牙合）患者很重要，并且可以显着改善他们的OHRQoL。这些OHRQoL变化具有统计学意义（P <0.001）。结论正颌外科手术对III类骨骼错（牙合）患者很重要，并且可以显着改善他们的OHRQoL。这些OHRQoL变化具有统计学意义（P <0.001）。结论正颌外科手术对III类骨骼错（牙合）患者很重要，并且可以显着改善他们的OHRQoL。