OBJECTIVES To determine if patient outcome variables differ between conventional and virtual surgical planning of orthognathic surgery for class III asymmetry. MATERIAL AND METHODS This retrospective case-control study examined 95 patients with class III asymmetry who had been consecutively treated with at least a Le Fort I osteotomy and a bilateral sagittal split osteotomy with a surgery-first approach. Two groups were examined: 51 patients treated with conventional surgical planning and 44 with virtual surgical planning. After treatment, quantitative assessment was determined with measurements of midline symmetry, contour symmetry, and overall facial symmetry using standardized frontal photographs. Subject assessments were analyzed with questionnaires regarding self-perception of overall appearance, satisfaction with appearance, and quality of life. RESULTS Conventional and virtual surgical planning resulted in significant improvements in outcomes for all patients. However, facial midline and overall facial symmetry were significantly greater for the virtual compared with the conventional group. There were no significant differences in subjective measures of appearance, satisfaction with appearance, and quality of life for patients treated with conventional or virtual surgical planning; measures were high for both groups. CONCLUSIONS Conventional and virtual surgical planning of surgery-first bimaxillary orthognathic surgery resulted in quantitative and qualitative improvements in facial symmetry. Although patient satisfaction was similar for both approaches, virtual surgical planning was superior to conventional surgical planning for the improvement of midline and overall asymmetry. CLINICAL RELEVANCE Improvements with virtual surgical planning in facial midline, facial contour, and overall facial symmetry are as good as or better than conventional surgical planning.

中文翻译：

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传统的和虚拟的正颌外科手术计划的结果，采用手术优先的方法治疗III类不对称性。

目的确定III类不对称性的正颌外科常规手术和虚拟手术计划的患者预后变量是否存在差异。材料与方法这项回顾性病例对照研究检查了95位III级不对称患者，这些患者已通过手术优先方法至少接受了Le Fort I截骨术和双侧矢状劈开截骨术的连续治疗。检查了两组：51例接受常规外科手术治疗，44例接受虚拟外科手术治疗。治疗后，使用标准化的额头照片，通过测量中线对称性，轮廓对称性和整体面部对称性来确定定量评估。使用问卷调查表对受试者评估进行了分析，这些问卷调查涉及自我总体外观，对外观的满意度，和生活质量。结果常规和虚拟手术计划使所有患者的结局得到了显着改善。然而，与传统组相比，虚拟组的面部中线和整体面部对称性明显更高。采用常规或虚拟手术计划治疗的患者的主观外观，满意度和生活质量无显着差异。两组的措施都很高。结论常规的和虚拟的手术计划-首次双上颌正颌外科手术的计划，在面部对称性方面实现了数量和质量上的改善。尽管两种方法的患者满意度相似，虚拟手术计划在改善中线和整体不对称方面优于传统手术计划。临床相关性对面部中线，面部轮廓和整体面部对称性进行虚拟手术计划的改进与传统手术计划一样好或更好。