摘要目的:分析不同人群对女性面下1/3侧貌审美评价的差异，为正畸临床提供参考。方法:选取3张不同垂直骨面型（均角、低角、高角）且侧貌美观协调的女性侧面像（河南省口腔医院正畸科完成治疗的患者资料）作为模板图像。水平前移或后移模板图像的上唇突点（UL点），改变UL点到E线的水平距离（distance to E line，DE），UL点位于E线前方DE值计为正，反之计为负，获得DE值分别为-5、-4、-3、-2、-1、0、1、2、3、4 mm的侧貌图像；每种骨面型获得10张，共30张，作为调查资料。选择正畸患者[2019年6至9月于河南省口腔医院正畸科就诊的成年正畸患者144例，男性66例，女性78例，年龄（29.4±7.7）岁]和正畸医师[2019年6月参加河南省口腔医院正畸科学术交流会的正畸医师和正畸研究生138名，男性60名，女性78名，年龄（32.2±7.1）岁]作为调查对象，对30张侧貌图像进行审美评价，选择是否接受每张侧貌图像为美观侧貌，计算各侧貌图像的接受率，设定接受率>60%为可接受侧貌，统计可接受侧貌的DE值范围；并筛选每种骨面型图像中最美观侧貌，计算最美观侧貌选择率；并进行Kruskal-Wallis分析和卡方检验。结果:总人群、正畸患者、正畸医师接受率最大的侧貌DE值均为-2 mm，最美观侧貌选择率最大的侧貌DE值亦均为-2 mm。正畸患者与正畸医师对30张侧貌图像的总接受率差异无统计学意义（ P>0.05）。相同调查人群对3种垂直骨面型侧貌的接受率差异均有统计学意义（ P均 <0.01），总人群对均角、高角和低角骨面型侧貌的接受率分别为62.1%（1 752/2 820）、55.4%（1 563/2 820）和33.5%（946/2 820），可接受侧貌的DE值范围分别为-4~2 mm，-2~2 mm和-2~-1 mm。 结论:本组调查人群接受率最高、评价最美观的侧貌DE值为-2 mm；正畸患者与正畸医师对侧貌的审美评价趋于一致。垂直骨面型对侧貌审美有影响，不同骨面型的接受率及可接受侧貌的DE值范围由大到小依次为均角、高角和低角骨面型。

abstractsObjective:To evaluate lower facial profile in females in different skeletal patterns.Methods:Investigation pictures of three females with beautiful lower facial profiles from Department of Orthodontics, Henan Stomatological Hospital were collected. The skeletal patterns of these females were classified as average, low and high angle, respectively.Upper lip process point (UL) was moved backwards horizontally to reach towards the E line and go even further gradually in above pictures. The distance changed according to E line was defined as DE value. If UL was in front of E line,DE value was denoted as positive, or else negative. Collectively, we obtained 30 pictures (10 pictures in each skeletal facial type) with different DE values (-5, -4, -3, -2, -1, 0, 1, 2, 3, 4 mm), which were divided into average, low and high angle group according to the skeletal facial type. The pictures were evaluated by 144 randomly-selected adult orthodontic patients [66 males, 78 females, aged (29.4±7.7) years] who visited Department of Orthodontics, Henan Stomatological Hospital from June to September, 2019 and 138 orthodontists (including qualified orthodontists and postgraduate orthodontic students [60 males, 78 females, aged (32.2±7.1) years] who participated orthodontics conferences in Henan Stomatological Hospital in June, 2019. The acceptance rate was calculated and rate above 60% was deemed as acceptable DE range. Evaluators were also asked to choose the most esthetic profiles for the best DE value in each skeletal facial type.Data discrepancy was analyzed using Kruskal-Wallis analysis and chi-square test. Results:Most accepted DE was -2 mm among total investigators including orthodonticpatients and orthodontists. There was no difference in total acceptance rate between orthodontists and patients ( P>0.05). There was statistic difference in total acceptance rate in different skeletal patterns between orthodontic patients and orthodontists ( P<0.05). In total investigators, total acceptance rate was 62.1% (1 752/2 820) in average angle group, 55.4%(1 563/2 820) in high angle group and 33.5%(946/2 820) in low angle group, respectively. Acceptable DE range in three facial types was -4~2 mm (average angle), -2~2 mm (high angle) and -2~-1 mm (low angle), respectively. Conclusions:According to the evaluation of both orthodontic patients and orthodontists, the best DE was-2 mm.Total acceptance rate and acceptable DE range ranked first in average angle group, second in high angle group and third in low angle group.