National Center for Stomatology & National Clinical Research Center for Oral Disease & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Department of Orthodontics, Peking University School and Hospital of Stomatology, No. 22 Zhongguancun South Avenue, Haidian District, Beijing, 100081, People's Republic of China.
National Center for Stomatology & National Clinical Research Center for Oral Disease % National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Center of Digital Dentistry, Peking University School and Hospital of Stomatology, No. 22 Zhongguancun South Avenue, Haidian District, Beijing, 100081, People's Republic of China.
BMC Oral Health. 2023 Feb 16;23(1):104. doi: 10.1186/s12903-023-02798-2.
The aim of this study was to compare the perceptual difference of smile aesthetics between 2D photographs and 3D dentofacial images as perceived by orthodontists and graduate students.
Forty-eight subjects finished orthodontic treatment were recruited with 2D photographs of frontal, oblique and lateral views as well as 3D dentofacial images. Twelve senior orthodontists and 13 postgraduate students were asked to rate the 2D and 3D smile simulations based on visual analog scale (VAS) and to vote for smile features that affect the attractiveness of smile. At the end, they completed a questionnaire about their views on different smile simulations. Wilcoxon signed-rank, Bland-Altman analysis, and multiple linear regression were used to compare the ratings and votes of smile perception between raters and between records.
Orthodontists and postgraduate students rated smile consistently with 2D photographs, while orthodontists tended to give a higher rate for unattractive smiles and a lower rate for attractive smiles with 3D dentofacial images. The 3D dentofacial images were rated significantly lower than 2D photographs and the voting of most of the smile features showed significant negative main effect on VAS scores, while the effect of demographic characteristics of raters, voting on visible width of upper dentition and buccal corridor was not significant. In addition, a significant negative main effect of commissure and facial profile was found on the rating discrepancy between 2D and 3D images.
Senior orthodontists tend to perceived 3D images more conservatively in smile evaluation. 3D dentofacial images were rated lower than 2D photographs and most of the smile features affect the aesthetic perception of smile. The perceptual difference of commissure and facial profile contributed to the lower ratings in 3D dentofacial images.
本研究旨在比较正畸医生和研究生对 2D 照片和 3D 面像感知的微笑美学差异。
招募 48 名完成正畸治疗的患者，提供正面、斜位和侧位的 2D 照片以及 3D 面像。12 名资深正畸医生和 13 名研究生根据视觉模拟量表（VAS）对 2D 和 3D 微笑模拟进行评分，并对影响微笑吸引力的微笑特征进行投票。最后，他们填写了一份关于不同微笑模拟看法的问卷。采用 Wilcoxon 符号秩检验、Bland-Altman 分析和多元线性回归比较了评分者和记录之间的微笑感知差异。
正畸医生和研究生对 2D 照片的微笑评价一致，而正畸医生对 3D 面像的不美观微笑评价较高，对美观微笑评价较低。3D 面像的评分明显低于 2D 照片，大多数微笑特征的投票对 VAS 评分有显著负向主效应，而评分者的人口统计学特征、对上颌切牙可见宽度和颊廊的投票影响不显著。此外，口角和面部轮廓对 2D 和 3D 图像评分差异有显著负向主效应。
资深正畸医生在微笑评估中更倾向于保守地看待 3D 图像。3D 面像的评分低于 2D 照片，大多数微笑特征影响微笑的审美感知。口角和面部轮廓的感知差异导致 3D 面像评分较低。
