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Thresholds of Abnormality Perception in Facial Esthetics among Laypersons and Dental Professionals: Frontal Esthetics

机译:拉德森和牙科专业人士面部美学中面部美学异常感知的阈值:正面美学

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Aim. To find thresholds at which laypersons and dental professionals perceive abnormalities in two facial frontal esthetics variables: facial symmetry and vertical harmony. Materials and Methods. A baseline frontal image of a young male face with optimum facial proportions was generated from a real image using a photo editing software. Different facial asymmetry images were then generated from this image by manipulating the chin point position at 2?mm increment to the left side. Vertical harmony was perceived through manipulating lower anterior facial height (LAFH) at a ratio of 2% of increased and decreased heights. A total of 120 raters divided equally into four groups of laypersons, general dental practitioners (GDPs), orthodontists, and oral and maxillofacial surgeons (OMFSs) rated these images using an analog scale of 100?mm long. Using ANOVA and Tukey post hoc tests at P0.05, the image that showed the first statistical difference compared to the baseline was considered as a threshold of abnormality. Results. The image of 4?mm asymmetry was defined by the laypersons and GDPs as the threshold of abnormality, while the orthodontists and OMFSs realized that at 2?mm. Laypersons and GDPs defined a threshold of 46% as an abnormal decrease in the LAFH and the other 2 groups at 48%. All dental professionals groups rated the image of 54% as an abnormal increase in the LAFH while laypersons perceived that at 56%. Conclusion. These thresholds regarding frontal esthetics may contribute to the process of establishing proper orthodontic treatment planning that suits the highest facial esthetic standards.
机译:目标。寻找在两个面部前列美学变量中的守卫和牙科专业人员感知的门槛:面部对称和垂直和谐。材料和方法。使用照片编辑软件从真实图像生成具有最佳面部比例的年轻男性面孔的基线正面图像。然后通过将下巴点位置以2Ωmm增加到左侧,从该图像产生不同的面部不对称图像。通过操纵下前面部高度(LAFH)以2%增加和降低的高度的比例来感知垂直和谐。总共120名评级均分为四组除去,一般牙科从业者(GDPS),矫正者和口腔和颌面外科医生(OMFSS)使用100Ωmm的模拟等级额定这些图像。使用ANOVA和TUKEY后HOC测试在P <0.05时,显示与基线相比显示第一个统计差异的图像被认为是异常的阈值。结果。由守卫和GDP定义4毫米不对称的图像作为异常的阈值,而矫正者和OMFS已经实现为2?mm。 Laypersons和GDP定义了46%的阈值,因为LAFH的异常降低,其他2组为48%。所有牙科专业人士群体均可评估54%的图像,因为LAFH的异常增加,而PATPERSONS被认为是56%。结论。关于额外美学的这些阈值可能有助于建立适当的正畸治疗计划,该计划适合最高的面部美学标准。

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