Singh H, Maurya R K, Kapoor P, Sharma P, Srivastava D
Department of Orthodontics and Craniofacial Orthopedics, ESIC Dental College and Hospital, Delhi, India.
Sultania Infantry Line, Bhopal Military Station, Bhopal, India.
Orthod Craniofac Res. 2017 Feb;20(1):8-20. doi: 10.1111/ocr.12135. Epub 2016 Nov 14.
To analyze the relationship between subjective and objective evaluations of pre-treatment posed smiles in patients with facial asymmetry and to assess the influence of dentofacial structures involved in asymmetry on the perception of smile attractiveness.
Thirty-five patients (25 males and 10 females) between 18 and 25 years of age with facial asymmetry were selected.
Pre-treatment clinical photographs of posed smiles were subjectively evaluated by a panel of 20 orthodontists, 20 oral surgeons, and 20 laypersons. A customized Smile Mesh program was used for objective evaluation of the same smiles. Direct comparison among three smile groups (unattractive, slightly attractive, and attractive) for different Smile Mesh measurements was carried out using two-way anova test. Additionally, linear regression was performed to evaluate whether these measurements could predict the attractiveness of captured smiles.
Patients with 'slightly attractive' smiles had a significantly greater distance between the incisal margin of the maxillary central incisor and the lower lip during smiling. The Smile Index was significantly greater in attractive smiles. However, based on the coefficients of linear regression, no objectively gathered measurement could predict smile attractiveness.
Attractiveness or unattractiveness of smiles in patients with facial asymmetry could not be predicted by any measurement of Smile Mesh. The presence of facial asymmetry did not significantly influence the perception of smile esthetics.
分析面部不对称患者治疗前摆位微笑的主观与客观评价之间的关系，并评估不对称中涉及的牙颌面结构对微笑吸引力感知的影响。
选取35例年龄在18至25岁之间的面部不对称患者（25例男性和10例女性）。
由20名正畸医生、20名口腔外科医生和20名非专业人员对面部不对称患者治疗前摆位微笑的临床照片进行主观评价。使用定制的微笑网格程序对相同的微笑进行客观评价。使用双向方差分析对不同微笑网格测量的三个微笑组（不吸引人、略有吸引力和吸引人）进行直接比较。此外，进行线性回归以评估这些测量是否可以预测所捕捉微笑的吸引力。
“略有吸引力”微笑的患者在微笑时上颌中切牙切缘与下唇之间的距离明显更大。有吸引力的微笑中微笑指数明显更高。然而，基于线性回归系数，没有任何客观收集的测量可以预测微笑的吸引力。
面部不对称患者微笑的吸引力或不吸引力无法通过微笑网格的任何测量来预测。面部不对称的存在并未显著影响对微笑美学的感知。
