Angle Orthod. 2021 Jan 1;91(1):54-60. doi: 10.2319/032020-200.1.
To evaluate the influence of a midline diastema on dentofacial esthetic perceptions of orthodontists, restorative dental specialists or prosthodontists, and laypersons in a frontal facial evaluation performed by means of video.
Two individuals aged between 20 and 25 years, one of each gender, with presence of a midline diastema were selected. An acrylic resin mockup was made of the maxillary anterior region, simulating ideal conditions of smile esthetics. Four standardized frontal view videos of the complete face were filmed of each individual in the following situations: with the ideal smile (unchanged mockup) and with the presence of midline diastemas of 0.5, 1.0, and 1.5 mm created by the mockup. In all videos, the patient said a certain sentence and, at the end, simulated a posed smile. Dentofacial esthetic perceptions of all four videos of each individual were evaluated by 51 orthodontists, 51 restorative dental specialists or prosthodontists, and 51 laypersons by means of visual analog scales. Data were evaluated using analysis of variance and Tukey post hoc test, with the level of significance set at 5%.
The most attractive videos for all groups of examiners were those without diastema and with a diastema of 0.5 mm, for both the woman and the man. For a diastema of 1 mm or 1.5 mm, the dentofacial characteristics were considered unesthetic.
Diastemas equal to or greater than 1 mm negatively influence dentofacial esthetics in a frontal facial evaluation performed by means of video.
通过视频正面评估，评价牙列中线间隙对正畸医生、修复牙科专家或修复科医生以及非专业人士对面部审美感知的影响。
选择了两名年龄在 20 至 25 岁之间的个体，男女各一名，存在牙列中线间隙。制作了上颌前区的丙烯酸树脂模型，模拟理想的微笑美学条件。对每个个体的四个标准化正面视图视频进行了拍摄，包括以下情况：理想微笑（不变的模型）和通过模型创建的 0.5、1.0 和 1.5 毫米中线间隙的存在。在所有视频中，患者都说了一句特定的话，最后模拟了一个摆好的微笑。由 51 名正畸医生、51 名修复牙科专家或修复科医生和 51 名非专业人士通过视觉模拟量表对每个个体的所有四个视频的牙颌面审美感知进行了评估。使用方差分析和 Tukey 事后检验对数据进行评估，置信水平设定为 5%。
所有检查者群体最吸引人的视频是没有间隙和间隙为 0.5 毫米的视频，无论是女性还是男性。对于 1 毫米或 1.5 毫米的间隙，牙颌面特征被认为不美观。
在通过视频进行的正面面部评估中，等于或大于 1 毫米的间隙会对牙颌面美观产生负面影响。
