Graduate Prosthodontics, Department of Prosthetic Dentistry, School of Dentistry, University of Sakarya, Sakarya, Turkey.
Department of Prosthetic Dentistry, School of Dentistry, University of Ataturk, Erzurum, Turkey.
J Esthet Restor Dent. 2020 Jul;32(5):480-486. doi: 10.1111/jerd.12595. Epub 2020 Jun 28.
To determine the effects of different gingival margin asymmetries of anterior tooth on the smile esthetic perceptions of dentists, prosthodontists, periodontists and lay people.
A frontal close-up smile photo of a woman was used in this study. Image was digitally altered in order to create gingival margin asymmetries in left maxillary central, lateral incisors, and canines. Four stages of alterations were made in 0.5 mm increments. The final images were randomly assessed by 240 evaluators: 60 dentists, 60 prosthodontists, 60 periodontists, and 60 lay people. Questionnaire was carried out by a single researcher and each rater was asked to evaluate the attractiveness of the smile images by using the visual analog scale. Collected data were analyzed by using one-way ANOVA test with post hoc Scheffé test.
Smiles with 0.5 mm gingival margin asymmetries were found to be more esthetic, while 2 mm gingival asymmetries were less esthetic (P ˂ .001). Lay people's esthetic scores were higher than other groups in all degrees of asymmetries (P ˂ .001). Esthetic scores of canine teeth were higher than, lateral, and central teeth (P ˂ .001).
As the amount of asymmetries increased, esthetic scores decreased in all groups. Gingival margin asymmetries were less perceptible laterally.
This study may help dental professionals to understand which gingival asymmetries are found by patients as esthetic or unesthetic and guides them in their dental treatment, especially in the aesthetic zone.
确定上前牙不同牙龈边缘不对称对牙医、修复学家、牙周病学家和非专业人士的微笑美观感知的影响。
本研究使用了一名女性的正面特写微笑照片。通过数字手段改变图像，在左上颌中切牙、侧切牙和尖牙处创建牙龈边缘不对称。以 0.5mm 的增量进行了四个阶段的改变。最终的图像由 240 名评估者随机评估：60 名牙医、60 名修复学家、60 名牙周病学家和 60 名非专业人士。由一名研究人员进行问卷调查，要求每位评估者使用视觉模拟量表评估微笑图像的吸引力。收集的数据通过单向方差分析和事后 Scheffé 检验进行分析。
发现 0.5mm 牙龈边缘不对称的微笑更美观，而 2mm 牙龈不对称的微笑则不美观（P ˂.001）。在所有不对称程度上，非专业人士的美学评分均高于其他组（P ˂.001）。尖牙的美学评分高于侧切牙和中切牙（P ˂.001）。
随着不对称程度的增加，所有组的美学评分都降低。牙龈边缘不对称在侧面不太明显。
本研究可以帮助牙科专业人员了解患者认为哪些牙龈不对称是美观或不美观的，并指导他们的牙科治疗，特别是在美学区域。
