Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
Department of Medicine and Surgery, University of Milan-Bicocca, Monza, Italy.
J Biol Regul Homeost Agents. 2017 Apr-Jun;31(2 Suppl 1):37-43.
The final outcome of dental treatment needs to be not only clinically sufficient, but also esthetically pleasing. Bilateral symmetry in the maxillary incisor teeth is of significant importance in esthetic dentistry. In restorative dentistry, symmetry refers to the appearance of balance around the dental midline. The purpose of this study was to measure and compare the maxillary incisor teeth dimensions from both sides of the dental midline, in order to asses if this symmetry occurs naturally. From the student community population at Tel Aviv University, 66 students between the ages of 20-35 (35 males, 31 females) were enrolled and gave consent. The inclusion criteria for this study were: upper maxillary incisors that have never undergone restorative or rehabilitative treatment, and no history of orthodontic treatment. Standardized digital photographs were taken, and the length and width of the maxillary central and lateral incisors were measured and proportions were calculated. SPSS was used to compare the measured differences between teeth on the left versus right of the midline. Tooth proportions were not significantly different between the left and right sides. Asymmetry was found only between the lengths of the maxillary lateral incisors (p=0.009); the width for these teeth was symmetrical. A significant statistical difference was not found on most parameters when evaluating symmetry of the upper incisors. Therefore, when treating the esthetically important anterior of the mouth, care must be taken to ensure bilateral symmetry to mirror the natural symmetry found in most patients.
牙科治疗的最终结果不仅需要临床充分，还需要美观。上颌切牙的双侧对称在美学牙科中非常重要。在修复牙科中，对称是指围绕牙中线的平衡外观。本研究的目的是测量和比较牙中线两侧的上颌切牙尺寸，以评估这种对称性是否自然发生。从特拉维夫大学的学生群体中，招募了 66 名年龄在 20-35 岁之间的学生（35 名男性，31 名女性），并获得了他们的同意。本研究的纳入标准为：从未接受过修复或康复治疗的上颌切牙，且无正畸治疗史。拍摄了标准化的数字照片，并测量了上颌中切牙和侧切牙的长度和宽度，并计算了比例。使用 SPSS 比较了牙中线左右两侧牙齿的测量差异。左右两侧牙齿的比例没有显著差异。仅在上颌侧切牙的长度上发现了不对称（p=0.009）；这些牙齿的宽度是对称的。在评估上颌切牙的对称性时，大多数参数没有发现显著的统计学差异。因此，在治疗口腔美学重要的前部时，必须注意确保双侧对称，以反映大多数患者自然存在的对称性。
