State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
J Oral Rehabil. 2010 Jul;37(7):501-8. doi: 10.1111/j.1365-2842.2010.02080.x. Epub 2010 Mar 10.
The labial groove-textures of upper central incisors were defined and explored to imitate the elaborate groove-textures for aesthetic restorations. In the current study, 158 upper central incisors were selected from 79 volunteers aged from 19 to 24 and recruited from Sichuan University in Chengdu of China. The length, width, depth, combination and distribution of the horizontal and vertical grooves on the labial surface were investigated by an optical measurement method, based on the Shadow Moiré technology and Temporal Fourier analysis. Vertical grooves were confirmed to be present in 94% of the samples and horizontal grooves in 77%. Perfect symmetry was shown in the vertical grooves of the same tooth, as well as in the homonymous teeth. The majority of horizontal grooves were distributed in the proximity of the cervical fourth and the middle of the crown. Based on the combination and distribution of the grooves, eight basic labial groove-texture types of maxillary central incisors were classified. The subtle morphological characters of natural teeth could be recorded by the new method, and it could also provide the minute groove-texture for dentists and technicians to achieve an aesthetic appearance for a restoration.
上中切牙的唇面沟纹特征被定义并加以研究，以模仿精细的沟纹，用于美学修复。本研究从中国成都四川大学招募的 79 名年龄在 19 至 24 岁的志愿者中选取了 158 颗上中切牙。采用光学测量方法，基于阴影云纹技术和时间傅里叶分析，研究了上中切牙唇面水平和垂直沟纹的长度、宽度、深度、组合和分布。94%的样本中存在垂直沟纹，77%的样本中存在水平沟纹。同一颗牙的垂直沟纹具有完美的对称性，同名牙也是如此。大多数水平沟纹分布在颈部四分之一和牙冠中部附近。根据沟纹的组合和分布，将上颌中切牙的基本唇面沟纹类型分为 8 种。该新方法可以记录天然牙的细微形态特征，也可以为牙医和技师提供微小的沟纹结构，以实现修复体的美观效果。
