Wen Chao, Ye Hongqiang, Chen Hu, Zhou Yongsheng, Huang Mingming, Sun Yuchun
Center of Digital Dentistry, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health, Beijing, PR China.
Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, PR China.
J Adv Prosthodont. 2022 Feb;14(1):1-11. doi: 10.4047/jap.2022.14.1.1. Epub 2022 Feb 25.
The maximum width between the mesial and distal labial transitional line angles, described as "esthetic width" herein, could significantly influence the visual perception of the teeth and smile. This study aimed to conduct biometric research on esthetic width and to explore whether regular distribution exists in the esthetic width of human teeth.
A total of 4,264 maxillary and mandibular anterior teeth were measured using the Geomagic studio software program. The proportions of maxillary to mandibular homonymous teeth and proportions between the adjacent teeth were calculated. Bilateral symmetry and the correlation between the esthetic and mesiodistal widths were both accounted for during the measurement procedures.
The mean esthetic widths were 6.773 ± 0.518 mm and 4.329 ± 0.331 mm for maxillary and mandibular central incisors, respectively, 5.451 ± 0.487 mm and 5.008 ± 0.351 mm for maxillary and mandibular lateral incisors, respectively, and 3.340 ± 0.353 mm and 5.958 ± 0.415 mm for maxillary and mandibular canines, respectively. Except for the mandibular canines, no significant difference in esthetic width was found among homonymous teeth from the same jaw. A high linear correlation was found between the esthetic and mesiodistal widths of the same tooth, except for the maxillary canines. Esthetic width proportions among different tooth categories showed some regular patterns, which were similar to those of the mesiodistal width.
Esthetic width is regularly distributed among the teeth in the Chinese population. This could provide an important reference for anterior dental restorations and dimension recovery in esthetic reconstruction of anterior teeth.
本文中描述的近中与远中唇侧移行线角之间的最大宽度，即“美学宽度”，会显著影响牙齿和笑容的视觉感知。本研究旨在对美学宽度进行生物测量研究，并探讨人类牙齿美学宽度是否存在规律分布。
使用Geomagic studio软件程序测量了总共4264颗上颌和下颌前牙。计算了上颌与下颌同名牙的比例以及相邻牙齿之间的比例。在测量过程中考虑了双侧对称性以及美学宽度与近远中宽度之间的相关性。
上颌中切牙的平均美学宽度分别为6.773±0.518毫米和下颌中切牙为4.329±0.331毫米，上颌侧切牙为5.451±0.487毫米和下颌侧切牙为5.008±0.351毫米，上颌尖牙为3.340±0.353毫米和下颌尖牙为5.958±0.415毫米。除下颌尖牙外，同一颌骨的同名牙之间美学宽度无显著差异。同一颗牙的美学宽度与近远中宽度之间存在高度线性相关性，但上颌尖牙除外。不同牙类之间的美学宽度比例呈现出一些规律模式，与近远中宽度的模式相似。
美学宽度在中国人群的牙齿中呈规律分布。这可为前牙修复及前牙美学重建中的尺寸恢复提供重要参考。
