Department of Dentistry, Ajou University School of Medicine, Suwon, Republic of Korea.
J Esthet Restor Dent. 2018 Sep;30(5):408-414. doi: 10.1111/jerd.12424. Epub 2018 Sep 29.
To investigate the distribution of natural tooth shades by age and gender in the Korean population with a spectrophotometer.
A total of 674 human subjects were recruited and divided into three age groups; young (16-30), middle (31-59), and elderly (60-89). Each group was then subdivided according to gender. Color was measured on the upper central incisor and CIELab color coordinates were obtained. CIEDE2000 color differences ( ΔE ) between genders within each age group and between age groups for both genders were calculated. Two-way analysis of variance (ANOVA) was used to identify the influence of age and gender on each color variable.
The most frequent color in the Korean population was 2L1.5. L* values decreased, while b* values increased with age (P < .05). There was a significant interaction between gender and age on b* values; F (2668) = 3.489, P = .031, partial η = 0.010, and observed power = 0.652. Females generally have lighter and less chromatic central incisors compared to males. The ΔE values between genders in elderly groups were beyond acceptability threshold.
The central incisors were getting darker, more yellowish, and reddish with age. Information on the chromatic range of natural teeth by age and gender could help to select colors for esthetic dental restorations.
Dentists should consider an unacceptable color mismatch between the restorations and natural dentition that can occur over time.
使用分光光度计调查韩国人群中按年龄和性别分布的天然牙色。
共招募了 674 名受试者，分为三个年龄组；年轻组（16-30 岁）、中年组（31-59 岁）和老年组（60-89 岁）。然后根据性别将每个年龄组进一步细分。在上颌中切牙上测量颜色，并获得 CIELab 颜色坐标。计算每个年龄组内性别之间以及两性之间的 CIEDE2000 颜色差异（ΔE）。使用双向方差分析（ANOVA）确定年龄和性别对每个颜色变量的影响。
在韩国人群中最常见的颜色是 2L1.5。L值随着年龄的增长而降低，而 b值随着年龄的增长而增加（P < .05）。性别和年龄对 b*值的交互作用有显著影响；F（2668）=3.489，P = .031，偏η²=0.010，观察功率=0.652。与男性相比，女性的中切牙通常更浅且更不含色素。老年组中两性之间的 ΔE 值超过了可接受的阈值。
中切牙随着年龄的增长变得更暗、更黄、更红。了解年龄和性别对天然牙色的色度范围的信息可以帮助选择美学牙科修复体的颜色。
随着时间的推移，牙医应考虑修复体与天然牙之间可能出现不可接受的颜色不匹配。
