Ruan Chenglu, Xiong Jianying, He Xindie, Lin Jue, Wu Zhouhui, Li Beibei, Wang Lin
Attending, Department of Stomatology, Sanming Integrated Medicine Hospital, Sanming, Fujian, PR China.
Chief and Head of Department, Department of Stomatology, Sanming Integrated Medicine Hospital, Sanming, Fujian, PR China.
J Prosthet Dent. 2025 Apr;133(4):1081.e1-1081.e8. doi: 10.1016/j.prosdent.2025.01.005. Epub 2025 Jan 31.
Despite the importance of tooth color in smile esthetics, an understanding of how specific changes in L*, a*, and b* color parameters affect perceived smile attractiveness across different tooth positions is lacking. Additionally, the influence of evaluator characteristics on color perception remains unclear, making it challenging for clinicians to optimize color selection for anterior dental restorations.
The purpose of this study was to explore the relationship between color parameter changes, tooth positions, and attractiveness scores while considering the moderating effects of evaluator background, sex, and age.
The methodology involved using an imaging software program (Adobe Photoshop) to match the L*, a*, and b* values of central incisors, lateral incisors, and canines with the Vita 3D master color guide. By adjusting the colors based on the 26 color blocks of the guide, 26 images were created for evaluation. Dental students and nondental adults provided demographic information and rated the smile attractiveness of each picture on a scale of 0 to 10.
Changes in the 3 color parameters (Lab*) of anterior teeth significantly affected smile attractiveness (all P<.001), with the L* value having the greatest impact (coefficient=-0.78, P<.001). The rater's professional background (P<.001), sex (P=.003), and age (P=.001) played significant roles in moderating color perception and attractiveness evaluation. The study included 80 senior dental students (dental student group).
Changes in the L*, a*, and b* color parameters of anterior teeth significantly affected smile attractiveness (P<.001), with the L* value having the greatest impact. Color changes in central incisors showed the strongest effect on attractiveness scores, followed by those in canines and lateral incisors (P<.001). The professional background, sex, and age of evaluators significantly moderated color perception and attractiveness evaluation (P<.01), with dental students and female evaluators showing greater sensitivity to color changes.
尽管牙齿颜色在微笑美学中很重要，但目前仍缺乏对L*、a和b颜色参数的特定变化如何影响不同牙齿位置的微笑吸引力的理解。此外，评估者特征对颜色感知的影响仍不明确，这使得临床医生在优化前牙修复体的颜色选择方面具有挑战性。
本研究的目的是在考虑评估者背景、性别和年龄的调节作用的同时，探索颜色参数变化、牙齿位置和吸引力评分之间的关系。
该方法包括使用成像软件程序（Adobe Photoshop）将中切牙、侧切牙和尖牙的L*、a和b值与Vita 3D比色板进行匹配。通过根据比色板的26个色块调整颜色，创建了26张图像用于评估。牙科学生和非牙科成年人提供了人口统计学信息，并在0至10的量表上对每张图片的微笑吸引力进行评分。
前牙的3个颜色参数（Lab*）变化显著影响微笑吸引力（所有P<.001），其中L*值的影响最大（系数=-0.78，P<.001）。评估者的专业背景（P<.001）、性别（P=.003）和年龄（P=.001）在调节颜色感知和吸引力评估方面发挥了重要作用。该研究纳入了80名高年级牙科学生（牙科学生组）。
前牙的L*、a和b颜色参数变化显著影响微笑吸引力（P<.001），其中L*值的影响最大。中切牙的颜色变化对吸引力评分的影响最强，其次是尖牙和侧切牙（P<.001）。评估者的专业背景、性别和年龄显著调节了颜色感知和吸引力评估（P<.01），牙科学生和女性评估者对颜色变化表现出更高的敏感性。
