Abstract: With the increasing demand for dental aesthetics，the role of researches on dental color difference thresholds has become prominent in clinical practice. Such researches offer a scientific basis for assessing dental aesthetics and serve as a critical reference for evaluating treatment outcomes，thereby holding practical value in increasing patient satisfaction and optimizing therapeutic efficacy. The article reviews the current research status of color difference thresholds in dentistry，including color spaces and color difference formulas，the definition of color difference thresholds and their influencing factors，and analyzes the research results of color difference thresholds for major dental restorative materials. The aim is to provide some references for selecting dental color difference thresholds in clinical and basic research to evaluate the clinical significance of research results. 

Key words: color difference, color difference threshold, color match, dentistry

摘要： 随着口腔美学要求的不断提高，口腔色差阈值的研究在临床实践中的作用日益突出。口腔色差阈值的研究不仅为牙齿美学的评估提供了科学依据，也为治疗效果的评价提供了重要参考，进而在提高患者满意度和优化治疗效果方面具有实际应用价值。文章就口腔色差阈值的研究现状（颜色空间及色差公式、色差阈值的定义及影响因素）做一阐述，并分析主要口腔修复材料的色差阈值研究结果，以期为临床和基础研究选用口腔色差阈值评价研究结果的临床意义提供参考。

关键词: 色差, 色差阈值, 比色, 口腔医学