三种口内扫描仪在确定颜色方面的准确性：一项体外研究。
The accuracies of three intraoral scanners with regard to shade determination: An in vitro study.
机构信息
Center of Digital Dentistry, Faculty of Prosthodontics, Peking University School and Hospital of Stomatology, National Center of Stomatology, National Clinical Research Center for Oral Disease, 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, NMPA Key Laboratory for Dental Materials, Beijing, China.
Department of Prosthodontics, Peking University School and Hospital of Stomatology, National Center of Stomatology, National Clinical Research Center for Oral Disease, 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, NMPA Key Laboratory for Dental Materials, Beijing, China.
出版信息
J Prosthodont. 2023 Jun;32(5):111-117. doi: 10.1111/jopr.13571. Epub 2022 Aug 10.
PURPOSE
To compare the accuracies of three intraoral scanners for shade determination function in vitro, and to preliminarily investigate the shade-matching characteristics of the three intraoral scanners.
MATERIALS AND METHODS
The shade of the middle third region of each shade tab on the Vita Classical A1-D4 shade guide (VC) was measured with a spectrophotometer (Vita Easyshade V, VE) and three intraoral scanners, including CEREC Omnicam (OM), 3Shape TRIOS 3 (T3), and TRIOS 4 (T4). A conversion table between VC values and CIELAB values was established from the database of VE to analyze the trueness. The reproducibility of the instruments was then compared by repeating the measurements five times.
RESULTS
The mean color difference for each instrument was highest in the OM, followed by the T4, and lowest in the T3 and VE, respectively. The L and a value for OM, and the b value for T4, were significantly different from those for VE (p <0.05). The reproducibility of the instrument was highest in the VE (Fleiss' kappa: 0.95), followed by the T3 (Fleiss' kappa: 0.89), T4 (Fleiss' kappa: 0.87), and OM (Fleiss' kappa: 0.78).
CONCLUSIONS
Of the three intraoral scanners, the trueness was best on the T3. The reproducibility of all the instruments was excellent.
目的
比较三种口腔内扫描仪在体外比色功能的准确性，并初步研究三种口腔内扫描仪的比色匹配特征。
材料与方法
采用分光光度计（Vita Easyshade V，VE）和三种口腔内扫描仪，包括 CEREC Omnicam（OM）、3Shape TRIOS 3（T3）和 TRIOS 4（T4），分别测量 Vita Classical A1-D4 比色指南（VC）中间三分之一区域每个色标片的颜色。从 VE 的数据库中建立 VC 值与 CIELAB 值之间的转换表，以分析准确性。然后通过重复测量五次来比较仪器的可重复性。
结果
每种仪器的平均色差以 OM 最高，其次是 T4，最低的是 T3 和 VE。OM 的 L 和 a 值以及 T4 的 b 值与 VE 显著不同（p <0.05）。VE 的仪器重现性最高（Fleiss' kappa：0.95），其次是 T3（Fleiss' kappa：0.89）、T4（Fleiss' kappa：0.87）和 OM（Fleiss' kappa：0.78）。
结论
在三种口腔内扫描仪中，T3 的准确性最好。所有仪器的重现性均极佳。
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