Kim-Pusateri Seungyee, Brewer Jane D, Dunford Robert G, Wee Alvin G
Department of Restorative Dentistry, School of Dental Medicine, State University of New York at Buffalo, Buffalo, NY 14214, USA.
J Prosthet Dent. 2007 Nov;98(5):353-8. doi: 10.1016/S0022-3913(07)60119-X.
There are several electronic shade-matching instruments available for clinical use; unfortunately, there are limited acceptable in vitro models to evaluate their reliability and accuracy.
The purpose of this in vitro study was to evaluate the reliability and accuracy of a dental clinical shade-matching instrument.
Using the shade-matching instrument (ShadeScan), color measurements were made of 3 commercial shade guides (VITA Classical, VITA 3D-Master, and Chromascop). Shade tabs were selected and placed in the middle of a gingival matrix (Shofu Gummy), with tabs of the same nominal shade from additional shade guides placed on both sides. Measurements were made of the central region of the shade tab inside a black box. For the reliability assessment, each shade tab from each of the 3 shade guide types was measured 10 times. For the accuracy assessment, each shade tab from 10 guides of each of the 3 types evaluated was measured once. Reliability, accuracy, and 95% confidence intervals were calculated for each shade tab. Differences were determined by 1-way ANOVA followed by the Bonferroni multiple comparison procedure.
Reliability of ShadeScan was as follows: VITA Classical = 95.0%, VITA 3D-Master = 91.2%, and Chromascop = 76.5%. Accuracy of ShadeScan was as follows: VITA Classical = 65.0%, VITA 3D-Master = 54.2%, Chromascop = 84.5%.
This in vitro study showed a varying degree of reliability and accuracy for ShadeScan, depending on the type of shade guide system used.
有几种电子比色仪可供临床使用；不幸的是，用于评估其可靠性和准确性的可接受的体外模型有限。
本体外研究的目的是评估一种牙科临床比色仪的可靠性和准确性。
使用比色仪（ShadeScan）对3种商用比色板（VITA经典比色板、VITA 3D-Master比色板和Chromascop比色板）进行颜色测量。选择比色片并将其放置在牙龈基质（松风牙龈模型）中间，两侧放置来自其他比色板的相同标称颜色的比色片。在黑箱内对比色片的中心区域进行测量。为进行可靠性评估，对3种比色板类型中的每种比色板的每个比色片测量10次。为进行准确性评估，对所评估的3种类型中每种类型的10个比色板的每个比色片测量1次。计算每个比色片的可靠性、准确性和95%置信区间。通过单因素方差分析和Bonferroni多重比较程序确定差异。
ShadeScan的可靠性如下：VITA经典比色板 = 95.0%，VITA 3D-Master比色板 = 91.2%，Chromascop比色板 = 76.5%。ShadeScan的准确性如下：VITA经典比色板 = 65.0%，VITA 3D-Master比色板 = 54.2%，Chromascop比色板 = 84.5%。
本体外研究表明，根据所使用的比色板系统类型，ShadeScan的可靠性和准确性程度各不相同。
