Department of Dental Prosthodontics and Materials Science, University of Leipzig, Liebigstraße 12, Leipzig, 04103, Germany.
Institute for Medical Informatics, Statistics, and Epidemiology (IMISE), Haertelstraße 16-18, Leipzig, 04107, Germany.
J Esthet Restor Dent. 2018 Sep;30(5):442-448. doi: 10.1111/jerd.12407. Epub 2018 Aug 25.
The objective of this study was to determine the potential impact of a positioning splint on the determination of the correct tooth color using VITA Easyshade 4 (VE4) or VITA Easyshade 5 (VE5) (VITA Zahnfabrik, Germany).
Dental students (n = 50) in their third year and one expert determined the tooth shade of an extracted human tooth using VE4 and VE5, in presence or absence of a positioning splint. The determined shade values (Lab*) were collected and the delta E was calculated. A statistical evaluation was performed with the program SPSS (P < .05).
There was no significant difference in the determination of the correct tooth color (VITA 3D-Master shade), independent from either the expert or the students positioning splint, and independent of using VE4 (P = 1; P = .092) or VE5 (P = .125; P = .25).
Using VE4 or VE5, a positioning splint has no effect on the determination of the correct tooth color (VITA 3D-Master shade). For an exact measurement of the Lab values in clinical studies, a positioning splint should be used. A person untrained in working with the devices can determine the correct tooth shade more frequently with VE5 than with VE4.© 2018 Wiley Periodicals, Inc.
Correctly determining the tooth shade is an essential treatment step in esthetic reconstructive dentistry. Color is probably one of the most important determinants of esthetics in dentistry. Factors such as lighting conditions, gender, age, experience, and color vision impairment affect the process of shade matching. These deficits brought about the desire for an objective and reproducible shade determination method with digital devices for shade determination. One of the most proven and frequently used digital shade determination devices is the "VITA Easyshade" (VITA Zahnfabrik, Bad Säckingen, Germany). At this point in time, there are no (published) reports on the measurement accuracy of the new VE 5. In addition, there are, as of yet, no investigations comparing the VE 4 and VE 5.
本研究旨在确定使用 VITA Easyshade 4（VE4）或 VITA Easyshade 5（VE5）（VITA Zahnfabrik，德国）时，定位夹板对确定正确牙齿颜色的潜在影响。
三年级的牙科学生（n=50）和一名专家在使用 VE4 和 VE5 时，有无定位夹板，确定一颗人拔牙的牙齿颜色。收集确定的颜色值（Lab*）并计算 delta E。使用 SPSS 程序进行统计评估（P<.05）。
无论专家还是学生使用定位夹板，以及使用 VE4（P=1；P=0.092）或 VE5（P=0.125；P=0.25），确定正确牙齿颜色（VITA 3D-Master 色调）均无显著差异。
使用 VE4 或 VE5 时，定位夹板对确定正确的牙齿颜色（VITA 3D-Master 色调）没有影响。在临床研究中精确测量 Lab 值时，应使用定位夹板。未经设备使用培训的人员使用 VE5 比 VE4 更频繁地确定正确的牙齿色调。©2018 Wiley Periodicals，Inc.
正确确定牙齿色调是美学重建牙科治疗的重要步骤。颜色可能是牙科美学最重要的决定因素之一。光照条件、性别、年龄、经验和色觉障碍等因素会影响色调匹配过程。这些缺陷促使人们希望使用数字设备进行客观、可重复的色调确定方法。最可靠、最常用的数字色调确定设备之一是“VITA Easyshade”（VITA Zahnfabrik，巴德沙伊德，德国）。目前，尚无（已发表）关于新型 VE 5 测量精度的报告。此外，目前还没有比较 VE 4 和 VE 5 的研究。
