Department of Prosthodontics, Hospital for Dental, Oral and Orthodontic Medicine (Carolinum), Johann Wolfgang Goethe-University Frankfurt am Main, Frankfurt, Germany.
Poliklinik für Zahnärztliche Prothetik, ZZMK Carolinum, Johann Wolfgang Goethe - Universität Frankfurt am Main, Theodor-Stern-Kai 7, Haus 29, 60596, Frankfurt am Main, Germany.
Clin Oral Investig. 2017 Dec;21(9):2863-2871. doi: 10.1007/s00784-017-2088-0. Epub 2017 Mar 6.
Tooth colour determination is an essential component in the preservative and prosthetic workflow during production of tooth-coloured restorations. The aim of the study was to compare the clinical suitability of conventional, visual tooth colour determination and digital methods.
Tooth colour of vital, natural central incisors among a total of 107 subjects was determined visually by a dentist (VD) and dental technician (VDT) using VITA Toothguide 3D-MASTER®, digitally by the spectrophotometer VITA Easyshade Advance 4.0 (reference instrument) and Trios®Color intra-oral scanner (test subject). Reliability was examined by repeating the digital measurements of 20 teeth three times. The analysis was based on the recorded 3D-MASTER values and Lab/LCh parameters.
The measuring accuracy was 43.9% with the Trios®Color scanner, 35.5% for VD and 34.6% for VDT. In 25.5% of cases, the scanner's results corresponded with VD and in 33.6% with VDT. The visual methods corresponded with 45.8%. All mean values of the recorded colour differences fell within the clinically acceptable range of ΔE ≤ 6.8. The intra-oral scanner attained repeatability of 78.3% and the VITA Easyshade system of 76.6%.
The Trios®Color intra-oral scanner appears to be a good alternative to the current standard of visual tooth colour determination. The new module attains better results than the visual method and is comparable to the reference instrument.
Dentistry becomes increasingly digitalized and tooth colour determination devices have generally to be improved. Therefore, the investigation of a new digital device is important for future developments.
牙齿颜色的确定是制作牙色修复体时保存和修复工作流程中的一个重要组成部分。本研究的目的是比较传统的、视觉的牙齿颜色确定方法和数字方法的临床适用性。
通过牙医（VD）和牙科技师（VDT）使用 VITA Toothguide 3D-MASTER®，以及分光光度计 VITA Easyshade Advance 4.0（参考仪器）和 Trios®Color 口内扫描仪（测试对象），对总共 107 名受试者的活髓、天然中切牙的牙齿颜色进行了视觉确定。通过重复 20 颗牙齿的三次数字测量来检查可靠性。分析基于记录的 3D-MASTER 值和 Lab/LCh 参数。
Trios®Color 扫描仪的测量精度为 43.9%，VD 为 35.5%，VDT 为 34.6%。在 25.5%的情况下，扫描仪的结果与 VD 相符，在 33.6%的情况下与 VDT 相符。视觉方法的对应率为 45.8%。记录的颜色差异的所有平均值均落在临床可接受的范围 ΔE ≤ 6.8 内。口内扫描仪的重复性为 78.3%，VITA Easyshade 系统的重复性为 76.6%。
Trios®Color 口内扫描仪似乎是当前视觉牙齿颜色确定标准的一个很好的替代方法。新模块的结果优于视觉方法，并且与参考仪器相当。
牙科越来越数字化，牙齿颜色确定设备通常需要改进。因此，对新的数字设备的研究对于未来的发展很重要。
