Research Information System University of Greifswald

Klinke T*¹, Hannak W, Boening K, Jakstat H, Prause E

1 - Zentrum für Zahn-, Mund- und Kieferheilkunde / Poliklinik für Zahnärztliche Prothetik, Alterszahnheilkunde und Medizinische Werkstoffkunde

Background: Visual color determination (VCD) requires color competence and training. The aim of this study was to evaluate the VCD deviations of students. The research’s hypothesis was that none of the color references would show a better result. Methods: Participants evaluated 9 selected templates using two reference scales (VITA-classical(VC) vs. 3D-Master-Toothguide(3DM_TG)). Templates’ color distance to the chosen color (ΔEab) was calculated in the CIELAB 2000. The sum’s changes of the parameters (LCh°) represented the target variable. Results were evaluated with non-parametric, rank-scaled methods, utilizing the median with 25%-;75%-quartile. The significance level (α=0.05) using the Student t-test. Results: The mean±95%CI(SD) was -1.27±-1.09(3.18), and median ΔE00 was -1.49(-1.97;0.96) for dC3DM_TG. The determination with VC showed noticeable differences (dCVC), with a mean ΔE00 of 0.00±0.00(2.20) and a median ΔE00 of 0.00 (1.17;1.71). The standard error (SE) was 0.19 for the dCVC and 0.27 in the dC3DM_TG. dC3DM_TG vs. dCVC showed significant differences at P<0.001. Conclusions: The VCD made by dental students resulted in color deviations, regardless of the reference template used. The color deviations in hue and chroma were comparable, regardless of the reference scale. VCD’s Implementation in dental education is useful to avoid misjudgments of the shade and potential remakes of dentures.