Influence of background color and target tooth shade on shade-matching accuracy

Authors : Taygun Sezer, Aygül Yaprak

Pages : 25-31

Doi:10.54617/adoklinikbilimler.1520506

View : 38 | Download : 37

Publication Date : 2025-01-27

Article Type : Research Paper

Abstract :Aim: This study analysed the effect of background color and target tooth shade on visual shade-matching. Materials and Method: Twenty prosthodontists performed visual shade-matching on four different backgrounds (green, grey, white, black) using the Vita Classical shade guide. Two identical shade guides were used for shade-matching. One of them was blinded so that the color codes on it could not be identified. Each observer matched all 16 shade tabs using the second shade guide on four different backgrounds. The effects of background and target tooth shade factors on shade-matching accuracy were analyzed with the Chi-square test. A two-proportion z-test with Bonferroni correction was applied to pairwise comparisons. P<0.05 was considered statistically significant. Results: The background significantly affected shade-matching accuracy (p=0.006). The correct match percentages were 79.7%, 74.7%, 69.7%, and 68.8% on gray, black, green, and white backgrounds, respectively. More accurate matching was achieved on the gray background compared to the green and white backgrounds. The target tooth shade significantly affected shade-matching accuracy (p<0.001). The correct matching rates by target shade tab were obtained as follows: A1(75%), A2(55%), A3(63.8%), A3.5(81.3%), A4(81.3%), B1(96, 3), B2(75%), B3(78.8%), B4(71.3%), C1(63.8%), C2(70%), C3(58.8%), C4(% 86.3), D2(96.3%), D3(45%), D4(73.8%). Conclusion: Background color and target tooth shade significantly affected visual shade-matching accuracy.
Keywords : Renk seçimi, arka plan, diş rengi, renk tespiti