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

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