Influence of background and tooth shade on shade matching


Sezer T., Yaprak A.

FDI World Dental Congress 2024, İstanbul, Turkey, 12 - 15 September 2024, vol.74, no.206539, pp.39

  • Publication Type: Conference Paper / Summary Text
  • Volume: 74
  • Doi Number: 10.1016/j.identj.2024.07.690
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.39
  • Erciyes University Affiliated: Yes

Abstract

AIM or PURPOSE: This study aimed to analyze the effect of

background color and tooth shade on visual shade matching.

MATERIALS and METHOD: The Erciyes University Clinical

Research Ethics Committee approved the procedures of this

study (Approval number: 2023/823). Twenty prosthodontists


performed visual shade matching on four different back-

grounds (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 back-

grounds. The effects of background and tooth shade factors


on shade matching 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 (p=0.006). The correct match percentages were

found to be 79.7%, 74.7%, 69.7%, and 68.8% on gray, black,

green, and white backgrounds, respectively. Significantly


more accurate matching was achieved on the gray back-

ground compared to the green and white backgrounds. The


tooth shade also significantly affected shade matching

(p<0.001). The correct match percentages for tooth shade

were 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(S): Background color and tooth shade signifi-

cantly affected tooth shade matching.