Influence of background/surrounding area on accuracy of visual color matching
Diana Dudea, Cristina Gasparik, Alexandra Botos, Florin Alb, Ada Irimie & Rade D. Paravina Clinical Oral Investigations ISSN 1432-6981 Clin Oral Invest DOI 10.1007/s00784-015-1620-3
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Author's personal copy Clin Oral Invest DOI 10.1007/s00784-015-1620-3
ORIGINAL ARTICLE
Influence of background/surrounding area on accuracy of visual color matching Diana Dudea 1 & Cristina Gasparik 1 & Alexandra Botos 1 & Florin Alb 1 & Ada Irimie 1 & Rade D. Paravina 2
Received: 13 November 2014 / Accepted: 28 September 2015 # Springer-Verlag Berlin Heidelberg 2015
Abstract Introduction Visual shade selection is subjective and influenced by factors that might be operator-dependent or not. The objective was to evaluate influence of observer nonrelated factors (background/surrounding area, and light) and observer-related factors (gender and color competence) on shade-matching quality and to identify the most often mismatched shades in correlation with the background. Methods Ten observers with average or superior color discrimination competence according to ISO TR 28642:2011 were asked to match 48 shade tabs of three VITA Classical shade guides, in a viewing booth under two light sources: D65 and D50. Gray, white, black, red, and light blue background/ surrounding area simulated various clinical situations. The results were statistically analyzed using Kruskal-Wallis test and Mann-Whitney U test. Post hoc power analyses and sample size calculations were also conducted. Results The matching scores ranged between 72.7 % (using blue background) and 85.9 % (using white and black backgrounds). There was a statistically significant difference between matching scores on the five backgrounds (χ2(4)=12.67, p= 0.01). When neutral gray was used as reference, MannWhitney U value was statistically significant only for the blue Clinical relevance To provide indications regarding the most recommended colors of the background and surrounding area during dental shade matching * Diana Dudea
[email protected] 1
University Medicine and Pharmacy Iuliu Hatieganu, Cluj-Napoca, Romania
2
Houston Center for Biomaterials and Biomimetics, University of Texas School of Dentistry at Houston, Houston, USA
background (U=107.00, Z=−2.52, p=0.01). The influence of gender and lighting condition was also assessed, no statistically significance being found, but in both cases, the effect size and the achieved power were small. However, color discrimination competence did influence the results (p
