Analysis of Shade Matching in Natural Dentitions Using Intraoral Digital Spectrophotometer in LED and Filtered LED Light Sources

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Abstract
Purpose: To evaluate the shade matching capabilities in natural dentitions using Vita Toothguide 3D‐Master and an intraoral digital spectrophotometer (Vita Easyshade Advance 4.0) in various light sources.Materials and Methods: Participants between 20 and 40 years old with natural, unrestored right maxillary central incisors, no history of bleaching, orthodontic treatment, or malocclusion and no rotations were included. According to their shades, subjects were randomly selected and grouped into A1, A2, and A3. A total of 100 participants (50 male and 50 female) in each group were chosen for this study. Shade selection was made between 10 am and 2 pm for all light sources. The same examiner selected the shade of natural teeth with Vita Toothguide 3D‐Master under natural light within 2 minutes. Once the Vita Toothguide 3D‐Masterwas matched with the maxillary right central incisor, the L*, a*, and b* values, chroma, and hue were recorded with Vita Easyshade Advance 4.0 by placing it on the shade tab under the same light source. The values were statistically analyzed using one‐way ANOVA and Tukey's HSD post hoc test with SPSS v22.0 software.Results: The mean ∆E*ab values for shades A1, A2, and A3 for groups 1, 2, and 3 were statistically significantly different from each other (p < 0.001).Conclusion: The intraoral digital spectrophotometer showed statistically significant differences in shade matching compared to Vita Toothguide 3D‐Master. Incandescent light showed more accurate shade matching than the filtered LED, LED, and daylight.

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