RETROSPECTIVE EVALUATION OF DIFFERENT SHADE SELECTION METHODS IN THE CONTEXT OF THE VITAL BLEACHING TECHNIQUE

EZGİ TÜTER BAYRAKTAR, HALE CİMİLLİ, NEVİN KARTAL, CAFER TÜRKMEN

Clinical and Experimental Health Sciences - 2021;11(2):354-357

Objective: This retrospective study was performed to evaluate the correspondence between digital image analysis and spectrophotometry tooth shade results. Methods: The study population consisted of 10 patients. Office bleaching was performed using an in office whitening. Tooth shade was analysed by spectrophotometry and image analysis of digital photographs at baseline, and at 1 week and 3 month follow up visits. The correspondence between the two methods was evaluated based on the total color change (ΔE), calculated using lightness, chroma, and hue (LCH) values for spectrophotometry and lightness, red green, blue yellow (LAB) values for digital image analysis. The Mann–Whitney U, Wilcoxon signed rank and Kruskal–Wallis tests were used for the statistical analyses (p<0.05). The correspondence between digital image analysis and spectrophotometry results was determined using the intraclass correlation coefficient (ICC). Results: At the 3 month follow up, there were no significant differences in tooth shade results between the spectrophotometry and digital image analysis methods (p=0.855), which showed strong agreement (ICC=0.983). Conclusion: Digital image analysis may be a useful alternative to spectrophotometry for tooth shade selection.