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Aim: There is limited and inconsistent information on some factors affecting visual shade selection. The aim of this study was to evaluate the influence of shade guide type and professional experience on shade-matching results. Materials and methods: Thirty Dental students (DS), 30 General dentists (GDs) and 30 Dental specialists (S) participated in this study. The participants were asked to match six target tabs using two dental shade guides: Vitapan Classical (VC) and Vitapan 3D-Master (3D). An intraoral spectrophotometer was used for color measurement of target tabs and selected tabs. The color difference (∆ E) values between the target tab and selected tab were calculated. Data were analyzed using analysis of variance (ANOVA) and paired t-test (α= 0.05). Results of the first five best matches for each target tab were expressed as∆ E1 to∆ E5. Differences in the mean values of∆ E1 to∆ E5 between VC and 3D were compared using descriptive statistics.

Results: There were no significant differences among the three participating groups in∆ E values when the 3D was used (p= 0.389). However, significant differences were found with VC (p< 0.001). The∆ E values achieved from the 3D were significantly lower than those from VC for DS and S (p= 0.001 and p< 0.001, respectively). For each of the first five best matches, the mean∆ E values from the 3D were smaller than the corresponding values of VC.

Conclusion: The type of dental shade guide affected the shadematching results. The level of experience was not found to be