Evaluation of Three Different Digital Scanning Cameras with One Milling CAD/CAM Unit

Introduction: There is an increasing number of optical intraoral scanners (IOSs) that are based on different scanning technologies; the choice of which may affect clinical use. Aim: To investigate the marginal integrity and internal fit of CAD/CAM ceramic crowns constructed using three different (IOSs)with one milling CAM unit. Material & methods: 18 white epoxy resin dies were duplicated from a prepared maxillary first premolar tooth and divided into groups A, B, and C (n=6). Group A dies were scanned with Sirona Omnicam (IOS). Group B dies were scanned with Trios 3Shape (IOS), and group C dies were scanned with Emerald PlanScan (IOS). All dies received standardized Emax CAD crowns milled by Inlab MC X5 milling machine and were fired for crystallization and glazing in Programat p 310 ceramic furnaces. Vertical marginal gaps were measured. All crowns were cemented using Theracem resin cement. Internal fit was measured by sectioning half of the cemented crowns in a bucco-lingual direction and the other half in a mesio-distal direction. Data analysis was performed using 2way-ANOVA and paired t-test at 0.05 using IBM SPSS version 29.0. Results: There was a statistically significant difference in mean vertical marginal gap among the three groups (p < /span>≤0.05). The highest values were reported by Group < /p> C followed by group B. The lowest values were reported by group A. The mean internal gap of group C was significantly lower than other groups, while there was no statistically significant difference between mean internal gap of group B & group A. Conclusion: All tested (IOSs) proved to produce clinically acceptable ceramic restorations in terms of marginal and internal adaptation. Difference of scanning technologies of IOSs was found to affect significantly marginal and internal adaptation of the CAD/CAM ceramic crowns.