Effects of Simulated Gastric Acid Exposure on Optical Properties of CAD/CAM Ceramic Blocks
Asst. Prof. Isil Kecik Buyukhatipoglu, Derya Doğan Evlice, Assoc. Prof. Fatih Sarı, Prof. Asli Secilmis
Gaziantep University
Objectives
To investigate the effect of glaze and polishing procedures on the color stability (ΔE00) of Cerec Tessera, IPS e max and Vita Suprinity CAD/CAM blocks aging with simulated gastric acidic solution.
Materials and Methods
This study consisted of 3 main groups. Twenty specimens were fabricated from each group as Cerec Tessera, IPS e max CAD,Vita Suprinity. After mechanical polishing or glaze finishing, the specimens were randomly divided into twosubgroups (n=10). Half of speciemens were polished and half of speciemens were glazed for each group according to the manufacturer’s instructions. After gastric acid solution application, ΔE00 of materials was calculated. L*, a*, b* values were recorded using a calibrated digital spectrophotometer (Vita Easyshade Advance 4.0). The data were evaluated by using Kruskal Wallis Test and Post Hoc Test at the significance level of 0.05.
Results
The effects of the glazing/polishing protocols and type of CAD/CAM blocks for aging process were significant for the L*, a*, b*, ΔE00, TP00 parameters (P<.005). ΔE00 values of tested ceramic materials were different (P<.005).
Conclusions
Gastric acid solution treatment produced significant changes in colour with the variables of all ceramic types with mechanical polishing/glaze finishing.