Evaluation of color change and surface roughness for two indirect esthetic materials submitted to different immersion protocol.

Abstract

Aim: This study aimed to evaluate the color stability and surface roughness of hybrid ceramic and resin composite blocks materials after different immersion protocol.Methods: Forty samples were prepared and divided into 2 groups according to the type of material. Group A hybrid ceramic (Cerasmart) and Group B composite resin blocks (Brilliant Crios). Samples of each group were subdivided into 4subgroups (n=5) according to immersion protocol. subgroup I artificial saliva, subgroup II artificial saliva and citric acid, subgroup III artificial saliva followed by citric acid and tea without sugar and subgroup Ⅳ artificial saliva followed by citric acid and tea with sugar. All subgroups were submitted to the immersion protocol for 28 days. Then samples were tested for color stability and surface roughness measurements before and after immersion by spectrophotometer and stylus profilometer respectively.Results: For color stability and surface roughness, all subgroups for both groups showed statistically significant mean values comparing before. And after immersion the ∆E and Ra values for group B in all subgroups were significantly higher than group A. The ΔE and Ra values of subgroup III in both groups had the highest mean values. On the other hand, subgroup I had the lowest mean values. Conclusion: Immersion protocol associated with tea without sugar showed higher stainability and affect surface roughness more than tea with sugar. Moreover, both materials exceed the clinical acceptance level (∆E=3.7) of color change.