Effect of Corrosion On Some Properties of Dental Ceramics

Abstract

Objective: The purpose of this study was to investigate Effect Of Corrosion On Some Properties Of Dental Ceramics. Materials and Method: Twenty four samples were constructed and divided into 3 groups according to ceramic materials used (8 samples for each) group 1(E max), group 2(High Translucent Zirconia (DD BioZx2)) and group 3 (Opaque Zirconia. (DD BioZ)). Then each group was subdivided into three subgroups (3 samples each) according to sequence of tests performed. Then 4 samples from each subgroup were subjected to acetic acid as a corrosive agent. Those samples were first weighted, after that subjected to corrosion test, then weighted again to determine weight loss of each sample. Then samples were tested for color stability using the VITA Easy shade before and after corrosion. shade guides for samples were used (A3). Disinfection methods included immersion for 10 minutes in 1 of the tested disinfectant solutions (5.25% sodium hypochlorite, 2% alkaline gluteraldehyde or 1.7% trialkyl ammonium propionate). The specimens were cleaned after disinfection; the cleaning methods included ultrasonic cleaning in distilled water for 5 minutes and for 10 minutes, steam cleaning for 30 seconds, and under tap water for 30 seconds (n=5). The L*a*b value were recorded and ΔE were calculated. Two-way Repeated Measure ANOVA was used to compare the mean differences over time. Result: All the samples used showed a perceivable change in color (∆E>1). Conclusion: All ceramic samples after corrosion show significant change in color (P