Effect of Simulated Gastric Acid on Surface Roughness of Different Types of Dental Ceramics

Purpose: The purpose of this in vitro study was to evaluate the effect simulated gastric acidity on surface roughness different types dental ceramics. Methods: Fifty specimens were divided according type material into five groups (n=10), as follows: Partially stabilized zirconia (PSZ) (Prettaue),Fully (FSZ) (Prettaue Anterior), lithium disilicate ceramics (IPS. Emax), Zirconia-containing silicate (ZLS) (Vita Suprinity) and Hybrid Enamic). Specimens cut using a low-speed diamond saw (Isomet) rectangular shape with following dimension: 12mm width x 14mm length 1 mm thickness. Surface evaluated by optical profilometer. Each specimen immersed 5 ml acid ph 1.2 for 96 h a37◦C incubator. all tested revaluated. One-way ANOVA used compare mean difference between groups. Paired t-test comparing (before after) each group. Results: There significant (P=0.002) increase materials tested, but it non-significant (P>0.05) Prettaue (P=0.607), Anterior (P=0.273) Vita Suprinty group (P=0.201). (P≤0. 05) IPS. Emax (P=0.007) Enamic (P=0.021). showed least amount change (0.0006±0.002), while highest (0.0100±0.011). Conclusions: significantly increased hybrid