Effect of Acidic pH on Surface Roughness of Current Esthetic Dental Materials
Objectives: The aim of this study is to compare the surface roughness changes (Ra) of different CAD/CAM materials after exposure to hydrochloric acid (HCl) using a 3-D optical interferometer. Methods: Five material groups were selected; IPS Empress CAD (Empress), BruxZir Solid Zirconia (Bruxzir), VITA Enamic (Enamic), IPS e.max CAD (e.max) and VITABLOCS Mark II CAD (Vitablocs). Specimens (N=18) were sectioned (2mm thick), immersed (5% HCl), stored (37 °C/45h,91h), Ra measured (baseline,45h,91h), and statistically analyzed (Friedman, Wilcoxon signed-rank). Results: There were no statistically significant differences in Ra (baseline,45h,91h) for Bruxzir and e.max, However, Empress, Enamic and Vitablocs demonstrated statistically significant differences. Conclusions: Empress, Enamic and Vitablocs showed significant increases in Ra, while Bruxzir and e.max exhibited the least change in Ra after exposure to HCl for 45h and 91h.