Effects of the Finishing Protocols and Oral Hygiene Procedures in the Microhardness and Surface Roughness of CAD/CAM Ceramics

The objective of this in vitro study was to evaluate the effects finishing protocols and oral hygiene procedures on surface mechanical properties CAD/CAM ceramics. Specimens (n = 96, (15x10x2mm) leucite glass-ceramic (LGC) feldspathic ceramic (FP) received polishing or glazing. Surface roughness (Ra) microhardness (VHN) were obtained with a profilometer hardness tester, respectively, before after each procedure (TB: toothbrushing; PB: prophylaxis paste rubber cup; BJ: bicarbonate jet). ANOVA, paired t Tukey’s tests applied (a=0.05). For both materials, only BJ affected Ra's values when performed. Moreover, no significant variations VHN observed for LGC glazed TB. Significant Ra changes materials BJ. Besides, exhibited similar TB VHN, regardless material protocol used. Changes varied method. In general, jet most harmful method type did not have protective effect against produced by methods.