Shear Bond Strength of Resin Cement with Color Indicator vs Conventional Resin Cement (In-vitro study)

Abstract

Aim: This in vitro study was conducted to compare shear bond strength (SBS) of resin cement with color indicator vs conventional resin cement. Methods: 40 zirconia blocks were prepared, 40 bovine incisor teeth were gathered, roots were separated from crowns, each crown was mounted on self-cure acrylic resin, enamel was entirely removed from crowns to expose dentin, zirconia blocks were luted
to the exposed dentin surfaces, divided into two groups based on the cement that was used (n=20): Group I – was luted with Conventional resin cement(Maxcem EliteTM) and Group II – was luted with Resin cement with color indicator (Maxcem Elite ChromaTM), each group was subdivided into two subgroups according to with or without thermocycling(TCs) (n=10). SBS test was conducted by a universal testing machine with a crosshead speed of 1.0 mm/min using a mono-beveled chisel. Data was collected and IBM® SPSS® Statistics Version 20 was used for analysis. The significance level was established at P ≤ 0.05. Results: Higher mean of control group I (3.90MPa±0.45) than group II (3.07MPa±0.93) with no statistically significant difference between them (p=0.111) and higher mean of thermocycled group I (2.66 MPa ±0.79) than group II (2.57MPa ±1.05) with no statistically significant difference between them (p=0.873). Conclusions: There was no difference in shear bond strength between Maxcem EliteTMand Maxcem Elite ChromaTMand thermocycling decreased shear bond strength.