THE SHEAR BOND STRENGTH OF SELF- ADHESIVE RESIN CEMENTS TO DENTAL CERAMICS

Self- adhesive cements are the lmost recent class of cements based on resin composites designed to secure the prosthetic restorations to dental tissues. Comparatively to classic cements based on resins, they are more attractive to dentists because there is no requirement for a preconditioning of the substrates. Nevertheless, their adhesive performance has been less evaluated. The purpose of this study is to evaluate and compare the shear bond strength of the three resin self-adhesive cements: MaxcemElite (Kerr)- ME, Biscem (Bisco)-BC, Rely XU100 (3MEspe)- RU and a classic version of resin cement - Variolink II ( Ivoclar)- VL to ceramic substrates: glass matrix and zirconia. The results evaluated by one-way ANOVA test indicated no statistically significant differences among the four cements in terms of adhesion to glass ceramics - the means of the values were: 14.33 MPa (SD +/- 4.16)- ME, 17.55 MPa (SD +/- 6.45)- BC, 21.45 MPa (SD +/- 5.46)- RU and 21.40 MPa (SD +/- 4.38)- VL. There are differences among the means of the values of the four groups analyzed (probability p <0.0001), the adhesion to zirconia: 4.9 MPa (SD +/- 0.61)- ME, 10.84 MPa (SD +/- 0.25)- BC, 8.2 MPa (SD +/- 0.24)- RU and 15.65 MPa (SD +/- 1.07)- VL.