‘Comparative evaluation of shear bond strength of porcelain luted to enamel & dentin with two different resin cements- An in vitro study

Abstract

Statement of problem: Self Adhesive Cement belongs to the newly introduced category that com bines use of adhesive and cement in one single application ellininating the need or pretreatment ot tooth surface. However, there is very little published data on its bond strength with tooth and ceramic. This study was thus aimed to evaluate and compare shear bond strength of porcelain luted to enamel & dentin with self-adhesive and conventional Bis- GMA resin cement. Methods and Material: Forty all ceramic dises were prepared using leucite reinforced pressable ceramic. Forty human, non carious freshly extracted permanent premolars were mounted and vertical planar dentin and enamel bonding surfaces were pre paied. Ceinentation was done under a dynamic load of 155gms. Samples were thermocyclcd & then subjected to shear load. Results: The mean shear bond strength of porcelain luted to enamel and dentin with control Cement was [26.92 ± 0.36 MPa] , [17.94 ± 0.50 MPa] and experimental Cement was [26.75 ± 0.31 MPa], [17.73 ± 0.41 MPa] respectively. The difference was statistically insignificant (p > 0.05). Failures in enamelbonded specimens were seen as fracture near enamel resin interface but within the resin or adhesive failure between cement & ceramic inteiface. However most of the failures for dentin-bonded specimens were adhesive between tooth resin interfaces. Conclusion: The performance of self-etching self-universal dual cure resin Cement on the basis of shear bond strength test is comparable to that of conventional Bis GMA dual cure resin Cement.