An in-vitro analysis of shear bond strength of resin based luting cements to lithium disilicate glass ceramic

Abstract

Lithium-disilicate glass-ceramic (LDGC) material was introduced in the year 2000; it improved the strength of single and multiple-unit restorations. The inherent brittleness and limited flexural strength of the available glass-ceramic material were the major drawbacks of these restorations. Adequate adhesion between ceramic and tooth substructure was vital for the successful functioning of ceramic restoration. Limited information is available about the currently available luting systems. Aims and objectives: The present in-vitro study was designed to compare and evaluate the shear bond strength of three different resin based luting cements to lithium disilicate glass ceramic. The study was conducted to evaluate the shear bond strength of different resin based luting cements to lithium disilicate glass ceramic. Methods and Methodology: Thirty lithium disilicate glass ceramic disks were fabricated and were surface treated. The ceramic specimen were divided into three groups that received three different luting cements (Group 1: RelyX Ultimate Clicker, Group 2: Fusion Self Lute and Group 3: ParaCore). The shear bond strength of adhesive resin cement to the ceramic substrate was then measured with a Universal testing machine (Multitest 10-I, Mecmesin). Following de-bonding, all fractured interfaces were visually analysed from the Scanning electron microscope photomicrographs to determine the mode of fracture. Results: The study results demonstrated that there was no statistical significant difference between RelyX and Fusion Self Lute while there was statistically significant difference between RelyX and ParaCore (p=0.019, p Conclusion: the study concluded that the resin cements containing filler particles show higher bond strength values when compared to resin cements with no filler particles and bonds which fail by cohesion exhibit high-strength performance. Keywords: luting, Ceramic, High- strength.