Abstract
The most common cause of adhesion failure between two materials is the difference in structure. Relining materials are commonly used to reline the tissue surface of the denture. The efficiency of these liners depends on the adhesion between the denture base and liner. This study evaluated and compared the adhesive bond strength of four relining materials to heat-cured resin. The adhesive bond strength of two soft relining materials (Molloplast -B & Silagum-Comfort) and two hard relining materials (Rebase II fast & Ufi Gel-Hard) were done and compared with heat-cured denture base acrylic resin after immersing them in artificial salivary substitute. The strength was evaluated at different intervals. Bondstrength of the liner materials in descending order, as found out in this study is: Rebase II fast, Ufi Gel-Hard, Molloplast -B, Silagum-Comfort. It was also observed from the ANOVA test that there was a statistically significant difference in the adhesive bond strength among the samples at 15 days, 30 days, and 90 days. It was found from the study that hard-liner materials had a greater adhesive bond strength in comparison to soft-liner materials.
Keywords: Denture liner, Strength, Relining materials, Adhesive bond-strength.