Comparative Study on Tensile bond Strength between Heat curing Denture base Resin and Reline Materials

Abstract

Background/Objectives: The purpose of this study was to evaluate the effect of the chemical surface treatment on the tensile bond strength of heat curing denture base resin and reliners. Methods/Statistical Analysis: The resin used for producing the sample was heat curing resin, while for the liner, two types of self-curing resins, two types of hard liners and two types of soft liners were used. Denture base resin surface was treated with MMA 95% and TEGDMA 5%, MMA 95% and silane coupling agent 5%, heat curing resin monomer. After denture reliners were injected, tensile bond strength was measured. Findings: When analyzed by manufacturer, for repair resin, Lang had a higher tensile bond strength than Vertex SC in all experiment groups (p<0.05). For hard liner, Kooliner was higher than Rebase in all experiment groups (p<0.05). For soft liners, Dura base had a higher tensile bond strength than Coe-soft in all experiment groups (p<0.05). As such, it is assumed that the chemical treatment of surfaces between the denture base resin and each of the liners affects the tensile bond strength, and that MPS intermediates the adhesion between the organic and inorganic matter to increase the bonding. Therefore, chemical treatment of the surface using TEGDMA and MPS, as well as heat curing resin monomer is effective in improving the tensile bond strength. Among them, chemical surface treatment using MPS and heat curing resin monomer appeared to be the most effective. Improvements/Applications: After, in order to increase the bond strength between heat curing denture base resin and reliners, to have more kinds of silane coupling agent and liner for studies of chemical bonding is considered it should be continued.