Adhesive Efficiency of New Bonding Agents to Dentin on Bonding Agent Using Urethane Acrylate Oligomer

Abstract

The tensile bond strength of new bonding agents on human dentin treated with 37% phosphoric acid solution for 60 sec to a photocurable compostite resin was measured and the fractured surface was then observed by SEM.The new bonding agents consisted of various 20wt% high molecular monomers(MW.1500, 5000, urethane acrylate oligomer)as a base monomer.The best bonding agent was a mixture of 20wt% 1500 molecular monomer as a base monomer and the value of the tensile bond strength was 91±17kgf/cm².The tensile bond test and SEM image of the fracture surface suggested that a high molecular monomer as a base monomer promoted the adhesive efficiency to human dentin.