Abstract
An adhesion promoting monomer of 3-methacryloyloxybenzoic acid(3-MBA)was utilized as an ingredient of experimental dental photocurable bonding resins.Effects of the monomer compositions of the resins on the bond strength to tooth substrates were examined.The bond strength of the light-cured resin was enhanced by the addition of 3-MBA.When 3-MBA was incorporated with Bis-MPEPP2.6E, TEGDMA or their binary comonomers, the bond strengths obtained were ca.130kgf/cm2 for the enamel treated with an aqueous solution 10% citric acid and 3% FeCl3 and ca.50kgf/cm2 for the dentin.SEM examination revealed that the acid resistant dentin layer was formed by the infiltration and polymerization in situ of the monomer of the 3-MBA bonding resin.However, bond strengths of less than 50kgf/cm2 obtained on treated dentin could be explained by the extent of the tag formation in dentinal tubules.
