Abstract
An aqueous solution, containing aminoacid derivatives and 2-hydroxyethyl methacrylate(HEMA), has been used as a surfactant to reinforcing the bonding strength between commercial bonding agent and tooth substance, and its bonding mechanism has been determined.In the present investigation, such a high tensile bond strength as 170 or 136kgf/cm2 to bovine dentin or enamel was obtained with an experimental bonding agent, containing an aminoacid derivative, N, O-dimethacryloyl tyrosine(DMTY).The findings revealed the excellent property of the surfactant, N-methacryloyl α-alanine(an aminoacid derivative:MAL)-HEMA solution, the affinity to tooth substance of the agent containing DMTY and the favorable strength of the layer of bonding agent.Quantitative analysis of the amount of Ca and P, dissolved from bovine dentin, revealed that aminoacid derivatives hardly dissolve hydroxyapatite in comparison with other traditional etching agents.
