Abstract
It has previously been reported that higher-order structure of dentin collagen is significant for adhesion between dentin and 4-META/MMA-TBB resin.The effect of FeCl3 on the adhesion to dentin by a new method was investigated in this study.It was found that dentin collagen denatured by phosphoric acid and citric acid.But the denaturation was not observed in collagen treated with an aqueous solution of 3% ferric chloride in 10% citric acid(10-3).Dentin collagen heated at 60℃ in a buffer solution for 8hr was completely denatured.The bond strength of 4-META/MMA-TBB resin to 10-3 etched dentin, which had been heated to 60℃ for 15 min in water, decreased to 7MPa.On the other hand, the strength was 18MPa on the dentin heated in FeCl3 water solution.These results indicate that ferric ion in 10-3 is effective to stabilize dentin collagen.
