Abstract
The adhesion between MMA/TBB-O resin to dentin treated with 1-35 (MTYA) was investigated. The dentin was etched either with 40% phosphoric acid (H3PO4), 10% citric acid or 10% citric acid-3% FeCl3 (10-3) solution. After the 1-35 (MTYA) treatment, MMA/TBB-O resin was applied to the treated surface. The tensile bond strengths were measured after 1 day in 37°C water.
They were respectively 18MPa for 60s H3PO4 etching, 23MPa for 60s citric acid etching, 20MPa for 30s 10-3 etching, and 16MPa for 60s 10-3 etching. Without the 1-35 (MTYA) treatment, the bond strengths were 0MPa for H3PO4 etching and citric acid etching, and about 5-8MPa for 10-3 etching. The thickness of the resin reinforced dentin was not proportional to the bond strengths.
