They were respectively 18MPa for 60s H3PO4 etching, 23MPa for 60s citric acid etching, 20MPa for 30s10-3 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.
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