Effect of pre-treatment on the durability of dentin bonding systems

Abstract

We conducted a laboratory study on the effect of various dentin conditioners and on the long-term durability of dentin bonding systems. We used the OCPC method to investigate demineralization of bovine dentin by 6 dentin conditioners (10%, 40% and 65% H_3PO_4, 10% citric acid, Imperva Primer^【○!R】 and XR-Primer^【○!R】. We also measured tensile bond strength of resin composite using 5 commercial bonding systems (Superbond D Liner^【○!R】, Clearfil Linerbond^【○!R】, Imperva Bond^【○!R】, XR-Bond^【○!R】 and Tokuso Light Bond^【○!R】). We found that demineralization of dentin with dentin conditioners is necessary for good bonding, although excessive demineralization leads to degradation of long-term bonding durability.