Abstract
This study examined the influence of long-term storage of bonding agents and etching agent treatment conditions in one-step bonding agent on the enamel and dentin bond strength. The bonding systems used were all the one-step type. Bovine and resin composite were used as the experimental materials. The bonding agents were stored at room temperature. The time periods examined were 1 and 180 days. Sample surfaces were pre-treated with phosphoric acid (PAT) or citric acid (CAT) and the no pre-treatment (NON) group served as a contrary. As a result, there was no significant difference in the bond strength of bonding agents stored for 1 day in the NON group or that stored for 180 days in PAT and CAT. However, those stored for 180 days in the NON group showed significantly decreased bond strength after 1day. For bonding agent stored for 180 days, the bond strengths in PAT and CAT were significantly greater than that in the NON group.
