Surface treatment with ascorbic acid and ferric chloride improves the micro-tensile bond strength of 4-META/MMA-TBB resin to dentin.

摘要

OBJECTIVE: The purpose of this study was to investigate the efficacy of an experimental dentin conditioner consisting of ascorbic acid (AA) and ferric chloride (Fe), in terms of micro-tensile bond strength (microTBS). METHODS: Five experimental solutions were prepared and evaluated: 10% AA and 5% Fe (10AA-5Fe); 10% AA and 0% Fe (10AA-0Fe); 0% AA and 5% Fe (0AA-5Fe); 10% citric acid and 3% ferric chloride (10-3); and, 0% AA and 0% Fe (0AA-0Fe). Flattened dentin surfaces were treated with each of the experimental solutions. A composite material rod was bonded to the dentin surface with a self curing luting agent (4-META/MMA-TBB resin). The specimens were stressed to failure under tension after 24h of immersion in water. RESULTS: The 10AA-5Fe group showed significantly higher bond strength than the 10AA-0Fe, 0AA-5Fe, 10-3 and AA-0Fe groups. CONCLUSION: It was found that an experimental conditioner consisting of 10% ascorbic acid and 5% ferric chloride significantly improved the micro-tensile bond strengthbetween 4-META/MMA-TBB resin and dentin.