抄録
The purpose of this study was to investigate the efficacy of an experimental dentin primer consisting of ascorbic acid (AA) and ferric chloride (Fe). Three exprimental primers—10wt%AA and 0.075wt%Fe (i. e., 10AA-0.075Fe), 10AA-0Fe, and 0AA-0.075Fe—were prepared. Flattened dentin surfaces were first treated with phosphoric acid and NaClO, and subsequently primed using each experimental solution. Besides the experimental solutions, 10wt% citric acid and 3wt% ferric chroride (10CA-3Fe) was also used. A stainless steel rod was bonded to the dentin surface with Super-Bond C & B. 10CA-3Fe/Super-Bond C & B was then used as a control. Tensile bond strengths were evaluated after 24-hour immersion in water. 10AA-0.075Fe showed significantly high bond strength compared to 10AA-0Fe, 0AA-0.075Fe, 0AA-0Fe, and 10CA-3Fe. No significant differences were found between 10AA-0.075Fe and Super-Bond C & B system. The experimental primer consisting of 10wt% ascorbic acid and 0.075wt% ferric chloride improved the bonding between Super-Bond C & B and dentin conditioned with phosphoric acid and NaClO.
