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


CONCLUSIONS
It was found that an experimental conditioner consisting of 10% ascorbic acid and 5% ferric chloride significantly improved the micro-tensile bond strength between 4-META/MMA-TBB resin and dentin.
Soeno
Kohyoh
K
Nagasaki University, Graduate School of Biomedical Sciences, Department of Translational Medicine Graduate School of Biomedical Sciences, Division of Applied Prosthodontics, 1-7-1 Sakamoto, Nagasaki City 852-8588, Japan. soeno@nagasaki-u.ac.jp
Taira
Yohsuke
Y
Jimbo
Ryo
R
Sawase
Takashi
T
D000134:Acid Etching, Dental / Q000379:methods*; D000704:Analysis of Variance; D001205:Ascorbic Acid / Q000737:chemistry; D001896:Boron Compounds / Q000737:chemistry; D002712:Chlorides; D001840:Dental Bonding; D003799:Dental Stress Analysis; D003804:Dentin / Q000187:drug effects / Q000648:ultrastructure; D003806:Dentin Permeability / Q000187:drug effects*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D004338:Drug Combinations; D005290:Ferric Compounds / Q000737:chemistry; D006801:Humans; D008689:Methacrylates / Q000737:chemistry; D008768:Methylmethacrylates / Q000737:chemistry; D008964:Molar, Third; D019279:Resin Cements / Q000737:chemistry*; D013499:Surface Properties; D013718:Tensile Strength / Q000187:drug effects*
D001896:Boron Compounds; D002712:Chlorides; D017220:Dentin-Bonding Agents; D004338:Drug Combinations; D005290:Ferric Compounds; D008689:Methacrylates; D008768:Methylmethacrylates; D019279:Resin Cements; C476987:methylmethacrylate-tributylborane resin; C034139:4-methacryloxyethyltrimellitic acid anhydride; D001205:Ascorbic Acid; C024555:ferric chloride