title: Effect of experimental acid/base conditioner on microtensile bond strength of 4-META/MMA-TBB resin to dentin after long-term water immersion.
abstract: An experimental conditioner (Exp), which was an aqueous solution of 10% ascorbic acid and 5% ferric chloride, was prepared in this study. This study evaluated the effect of Exp on the microtensile bond strength between a self-curing resin and dentin after long-term water immersion. Flat human dentin surfaces were sequentially pretreated with 40% phosphoric acid, 10% sodium hypochlorite, and Exp. Surface pretreatment with an aqueous solution of 10% citric and 3% ferric chloride (10-3) was used as a control. Composite resin rods were bonded to pretreated dentin surfaces using 4-META/MMA-TBB resin. Microtensile bond strengths were evaluated after water immersion at 24 h, 12 months, 24 months, and 36 months. At each immersion period, the bond strength of Exp was significantly higher than that of 10-3. After 36 months, Exp showed no significant decrease in microtensile bond strength, but 10-3 showed significant reductions. Pretreatment with experimental acid/base conditioner markedly improved the bonding durability of 4-META/MMA-TBB resin to human dentin when compared against the conventional 10-3 treatment.
authors.affiliation: Department of Translational Medicine, Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki, Japan. soeno@nagasaki-u.ac.jp
authors.forename: Kohyoh
authors.initials: K
authors.lastname: Soeno
authors.forename: Yohsuke
authors.initials: Y
authors.lastname: Taira
authors.forename: Shuichi
authors.initials: S
authors.lastname: Ito
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D001205:Ascorbic Acid / Q000737:chemistry*; D001896:Boron Compounds / Q000737:chemistry*; D002712:Chlorides / Q000737:chemistry*; D019343:Citric Acid / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry; D003804:Dentin / Q000648:ultrastructure*; D005290:Ferric Compounds / Q000737:chemistry*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007101:Immersion; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry*; D008768:Methylmethacrylates / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D010756:Phosphoric Acids / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry*; D012973:Sodium Hypochlorite / Q000737:chemistry; D013314:Stress, Mechanical; D013718:Tensile Strength; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D001896:Boron Compounds; D002712:Chlorides; D003188:Composite Resins; D003764:Dental Materials; D005290:Ferric Compounds; D008689:Methacrylates; D008768:Methylmethacrylates; D010756:Phosphoric Acids; D019279:Resin Cements; D014867:Water; D019343:Citric Acid; C049495:Super-bond; D012973:Sodium Hypochlorite; C030242:phosphoric acid; D001205:Ascorbic Acid; C024555:ferric chloride