title: The effect of hydrogel and solution of sodium ascorbate on bond strength in bleached enamel.
abstract: Compromised bonding to bleached enamel can be reversed with sodium ascorbate as an antioxidant. This study evaluated the effect of hydrogel and solution of sodium ascorbate on enamel-resin composite shear bond strength after bleaching. Sixty buccal enamel surfaces obtained from human, sound third molars were randomly divided into 4 groups (n=15). Enamel surfaces were subjected to different treatments: 1) bleaching (10% carbamide peroxide gel); 2) bleaching + 10% sodium ascorbate solution; 3) bleaching + 10% sodium ascorbate hydrogel and 4) bleaching + 20% sodium ascorbate hydrogel. The specimens were bonded with Single Bond and restored with a composite. The specimens were prepared for shear bond testing. The data was evaluated using ANOVA and Tukey tests. Bond strengths were significantly increased following hydrogel and solution of sodium ascorbate treatments (p<0.05). Also, there was no significant difference among the different forms of sodium ascorbate preparations.
authors.affiliation: Deptartment of Operative Dentistry, Dental School, Tabriz University of Medical Sciences, Iran. kimyais@tbzmed.ac.ir
authors.forename: Soodabeh
authors.initials: S
authors.lastname: Kimyai
authors.forename: Hadi
authors.initials: H
authors.lastname: Valizadeh
mesh_terms: D000179:Acrylates / Q000737:chemistry*; D000975:Antioxidants / Q000737:chemistry*; D001205:Ascorbic Acid / Q000737:chemistry*; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D000077463:Carbamide Peroxide; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003743:Dental Enamel / Q000648:ultrastructure*; D003793:Dental Restoration, Permanent; D017220:Dentin-Bonding Agents / Q000737:chemistry; D004338:Drug Combinations; D006801:Humans; D008422:Materials Testing; D008964:Molar, Third; D016877:Oxidants / Q000737:chemistry; D010545:Peroxides / Q000737:chemistry; D033081:Shear Strength; D012822:Silicon Dioxide / Q000737:chemistry; D012996:Solutions; D013314:Stress, Mechanical; D014073:Tooth Bleaching; D014508:Urea / Q000031:analogs & derivatives / Q000737:chemistry; D015040:Zirconium / Q000737:chemistry
chemical_list: D000179:Acrylates; D000975:Antioxidants; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D004338:Drug Combinations; D016877:Oxidants; D010545:Peroxides; D012996:Solutions; C083568:Z100 composite resin; C115612:single bond; D000077463:Carbamide Peroxide; D017438:Bisphenol A-Glycidyl Methacrylate; D012822:Silicon Dioxide; D014508:Urea; D015040:Zirconium; C453622:carbopol 934P; D001205:Ascorbic Acid