Effects of sodium hypochlorite and RC-prep on bond strengths of resin cement to endodontic surfaces.
There is concern that the use of sodium hypochlorite (NaOCl) and RC-Prep may lower the bond strength of resin cements. The objective of this study was to evaluate the effect of 5% NaOCl and RC-Prep treatment on the bond strength of a resin cement, C&B Metabond. Control roots (group 1) were biomechanically prepared using 0.9% NaCl as an irrigant; group 2, roots with 5% NaOCl; group 3, roots with RC-Prep; group 4, roots with 0.9% NaCl followed by 10% ascorbic acid; group 5, roots with 5% NaOCl followed by 10% ascorbic acid (pH 4); group 6, roots with 5% NaOCl followed by 10% neutral sodium ascorbate; and group 7, roots with RC-Prep followed by 10% ascorbic acid. All roots were then filled with C&B Metabond, incubated in water for 24 h, and then cross-sectioned into six 1-mm thick slabs representing cervical and middle root dentin. The slabs were trimmed and tested for tensile bond strength. The results demonstrated that both 5% NaOCl and RC-Prep produced significantly (p < 0.05) large reductions in resin-dentin bond strengths, and the reductions could be completely reversed by the application of either 10% ascorbic acid or 10% sodium ascorbate.
Morris
M D
MD
Department of Conservative Dentistry, Chonbuk University, Chonju, Korea.
Lee
K W
KW
Agee
K A
KA
Bouillaguet
S
S
Pashley
D H
DH
D000704:Analysis of Variance; D001205:Ascorbic Acid / Q000737:chemistry; D001896:Boron Compounds / Q000737:chemistry; D001840:Dental Bonding; D019232:Dental Restoration Failure; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D004492:Edetic Acid / Q000737:chemistry*; D006801:Humans; D008689:Methacrylates / Q000737:chemistry; D008768:Methylmethacrylates / Q000737:chemistry; D010545:Peroxides / Q000737:chemistry*; D011897:Random Allocation; D019279:Resin Cements / Q000737:chemistry*; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012388:Root Canal Irrigants / Q000737:chemistry*; D012973:Sodium Hypochlorite / Q000737:chemistry*; D018709:Statistics, Nonparametric; D014508:Urea / Q000737:chemistry*; D014885:Waxes / Q000737:chemistry*
D001896:Boron Compounds; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D008768:Methylmethacrylates; D010545:Peroxides; D019279:Resin Cements; D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; D014885:Waxes; C025081:RC-Prep; D014508:Urea; C049495:Super-bond; D004492:Edetic Acid; D012973:Sodium Hypochlorite; D001205:Ascorbic Acid