Influence of NaOCl treatment of etched and dried dentin surface on bond strength and resin infiltration.
This study evaluated the effect of NaOCl treatment of etched air-dried dentin on the bond strength and state of monomer penetration. Ten percent NaOCl was applied after rinsing the etchant and air drying the dentin surface. Wet bonded, untreated teeth were used as a control. The resin composite was bonded and stored in 37 degrees C water for 24 hours, then shear tested. One-way ANOVA, followed by the Duncan test, was done. For Raman microscopy, bonded specimens were cut parallel to the dentinal tubules and polished. Raman spectra were successively recorded along lines perpendicular to the dentin-adhesive interface. The decreased bond strengths found with air-dried dentin increased with NaOCl treatment, but the highest bond strength was obtained with wet bonding. From Raman spectroscopy, the widths of demineralized dentin decreased with prolonged NaOCl treatment time. The patterns of gradual transition of components differed among the groups.
Nihon University Graduate School of Dentistry, Department of Operative Dentistry, Tokyo, Japan.
Hikaru
H
Sato
Masashi
M
Miyazaki
B Keith
BK
Moore
D000134:Acid Etching, Dental; D000704:Analysis of Variance; D000818:Animals; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002417:Cattle; D003188:Composite Resins / Q000737:chemistry; D003804:Dentin / Q000187:drug effects*; D033081:Shear Strength; D012973:Sodium Hypochlorite / Q000494:pharmacology*; D013059:Spectrum Analysis, Raman
D003188:Composite Resins; C444701:Filtek Z250; C115612:single bond; D017438:Bisphenol A-Glycidyl Methacrylate; D012973:Sodium Hypochlorite