Bonding to dentin. Clues to the mechanism of adhesion.
OBJECTIVE
To investigate the effect on shear bond strength of the presence or absence of the demineralized collagen layer on both wet and dried etched dentin surfaces.


METHODS
Composite cylinders were mounted on dentin surfaces after the following treatments; 37% etch/wet, 37% etch/dry, 37% etch/NaOCl/wet, 37% etch/NaOCl/dry, No-etch/wet, No-etch/dry, No-etch/NaOCl/wet, No-etch/NaOCl/dry. 24-hr shear bond strength data was obtained. SEM examinations of various surfaces were also conducted.


RESULTS
Wet bonded specimens had significantly higher shear bond strengths, with or without the presence of the demineralized collagen layer, whether they were acid-treated or not. Acid-etched specimens had significantly higher shear bond strengths than unetched specimens.
Kanca
J
J
Sandrik
J
J
D000134:Acid Etching, Dental / Q000379:methods; D000268:Adhesiveness; D000704:Analysis of Variance; D003094:Collagen / Q000187:drug effects; D001840:Dental Bonding / Q000379:methods*; D003804:Dentin / Q000187:drug effects / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D010756:Phosphoric Acids / Q000494:pharmacology; D019279:Resin Cements; D016369:Smear Layer; D012973:Sodium Hypochlorite / Q000494:pharmacology; D013499:Surface Properties; D017155:Wettability
C103506:Bis-GMA, BPDM, HEMA dental-bonding resin; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D010756:Phosphoric Acids; D019279:Resin Cements; D003094:Collagen; D012973:Sodium Hypochlorite