Shear bond strength of self-etching adhesive systems to Er:YAG-laser-prepared dentin.
This study was conducted to compare the shear bond strengths of composite resin bonded to Er:YAG laser or bur-prepared dentin surfaces using three self-etching adhesive systems. The occlusal surfaces of 120 human third molars were ground flat to expose dentin. The dentin was prepared using either a carbide bur or an Er:YAG laser at 350 mJ/pulse and 10 Hz (fluence, 44.5 J/cm(2)). Three different self-etching adhesive systems were applied: iBond, Xeno III and Clearfil SE Bond. Rods of composite resin were bonded to dentin surfaces and shear bond tests were carried out. Both dentin surfaces after debonding and resin rods were observed using a scanning electron microscope. When the Xeno III was used, no difference was observed on shear bond strength values when bur and Er:YAG laser were compared. When using iBond and Clearfil SE Bond, bond strength values measured on Er:YAG-laser-prepared surfaces were lower than those observed on bur-prepared surfaces. The absence of smear layer formation during the preparation of the dentin by the Er:YAG laser did not improve the adhesion values of self-etching adhesive systems.
Brulat
Nathalie
N
Laboratory of Surfaces and Interfaces in Odontology, University of Nice-Sophia Antipolis, Nice, France.
Rocca
Jean-Paul
JP
Leforestier
Eric
E
Fiorucci
Gilbert
G
Nammour
Samir
S
Bertrand
Marie-France
MF
D000268:Adhesiveness; D003188:Composite Resins; D003804:Dentin / Q000528:radiation effects*; D053844:Lasers, Solid-State; D008855:Microscopy, Electron, Scanning; D033081:Shear Strength; D013499:Surface Properties
D003188:Composite Resins