Chemical characterization of the resin-dentin interface by micro-Raman spectroscopy.
The chemical nature of the interface between dentin and adhesive resin materials was characterized by micro-Raman spectroscopy. The resulting chemical profiles were correlated with photomicrographs obtained by SEM after an argon-ion-beam etching treatment of the sample surface. Two commercially available dentin adhesive systems, of which one was also applied with a different conditioning agent, were investigated. Raman spectra, which were recorded along line scans across the interface with a step increment of 1 micron, revealed that resin effectively penetrated 4 to 6 microns deep into the superficially decalcified dentin zone. Across the interface, a gradual transition from resin to dentin over the interdiffusion zone with a mixed contribution of both substances was noticed. Finally, resin appeared to penetrate to the entire decalcification depth of dentin regardless of the aggressiveness of the conditioning procedure.
Van Meerbeek
B
B
Department of Operative Dentistry and Dental Materials, Katholieke Universiteit te Leuven, Belgium.
Mohrbacher
H
H
Celis
J P
JP
Roos
J R
JR
Braem
M
M
Lambrechts
P
P
Vanherle
G
G
D001896:Boron Compounds; D001840:Dental Bonding; D003804:Dentin / Q000737:chemistry* / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000032:analysis / Q000737:chemistry*; D004058:Diffusion; D006801:Humans; D008689:Methacrylates; D008768:Methylmethacrylates; D008855:Microscopy, Electron, Scanning; D010756:Phosphoric Acids / Q000494:pharmacology; D019279:Resin Cements; D013059:Spectrum Analysis, Raman / Q000379:methods; D013499:Surface Properties
D001896:Boron Compounds; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D008768:Methylmethacrylates; D010756:Phosphoric Acids; D019279:Resin Cements; C041330:Scotchbond; C049495:Super-bond