Analysis of the bond interface between self-adhesive resin cement to eroded dentin in vitro
Fig 2
Scanning electron microscopy analysis of the different groups in sound and eroded dentin, 8 months after the adhesive process.
(A) Control group–sound dentin. Few or no presence of cement on the dentin, without exposure of the dentinal tubules (asterisks). (B) Control group–eroded dentin, showing the presence of mixed failure, with smear layer areas (asterisks) surrounded by resin cement (arrows). (C) 2% Chlorhexidine group–sound dentin. Presence of the resin cement on the dentin surface (asterisks), without exposure of the dentinal tubules. (D) 2% Chlorhexidine group–eroded dentin. Presence of the resin cement on the dentin surface (asterisks), whit few exposure of the dentinal tubules (arrows). (E) 20% Polyacrylic acid group–sound dentin. Few exposure of the dentinal tubules (asterisks). (F) 20% Polyacrylic acid group–eroded dentin. It is evidenced the presence of resinous material on the smear layer (asterisks) and many dentinal tubules exposed on the surface, with exposure of the collagen fibers (arrows); most of the exposed tubules are obliterated. (G) 0.1 M EDTA group–sound dentin, evidencing the presence of resin cement (asterisks), with few exposure of the dentinal tubules (arrow). (H) 0.1 M EDTA group–eroded dentin, evidencing the presence of a few exposed tubules on the surface and others filled by the resin cement (asterisks). Magnification 1000x.