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Journal of Dental Research, Vol. 87, No. 10, 974-979 (2008)
DOI: 10.1177/154405910808701012

Biomaterials & Bioengineering

Limited Decalcification/Diffusion of Self-adhesive Cements into Dentin

F. Monticelli1,2,*, R. Osorio1, C. Mazzitelli2, M. Ferrari2 and M. Toledano1

1 Department of Dental Materials, School of Dentistry, University of Granada, Spain; and
2 Department of Dental Materials and Restorative Dentistry, University of Siena, Policlinico "Le Scotte", Italy

Correspondence: * corresponding author, fmontice{at}unizoz.es

Resin cement diffusion into dentin may differ as a function of the pre-treatment regimen. Since self-adhesive cements do not require substrate pre-treatment for luting, penetration of and interaction with the underlying dentin are questioned. We hypothesized that differences in the resin cement diffusion into dentin may exist among current commercial adhesive cements. Composite cylinders were luted on mid-coronal dentinal surfaces by an etch-and-rinse cement (Calibra), a self-etching system (Panavia F 2.0), and 4 self-adhesive cements (Multilink Sprint, Rely X Unicem, G-Cem, Bis-Cem). Dentin/cement interfacial characteristics were analyzed by a staining technique (Masson’s trichrome) and by scanning electron microscopy. Conventional acid etching resulted in partially infiltrated adhesive interfaces differing from those achieved with the application of self-etching primer. No hybrid layer and/or resin tag formation was detectable at the interfaces bonded with self-adhesive cements. Limited decalcification/infiltration was observed for self-adhesive cements into the underlying dentin. Self-adhesive cements were not able to demineralize/dissolve the smear layer completely.

Key Words: self-adhesive cement • Masson’s trichrome • smear layer • demineralization • exposed collagen


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