Limited Decalcification/Diffusion of Self-adhesive Cements into Dentin

• Published in: Journal of dental research Vol. 87; no. 10; pp. 974 - 979
• Main Authors: Monticelli, F., Osorio, R., Mazzitelli, C., Ferrari, M., Toledano, M.
• Format: Journal Article
• Language: English
• Published: United States SAGE Publications 01-10-2008; SAGE PUBLICATIONS, INC
• Subjects: Dental Etching - methods; Dentin - drug effects; Dentin Permeability; Dentin-Bonding Agents; Dentistry; Diffusion; Humans; Microscopy, Electron, Scanning; Resin Cements; Smear Layer; Tooth Demineralization; demineralization; smear layer; Masson’s trichrome; exposed collagen; self-adhesive cement
• ISSN: 0022-0345; 1544-0591
• DOI: 10.1177/154405910808701012

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.