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Dentin treatment effects on the bonding performance of self‐adhesive resin cements
Author(s) -
Mazzitelli Claudia,
Monticelli Francesca,
Toledano Manuel,
Ferrari Marco,
Osorio Raquel
Publication year - 2010
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.2009.00703.x
Subject(s) - dentin , polyacrylic acid , adhesive , bond strength , materials science , molar , dentinal tubule , composite material , smear layer , cement , methacrylate , dental bonding , scanning electron microscope , dentistry , layer (electronics) , polymerization , polymer , medicine
Mazzitelli C, Monticelli F, Toledano M, Ferrari M, Osorio R. Dentin treatment effects on the bonding performance of self‐adhesive resin cements. Eur J Oral Sci 2010; 118: 80–86. © 2010 The Authors. Journal compilation © 2010 Eur J Oral Sci The effects of dentin surface treatments on the microtensile bond strengths and on the interfacial characteristics of self‐adhesive resin cements were investigated. Flat dentin surfaces were obtained from human molars and were treated as follows: (i) no treatment of dentin; (ii) 0.1 M EDTA scrubbed for 60 s; or (iii) 10% polyacrylic acid applied for 30 s. Three self‐adhesive cements were used to lute composite overlays on deep‐coronal dentin surfaces in the presence of simulated pulpal pressure (15 cm of H 2 O). Bonded specimens were cut into beams 1 mm thick and stressed in tension until failure. Fractured sticks were examined under a scanning electron microscope. Additional specimens were stained with Masson’s trichrome and observed under light microscopy for interfacial evaluations. The bond strength to dentin of the hydrophobic and solvent‐free cement (RelyX Unicem) was unaffected by the tested dentin treatments. The bond strength of the 2‐hydroxyethyl methacrylate (HEMA)‐based cement (Bis‐Cem) decreased after treatment of dentin with EDTA and/or polyacrylic acid. The hydrophilic and water‐containing cement (G‐Cem) attained a higher bond strength when luted on polyacrylic acid‐conditioned dentin. In conclusion, smear layer removal, opening of dentinal tubules, and the water content of dentin differently influence the bond strengths and the interfacial characteristics of self‐adhesive cement–dentin interfaces.