Effect of curing mode on bond strength of self-adhesive resin luting cements to dentin

In this study, the in vitro bond strength of dual‐curing resin cements to indirect composite restorations when the cement was either light polymerized or allowed to only autopolymerize was evaluated. Occlusal dentin surfaces of 56 extracted human third molars were flattened to expose coronal dentin....

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Published in:Journal of biomedical materials research. Part B, Applied biomaterials Applied biomaterials, 2010-04, Vol.93B (1), p.122-127
Main Authors: Aguiar, T. R., Di Francescantonio, M., Ambrosano, G. M. B., Giannini, M.
Format: Article
Language:English
Subjects:
bond strength
cementation
Composite Resins
Curing Lights, Dental
curing mode
Dental Restoration Failure
Dental Restoration, Permanent
Dental Stress Analysis
Dentin
Dentin-Bonding Agents
Humans
In Vitro Techniques
Materials Testing
Resin Cements
Self-Curing of Dental Resins - methods
Shear Strength
Surface Properties
Tensile Strength
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Summary:In this study, the in vitro bond strength of dual‐curing resin cements to indirect composite restorations when the cement was either light polymerized or allowed to only autopolymerize was evaluated. Occlusal dentin surfaces of 56 extracted human third molars were flattened to expose coronal dentin. Teeth were assigned to eight groups (n = 7) according to resin cement products and polymerization modes: conventional cement (Panavia F 2.0; Kuraray Medical) and self‐adhesive cements [RelyX Unicem (3M ESPE), BisCem (Bisco), and G‐Cem (GC Corp.)]. Cements were applied to prepolymerized resin discs (2‐mm‐thick Sinfony; 3M ESPE), which were subsequently bonded to the prepared dentin surfaces. The restored teeth were either light‐polymerized through the overlying composite according to manufacturers' instructions or were allowed to only self‐cure. After 24 h, the teeth and restorations were sectioned to obtain multiple bonded beams (1.0 mm2) and tested in tension at a crosshead speed of 0.5 mm/min until failure. Data (MPa) were analyzed by two‐way ANOVA and Tukey test (α = 0.05). Light activation of some cement systems (G‐Cem and Panavia F 2.0) increased the bond strength, while the curing mode did not affect the bond strength for some (RelyX Unicem and BisCem). The bond strength in the autopolymerized mode varied among products. In general, the use of self‐adhesive resin cements did not provide significantly higher bond strengths than that of a conventional material, and two self‐adhesive cements yielded significantly lower bond values (regardless of cure mode) than the other products. © 2010 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2010
ISSN:1552-4973
1552-4981
1552-4981
DOI:10.1002/jbm.b.31566