Restor Dent Endod.  2013 Nov;38(4):234-240.

Effects of dentin moisture on the push-out bond strength of a fiber post luted with different self-adhesive resin cements

• Aktemur Turker S
• Uzunoglu E
• Yilmaz Z

Abstract

OBJECTIVES
This study evaluated the effects of intraradicular moisture on the pushout bond strength of a fibre post luted with several self-adhesive resin cements.
MATERIALS AND METHODS
Endodontically treated root canals were treated with one of three luting cements: (1) RelyX U100, (2) Clearfil SA, and (3) G-Cem. Roots were then divided into four subgroups according to the moisture condition tested: (I) dry: excess water removed with paper points followed by dehydration with 95% ethanol, (II) normal moisture: canals blot-dried with paper points until appearing dry, (III) moist: canals dried by low vacuum using a Luer adapter, and (IV) wet: canals remained totally flooded. Two 1-mm-thick slices were obtained from each root sample and bond strength was measured using a push-out test setup. The data were analysed using a two-way analysis of variance and the Bonferroni post hoc test with p = 0.05.
RESULTS
Statistical analysis demonstrated that moisture levels had a significant effect on the bond strength of luting cements (p < 0.05), with the exception of G-Cem. RelyX U100 displayed the highest bond strength under moist conditions (III). Clearfil SA had the highest bond strength under normal moisture conditions (II). Statistical ranking of bond strength values was as follows: RelyX U100 > Clearfil SA > G-Cem.
CONCLUSIONS
The degree of residual moisture significantly affected the adhesion of luting cements to radicular dentine.

Keyword

Dentine moisture; Push-out; Self-adhesive resin cement

MeSH Terms

Dehydration
Dental Pulp Cavity
Dentin*
Ethanol
Nerve Fibers, Myelinated*
Resin Cements*
Vacuum
Water
Ethanol
Resin Cements
Water

Figure

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  Figure 1 Push-out bond strengths (MPa) of self adhesive cements with respect to the experimental moisture conditions.

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