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

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Objectives: This study evaluated the effects of intraradicular moisture on the pushoutbond strength of a fibre post luted with several self-adhesive resin cements. Materials and Methods: Endodontically treated root canals were treated with oneof three luting cements: (1) RelyX U100, (2) Clearfil SA, and (3) G-Cem. Roots werethen 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 remainedtotally flooded. Two 1-mm-thick slices were obtained from each root sample and bondstrength was measured using a push-out test setup. The data were analysed using atwo-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 thebond strength of luting cements (p < 0.05), with the exception of G-Cem. RelyX U100displayed the highest bond strength under moist conditions (III). Clearfil SA had thehighest bond strength under normal moisture conditions (II). Statistical ranking ofbond strength values was as follows: RelyX U100 > Clearfil SA > G-Cem. Conclusions:The degree of residual moisture significantly affected the adhesion of luting cements toradicular dentine.

Abstract

Objectives: This study evaluated the effects of intraradicular moisture on the pushoutbond strength of a fibre post luted with several self-adhesive resin cements. Materials and Methods: Endodontically treated root canals were treated with oneof three luting cements: (1) RelyX U100, (2) Clearfil SA, and (3) G-Cem. Roots werethen 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 remainedtotally flooded. Two 1-mm-thick slices were obtained from each root sample and bondstrength was measured using a push-out test setup. The data were analysed using atwo-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 thebond strength of luting cements (p < 0.05), with the exception of G-Cem. RelyX U100displayed the highest bond strength under moist conditions (III). Clearfil SA had thehighest bond strength under normal moisture conditions (II). Statistical ranking ofbond strength values was as follows: RelyX U100 > Clearfil SA > G-Cem. Conclusions:The degree of residual moisture significantly affected the adhesion of luting cements toradicular dentine.

참고문헌 (36)

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