J Korean Acad Conserv Dent.  2008 Mar;33(2):98-106. 10.5395/JKACD.2008.33.2.098.

Effect of irrigation methods on the adhesion of Resilon/Epiphany sealer and gutta-percha/AH 26 sealer to intracanal dentin

• Kim SK
• Hwang YC
• Hwang IN
• Oh WM

• KMID: 1986754
• DOI: http://doi.org/10.5395/JKACD.2008.33.2.098

Abstract

The purpose of this study was to evaluate whether intracanal irrigation method could affect the adhesion between intracanal dentin and root canal filling materials (Gutta-percha/AH 26 sealer and Resilon/Epiphany sealer). Thirty extracted human incisor teeth were prepared. Canals were irrigated with three different irrigation methods as a final rinse and obturated with two different canal filling materials (G groups : Gutta-percha/AH 26 sealer, R groups : Resilon/Epiphany sealer) respectively. Group G1, R1 - irrigated with 5.25% NaOCl. Group G2, R2 - irrigated with 5.25% NaOCl, sterile saline. Group G3, R3 - irrigated with 5.25% NaOCl, 17% EDTA, sterile saline. Thirty obturated roots were horizontally sliced and push-out bond strength test was performed in the universal testing machine. After test, the failure patterns of the specimens were observed using Image-analyzing microscope. The results were as follows. 1. Gutta-percha/AH 26 sealer groups had significantly higher push-out bond strength compared with the Resilon/Epiphany sealer groups (p < 0.05). 2. Push-out bond strength was higher when using 17% EDTA followed by sterile saline than using NaOCl as a final irrigation solution in the Resilon/Epiphany sealer groups (p < 0.05). 3. In the failure pattern analysis, there was no cohesive failure in Group G1, G2, and R1. Gutta-percha/AH 26 sealer groups appeared to exhibit predominantly adhesive and mixed failure patterns, whereas Resilon/Epiphany sealer groups exhibited mixed failures with the cohesive failure occurred within the Resilon substrate.

Keyword

Push-out bond strength; Gutta-percha/AH 26 sealer; Resilon/Epiphany sealer; Obturation materials; Irrigation methods

MeSH Terms

Adhesives
Collodion
Dentin
Edetic Acid
Humans
Incisor
Root Canal Filling Materials
Tooth
Adhesives
Collodion
Edetic Acid
Root Canal Filling Materials

Figure

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  Figure 1 Diagram for the push-out bond strength test7).

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  Figure 2 Comparison of push-out bond strength for same obturation systems. *statistically significant (p < 0.05)

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  Figure 3 Comparison of push-out bond strength for same irrigation methods. *statistically significant (p < 0.05).

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  Figure 4 Failure patterns in Gutta-percha/AH 26 sealer groups. A. Type I adhesive failure between the AH 26 sealer and dentin (× 800) B. Type II adhesive failure between the Gutta-percha and AH 26 sealer (× 800) C. Cohesive failure within the Gutta-percha (× 800) Abbreviation. G : Gutta-percha, S : AH 26 sealer, D : dentin

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  Figure 5 Failure patterns in Resilon/Epiphany sealer groups. A. Type I adhesive failure between the Epiphany sealer and dentin (× 800) B. Type II adhesive failure between the Resilon and Epiphany sealer (× 800) C. Cohesive failure within the Resilon (× 800) D. Cohesive failure within the Resilon representing monoblock concept (× 800) Abbreviation. R : Resilon, S : Epiphany sealer, D : dentin

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