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


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

Article information

Restor Dent Endod. 2008;33(2):98-106
Publication date (electronic) : 2008 March 31
doi : https://doi.org/10.5395/JKACD.2008.33.2.098
Seo-Kyong Kim, Yun-Chan Hwang, In-Nam Hwang, Won-Mann Oh
Department of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University, BK21, Korea.
Corresponding Author: Won-Mann Oh. Department of Conservative Dentistry, School of Dentistry, Chonnam National University, 8 Hak-dong, Dong-gu, Gwangju 501-757, Korea. Tel: 82-62-220-4431, Fax: 82-62-225-8387, wmoh@chonnam.ac.kr
Received 2008 January 24; Revised 2008 February 19; Accepted 2008 March 04.

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.

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

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Article information Continued

Copyright © 2008 Korean Academy of Conservative Dentistry
(open-access) :

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Figure 1

Figure 1

Diagram for the push-out bond strength test7).

Figure 2

Figure 2

Comparison of push-out bond strength for same obturation systems.

*statistically significant (p < 0.05)

Figure 3

Figure 3

Comparison of push-out bond strength for same irrigation methods.

*statistically significant (p < 0.05).

Figure 4

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

Figure 5

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

Table 1

Group classification

Table 1

Table 2

Push-out bond strength for each group (Mean ± S.D. (MPa))

Table 2

Table 3

Failure pattern analysis

Table 3