J Korean Acad Conserv Dent.  2006 May;31(3):147-152. 10.5395/JKACD.2006.31.3.147.

The influence of AH-26 and zinc oxide-eugenol root canal sealer on the shear bond strength of composite resin to dentin

• Cho JY
• Jin MU
• Kim YK
• Kim SK

• KMID: 2175813
• DOI: http://doi.org/10.5395/JKACD.2006.31.3.147

Abstract

The purpose of this study was to evaluate the influence of the AH-26 root canal sealer on the shear bond strength of composite resin to dentin. One hundred and forty four (144) extracted, sound human molars were used. After embedding in a cylindrical mold, the occlusal part of the anatomical crown was cut away and trimmed in order to create a flat dentin surface. The teeth were randomly divided into three groups; the AH-26 sealer was applied to the AH-26 group, and zinc-oxide eugenol (ZOE) paste was applied to the ZOE group. The dentin surface of the control group did not receive any sealer. A mount jig was placed against the surface of the teeth and the One-step dentin bonding agent was applied after acid etching. Charisma composite resin was packed into the mold and light cured. After polymerization, the alignment tube and mold were removed and the specimens were placed in distilled water at 37degrees C for twenty four hours. The shear bond strength was measured by an Instron testing machine. The data for each group were subjected to one-way ANOVA and Tukey's studentized rank test so as to make comparisons between the groups. The AH-26 group and the control group showed significantly higher shear bond strength than the ZOE group (p < 0.05). There were no significant differences between the AH-26 group and the control one (p > 0.05). Under the conditions of this study, the AH-26 root canal sealer did not seem to affect the shear bond strength of the composite resin to dentin while the ZOE sealer did. Therefore, there may be no decrease in bond strength when the composite resin core is built up immediately after a canal filling with AH-26 as a root canal sealer.

Keyword

AH-26; ZOE sealer; Root canal sealer; Shear bond strength to dentin; Composite resin core

MeSH Terms

Crowns
Dental Pulp Cavity*
Dentin*
Eugenol
Fungi
Humans
Molar
Polymerization
Polymers
Tooth
Water
Zinc*
Eugenol
Polymers
Water
Zinc

Figure

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  Figure 1 Schematic diagram of the specimen for the shear bond test.

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  Figure 2 Shear bond strength of composite resin to dentin (Mean ± S.D.). *Statistically significant (p < 0.05).

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