J Korean Acad Conserv Dent.  2009 Sep;34(5):397-405. 10.5395/JKACD.2009.34.5.397.

Effect of an intermediate bonding resin and flowable resin on the compatibility of two-step total etching adhesives with a self-curing composite resin

• Choi SK
• Yum JW
• Kim HC
• Hur B
• Park JK

• KMID: 1986602
• DOI: http://doi.org/10.5395/JKACD.2009.34.5.397

Abstract

This study compared the effect of an activator, intermediate bonding resin and low-viscosity flowable resin on the microtensile bond strength of a self-curing composite resin used with two-step total etching adhesives. Twenty extracted permanent molars were used. The teeth were assigned randomly to nine groups (n=10) according to the adhesive system and application of additional methods (activator, intermediate adhesive, flowable resin). The bonding agents and additional applications of each group were applied to the dentin surfaces. Self-curing composite resin buildups were made for each tooth to form a core, 5mm in height. The restored teeth were then stored in distilled water at room temperature for 24h before sectioning. The microtensile bond strength of all specimens was examined. The data was analyzed statistically by one-way ANOVA and a Scheffe's test. The application of an intermediate bonding resin (Optibond FL adhesive) and low-viscosity flowable resin (Tetric N-flow) produced higher bond strength than that with the activator in all groups. Regardless of the method selected, Optibond solo plus produced the lowest microTBS to dentin. The failure modes of the tested dentin bonding agents were mostly adhesive failure but there were some cases showed cohesive failure in the resin.

Keyword

activator; intermediate bonding resin; low-viscosity flowable resin; self cure composite resin; microtensile bond strength

MeSH Terms

Adhesives
Dentin
Dentin-Bonding Agents
Molar
Resin Cements
Tooth
Water
Adhesives
Dentin-Bonding Agents
Resin Cements
Water

Figure

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  Figure 1 Restorative procedure of experimental groups

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  Figure 2 µTBS of three dentin bonding agents in same application method. The subgroups under the horizontal line were not significantly different (p > 0.05).

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