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. 2016 Mar;17(1):1-6.

Assessment of the Shear Bond Strength between Nanofilled Composite Bonded to Glass-ionomer Cement Using Self-etch Adhesive with Different pHs and Total-Etch Adhesive

Farahnaz Sharafeddin  1 , Mohammad Mehdi Choobineh  2
Affiliations

Assessment of the Shear Bond Strength between Nanofilled Composite Bonded to Glass-ionomer Cement Using Self-etch Adhesive with Different pHs and Total-Etch Adhesive

Farahnaz Sharafeddin et al. J Dent (Shiraz). 2016 Mar.

Abstract

Statement of the problem: In the sandwich technique, the undesirable bond between the composite resin and glass-ionomer cement (GIc) is one of the most important factors which lead to the failure of restoration. Total-etch and self-etch adhesives may improve the bond strength based on their pH.

Purpose: The purpose of this study was to evaluate the shear bond strength between the nanofilled composite resin and GIc using different adhesives.

Materials and method: In this experimental study, 40 specimens (6×6mm) in 4 groups (n=10) were prepared in acrylic mold. Each specimen contained conventional GI ChemFil Superior with a height of 3mm, bonded to Z350 composite resin with a height measured 3mm. In order to bond the composite to the GI, the following adhesives were used, respectively: A: mild Clearfil SE Bond self-etch (pH=2), B: intermediate OptiBond self-etch (pH=1.4), C: strong Adper Prompt L-Pop (pH=1), and D: Adper Single Bond 2 total-etch (pH=7.2). The shear bond strength was measured by using universal testing machine with a crosshead speed of 1mm/min. One-way ANOVA and Tukey's test were used to analyze the data (p< 0.05).

Results: The shear bond strength in group A was significantly higher than group B (p= 0.002), C (p< 0.001), and D (p< 0.001). Moreover, the shear bond strength of groups A and B (self-etch) was significantly different from group D (total-etch) (p< 0.001); and C (self-etch) with D (p= 0.024).

Conclusion: The results of this study showed that applying the mild self-etch adhesive between the composite and the GIc results in stronger shear bond strength compared to intermediate and strong self-etch adhesives. Moreover, the self-etch adhesive increased the shear bond strength between composite resin and GIc more significantly than total-etch adhesive.

Keywords: Conventional Glass-ionomer Cement; Nanofilled Composite; Self-etch Adhesive; Shear Bond Strength; Total-etch Adhesive.

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Figures

Figure 1
Figure 1
a: Preparation of acrylic mold. b: Glass-ionomer in acrylic mold. c: Resin composite on the surface of glass ionomer.
Figure 2
Figure 2
Testing the shear bond strength by using universal testing machine.
Figure 3
Figure 3
The shear bond strength of the tested groups
See this image and copyright information in PMC

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