Objective: evaluate the influence of single- or double-layer application of a universal adhesive on the bond strength to different tooth substrates.
Methods: To Seventy-two extracted sound human teeth were used for the study. The teeth were divided into three groups according to tooth substrates; enamel, coronal and radicular dentin (n=24). The roots of the teeth were separated from the crowns and then abraded to obtain flat surfaces. The specimens were randomly allocated into 2 groups in accordance with application layers of universal adhesive (n=12). The universal adhesive, Adhese Universal was applied in self-etch mode as single- or double-layer (without light-curing of the first layer) to different substrates. Following the adhesive application, enamel, coronal- and radicular dentin substrates were restored with a resin composite (Tetric N-Ceram). The specimens were subjected to shear bond strength (SBS) test after storage in distilled water (37℃,24 h). Representative fractured and interface samples from each group were examined by a scanning electron microscope. The data were analyzed using two-way ANOVA(α = 0.05).
Results: There was no statistically difference in SBS values between single- and double-layer applications of the tested universal adhesive on different dental substrates (p>0.05). Whilst no difference was occurred between the different dental substrates in the single-layer application (p>0.05), double-layer application on coronal dentin presented significantly higher bond strength than enamel (p<0.05).
Conclusion: Double-layer application of the tested universal adhesive did not improve the bond strength regardless of different dental substrates.
Primary Language | English |
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Subjects | Health Care Administration |
Journal Section | Articles |
Authors | |
Publication Date | October 26, 2021 |
Submission Date | May 4, 2021 |
Published in Issue | Year 2021 Volume: 11 Issue: 4 |