Application Modes Affect Two Universal Adhesive Systems’ Nanoleakage Expression and Shear Bond Strength

Biomed Res Int. 2021 Sep 30;2021:7375779. doi: 10.1155/2021/7375779. eCollection 2021.

ABSTRACT

OBJECTIVES: The aim of this study was to evaluate the shear bond strength and the nanoleakage expression of CLEARFIL Universal Bond Quick and Tetric N-Bond adhesive systems bonded to dentin.

MATERIALS AND METHODS: 100 freshly extracted human premolar teeth were utilized. The teeth were sectioned to expose dentin. All dentin specimens were assigned into 4 experimental groups; 2 groups had Universal Bond Quick (Universal_self group) and Tetric N-Bond (Tetric_self group) applied in the self-etch mode, while 2 groups had Universal Bond Quick (Universal_total group) and Tetric N-Bond (Tetric_total group) applied in the total-etch mode. n = 15 for shear bond strength and n = 10 for nanoleakage experiment. One-way ANOVA and Kruskal-Wallis test were utilized to analyze the shear bond strength test and the nanoleakage expression, respectively.

RESULTS: The highest significant bond strength value was recorded by the Tetric_self specimens (p < 0.05) when compared to the remaining three groups. There were no statistically significant differences between the shear bond strength values recorded in the Tetric_total, Universal_self, and Universal_total groups (p < 0.05). Both bonding systems applied in the self-etch mode (Universal_self, Tetric_self) had no silver nitrate deposits in the hybrid layer and the hybrid layer-adhesive interface (p < 0.001); however, both bonding systems applied in the total-etch mode (Universal_total, Tetric_total) had silver nitrate deposits in the hybrid layer, the hybrid layer-adhesive interface, and the bonding layer (p < 0.001).

CONCLUSION: Applying the Universal Bond Quick and Tetric N-Bond in the self-etch mode exhibited better results in terms of nanoleakage expression. Universal Bond Quick showed the stability of the shear bond strength to dentin when applied using the total-etch or self-etch modes. Tetric N-Bond showed significant deterioration in bond strength when applied in the total-etch mode and exhibited the highest bond strength when applied in the self-etch mode.

PMID:34631886 | PMC:PMC8497110 | DOI:10.1155/2021/7375779