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. 2021 Jul-Aug;24(4):354-358.
doi: 10.4103/jcd.jcd_60_21. Epub 2022 Jan 13.

Does eugenol affect the microtensile bond strength of self-adhering composite? - An in vitro study

Shalini Rai  1 , Vineeta Nikhil  1 , Padmanabh Jha  1
Affiliations

Does eugenol affect the microtensile bond strength of self-adhering composite? - An in vitro study

Shalini Rai et al. J Conserv Dent. 2021 Jul-Aug.

Abstract

Objectives: The objective of the study is to evaluate the effect of eugenol-based temporary on microtensile bond strength of self-adhering composite at 1 day and 7-day time intervals.

Materials and methods: Occlusal enamel of 24 human molars was removed. Zinc oxide eugenol (ZnOE) and noneugenol temporary cement (ZnONE) were placed on the dentin surfaces and left for different times (1 day, 7 days). After removal of temporary cement, teeth were randomly divided into eight subgroups: subgroup GE1S (n = 3): ZnOE cement + Self-adhering composite (SAC), subgroup GE1N (n = 3): ZnOE cement + adhesive system (one coat 7 universal) + nanohybrid composite, subgroup GE7S (n = 3): ZnOE cement + SAC, subgroup GE7N (n = 3): ZnOE cement + adhesive system + nanohybrid composite, subgroup GNE1S (n = 3): ZnONE cement + SAC, subgroup GNE1N (n = 3): ZnONE cement + adhesive system + nanohybrid composite, subgroup GNE7S (n = 3): ZnONE cement + SAC, subgroup GNE7N (n = 3): ZnONE cement + adhesive system + nanohybrid composite. Four sticks per tooth were obtained, resulting in 12 sticks per group with a cross-sectional area of 0.5 mm 2. The μTBS test was performed with a crosshead speed of 0.5 mm/min.

Statistical analysis: Kruskal-Wallis and Mann-Whitney U-test were used for analysis.

Results: Highest and lowest mean value of microtensile bond strength was observed in GNE7N (12.75MPa) and GE1S (1.42MPa), respectively.

Conclusion: The presence of eugenol at early stage, i.e. 1 day, has a negative influence on microtensile bond strength of SAC. At 7 days, the negative effect of eugenol on microtensile bond strength gets nullified. Thus, a waiting period of 1 week is sufficient to overcome negative influence of eugenol-based temporaries on polymerization of SAC.

Keywords: Cavit; IRM; composite resin; eugenol; microtensile bond strength; self-etch adhesive.

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Conflict of interest statement

There are no conflicts of interest.

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