Investigation of the effect of different application techniques on microhardness in bulk-fill composite resins

Muhammet Fidan(1), Hakan Yasin Gönder(2)
(1) Necmettin Erbakan University, Faculty of Dentistry, Department of Restorative Dentistry, Konya, Turkey,
(2) Necmettin Erbakan University, Faculty of Dentistry, Department of Restorative Dentistry, Konya, Turkey

Abstract

Aim: The aim of this study was to investigate the effect of different application techniques on microhardness in one universal resin material and three different bulk-fill composite resin materials.


Materials and Methods: In this study, one universal composite resin (Universal Restorative 200 [U], 3M-ESPE, USA) and three different bulk-fill composite resins (Filtek-One Bulk-Fill Restorative [F]; 3M-ESPE, USA: Tetric Evo-Ceram Bulk-Fill [E]; and Ivoclar-Vivadent, Liechtenstein; Tetric N-Ceram Bulk-Fill [N], Ivoclar-Vivadent, Liechtenstein) materials were used. A total of 60 disk-shaped samples, including 20 samples from each bulk-fill composite resin group, were prepared. The polymerization of the bulk-fill composite resins in one group was completed using a 2 mm (40 sec) + 2 mm (40 sec) incremental technique, and in the other group, it was completed using a 4 mm bulk technique (40 sec). The U composite resin (control group) polymerization was completed using a 2 mm + 2 mm (40 sec) incremental technique (n = 10). The Vickers microhardness (VHN) values ​​of the samples were calculated. The data were analyzed with Kruskal–Wallis and Mann–Whitney U tests (p < 0.05).


Results: Higher VHN values ​​were found in the U composite resin compared to those in the bulk-fill composite resins (p < 0.05). In the bulk technique, a lower VHN value ​​was observed in the N bulk-fill composite resin than in the control group (p < 0.05), while there was no difference between the N and E composite resin groups (p > 0.05). A lower N bulk-fill composite resin was observed in the groups in which the incremental technique was applied than in the control group (p < 0.05). When the techniques applied to the bulk-fill composite resins were evaluated within themselves, higher VHN values ​​were observed in the E composite resin in the group in which the incremental technique was applied but not in the group in which the bulk was applied.


Conclusion: It was observed that the content differences of composite resins were effective at different VHN values. The U composite resin (control) group showed higher VHN values than all the bulk-fill composite groups.


 


How to cite this article: Fidan M, Gönder HY. Investigation of the effect of different application techniques on microhardness in bulk-fill composite resins. Int Dent Res 2021;11(Suppl.1):32-7. https://doi.org/10.5577/intdentres.2021.vol11.suppl1.6


 


Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

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Authors

Muhammet Fidan
muhammetfidan93@gmail.com (Primary Contact)
Hakan Yasin Gönder
Fidan, M., & Gönder, H. Y. (2021). Investigation of the effect of different application techniques on microhardness in bulk-fill composite resins. International Dental Research, 11(Suppl. 1), 32-37. https://doi.org/10.5577/intdentres.2021.vol11.suppl1.6

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How to Cite

Fidan, M., & Gönder, H. Y. (2021). Investigation of the effect of different application techniques on microhardness in bulk-fill composite resins. International Dental Research, 11(Suppl. 1), 32-37. https://doi.org/10.5577/intdentres.2021.vol11.suppl1.6
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