Compressive strength and fractographic analysis of tooth crown models made of a short glass fibre-reinforced composite material
1
Private Practice of Dentistry “Perfekt Dent” ul. Ułanów 1, 20-554 Lublin
2
Faculty of Mechanical Engineering, Department of Materials Engineering, Lublin University of Technology, ul. Nadbystrzycka 36, 20-618 Lublin
3
Graduate of Lublin University of Technology, ul. Nadbystrzycka 36, 20-618 Lublin
4
Faculty of Medicine and Dentistry, Department of Conservative Dentistry with Endodontics, Medical University of Lublin, ul. Chodźki 6 20-093 Lublin
These authors had equal contribution to this work
Corresponding author
Monika Ostapiuk
Faculty of Mechanical Engineering, Department of Materials Engineering, Lublin University of Technology, ul. Nadbystrzycka 36, 20-618 Lublin
Faculty of Mechanical Engineering, Department of Materials Engineering, Lublin University of Technology, ul. Nadbystrzycka 36, 20-618 Lublin
Adv. Sci. Technol. Res. J. 2025; 19(9):516-522
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ABSTRACT
The objective of this study was to evaluate the compressive strength of a glass fibre reinforced (GFR) composite material used in restorative conservative dentistry. The following dental composites were used in the work: EverX Posterior (GC Europe) GFR composite and Filtek Z250 (3M ESPE) conventional composite for fabricating phantoms which imitated molar crowns. Compression tests were performed and an analysis is provided here for the fractures formed during the application of compressive forces. It was found that the short fibres, rather than the polymer matrix itself, were responsible for the load transfer. The voids visible after removal of the fibres and the cracks in the polymer matrix are indicative of a force required to cause a GFR composite failure that is higher than the force required to cause a conventional composite filling failure. The phantoms made of the GFR composite showed greater strength than polymer-filled phantoms, devoid of short glass fibres.
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