Assessing Fracture Resistance of non Vital Teeth Using Two Different Composite Systems: Short-Fibre-Reinforced Composite and Glass Fibre Post with Microfilled Hybrid Composite

Sanda Ileana Cîmpean ,Victorita Stefanescu,Ada Gabriela Delean,Smaranda Buduru,Sorin Berbece,Adrian Beznea,Doina Carina Voinescu,Marius Negucioiu,Mărioara Moldovan ,Liliana Lăcrămioara Pavel ,Daniela Florea ,Cristian Dudescu ,Ioana-Sofia Pop-Ciutrilă

doi:10.37358/mp.20.4.5427

Abstract

Posterior endodontically treated teeth are exposed to risk fracture due to the great masticatory forces developed in the area. Fiberglass posts are considered a practical solution for such situations, but their main disadvantage yet remains the poor adhesion to the remaining tooth structures. The purpose of the present study was to evaluate a material that could replace the use of fiberglass posts on posterior teeth. 32 premolars were selected and divided into 4 groups (n=8): the first group was considered the control group; the second group was composed of endodontically treated teeth that were filled with gutta-percha, but without any coronal restoration; the third group was composed of teeth that received the same endodontic treatment as in the second group but were restored with a fibreglass post and a light cured microfilled hybrid composite material; the fourth group was similar to the third one, except teeth were restored with a short-fibre-reinforced composite (EverX Posterior, GC Europe N.V., Leuven, Belgium) and a microfilled hybrid composite over it. The fracture resistance of all the teeth was tested using a universal testing device. One-way ANOVA and the Tukey post-hoc variation tests for multiple comparisons were used to analyze the results. The short-fibre-reinforced composite material increased the fracture resistance of endodontically treated teeth (1159.42 N), twice as much as that obtained by using fiberglass posts (522.35 N)). Within the limitations of the present study, EverX Posterior represents a better alternative compared to fiberglass posts in the crown and root reconstruction of posterior endodontically treated teeth.

Highlights

Ensuring fracture resistance of endodontically treated teeth in the lateral area, on which the masticatory forces predominantly act, is one of the major challenges of research in the dental field
The purpose of the present study was to evaluate the fracture strength of a recent fiberglass reinforced resin material (EverX Posterior; GC Europe NV, Leuven, Belgium) compared to that of fiberglass posts applied to endodontically treated teeth
The comparison between the fracture resistance values of the 4 groups of teeth is represented in the graphics of Figures 8 and 9

Summary

Introduction

Ensuring fracture resistance of endodontically treated teeth in the lateral area, on which the masticatory forces predominantly act, is one of the major challenges of research in the dental field These teeth are generally more susceptible to fracture compared to vital teeth. Increased resistance to fracture of teeth occurs due to the fact that the fiberglass posts, with a modulus of elasticity similar to that of the tooth, have the role of distributing masticatory forces along the root and in the periodontal tissues [13,14,15,16,17,18]. The major problem of fiberglass posts remains the adhesion to root dentin, the weakest link of this chain of reconstructive materials

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Conclusion