Fracture Mode Analysis and Assessment of Fiber-Post Insertion On Fracture Resistance of Endodontically Treated Anterior Maxillary Teeth

Abstract

Background: The present study aimed to assess the resistance to fracture and analyze the failure mode of root canal treated anterior teeth with and without application of fiber post. Materials and methods: forty-five sound upper central incisor teeth were collected, then allocated into three main groups, (n=15/each), regarding post application (Group ‘A’: sound teeth, Group ‘B’: root canal treated teeth, Group ‘C’: root canal treated teeth with post insertion). Root canal treatment was performed, and the prepared canals were obturated using gutta-percha. The tested fiber-posts were inserted, and then adhesively cemented inside the prepared root canals of the assigned specimens and the access cavities were restored with resin composite restorations. Fracture resistance test was conducted, and fracture mode was performed. One-way ANOVA used for fracture load data. Tukey’s post-hoc statistical test was performed for pair-wise comparison. Results: significantly highest fracture strength was recorded for Group A. Insignificantly fracture strength was found between Group B and C. Conclusions: fracture resistance of root canal treated teeth is adversely affected by fiber posts insertion. The conservation of the remaining sound tooth structure in root canal treated teeth present the ultimate goal to maintain their physical and mechanical properties