Abstract
Introduction: This study compared the fracture resistance and fracture pattern of endodontically treated teeth restored with three different post systems. Materials and Methods: In this in vitro study, 30 extracted single-root human premolars with oval-shaped canals were selected. All teeth were endodontically treated and sectioned horizontally from the cement-enamel junction. Samples were randomly assigned into three groups; group 1- casting post cemented with glass-ionomer, group 2- pre-fabricated post cemented with glass-ionomer, and group 3- pre-fabricated post cemented with glass-ionomer and modified with amalgam. Fracture resistance (Newton) was measured under load on the universal load test machine. The fracture pattern was also recorded as restorable and unrestorable. The data was analyzed using SPSS version 24. ANOVA and post hoc (Tukey) were applied at the significance level of 0.05. Results: Mean fracture resistance was 999.2±278.21 (N), 501.6±246.74 (N), and 600.23±254.04 (N) in groups 1, 2, and 3, respectively. There was no statistically significant difference in fracture resistance between groups 2 and 3. However, the fracture resistance of group 1 was significantly higher than groups 2 and 3. 100% of the failure pattern in group 1 was unrestorable. 60% and 80% of failure patterns in groups 2 and 3 were restorable, respectively. Conclusion: Fracture resistance was higher for casting posts than for pre-fabricated posts; however, the fracture resistance of all three groups was acceptable. Using pre-fabricated posts decrease root fracture compared to casting posts. Modifying pre-fabricated posts with amalgam may minimize the occurrence of unrestorable fractures and root fracture.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call