Comparison of fracture strengths of post-core systems produced using traditional methods and CAD/CAM in endodontically treated teeth

Abstract

Aim: The purpose of this study was to compare the fracture strengths of post systems used with CAD/CAM and traditional methods.

Methodology: A total of 30 maxillary central teeth were used in the study. After the root lengths were standardized to be 10 mm, post sockets were prepared in the root canals. A total of 30 teeth were randomly divided into three groups (n=10). The post sockets were measured with silicone and sent to the laboratory. Samples were prepared after laboratory procedures. PEEK posts, fiber posts, and zirconia posts were cemented to the post sockets with resin cement. The test samples were kept at room temperature for 24 hours and then subjected to thermal cycling. After thermal cycling, force was applied to the test samples at a speed of 1 mm/min until the sample fractured. Statistical analysis was performed using one-way ANOVA (p<0.05) in SPSS.

Results: The statistical analysis revealed a significant difference in mean fracture resistance among the groups (p<0.05). The highest mean fracture strength value in the tested groups was observed in the fiber post group (410.9 ± 106.2 N). The lowest mean was observed in the PEEK post group (215.1 ± 77.7).

Conclusion: All groups of PEEK, glass fiber, and zirconium oxide post-cores showed sufficient fracture strength when compared with the mean of the maximum forces that can be applied to the teeth in the anterior region.