Fracture resistance of endodontically treated teeth restored with CAD‐CAM milled and prefabricated post‐and‐core systems
Betül Hamitoglu, Zeynep Ozkurt‐KayahanAbstract
Purpose
To compare the effect of post‐and‐core material type and production technique on the fracture resistance of teeth.
Materials and Methods
Sixty human maxillary central incisors were used for the study. Root canal treatments were performed, and the post cavities were created. The teeth were divided into six groups (n = 10) according to post material and production method: prefabricated glass‐fiber post (PF), zirconia post (PZ), titanium post (PT), and CAD‐CAM produced glass‐fiber post (CF), zirconia post (CZ), titanium post (CT). All post‐and‐core restorations were luted with resin cement (RelyX U200). Static loading was applied on the luted metal copings using a universal testing machine to measure fracture resistance. The effect of material and production method on fracture resistance was evaluated with two‐way ANOVA test. Tukey HSD test was used in post hoc analyses. Significance was evaluated at p < 0.05 level.
Results
In the CAD‐CAM post‐and‐cores, the fracture resistance of zirconia was significantly higher (809 N) than titanium (569 N) and glass‐fiber (342 N). In the prefabricated posts, the fracture resistance of zirconia was significantly higher than glass‐fiber (445 N), while there was no significant difference between zirconia (605 N) and titanium (538 N) materials.
Conclusion
Zirconia posts demonstrated the highest and CAD‐CAM glass‐fiber posts demonstrated the lowest fracture resistance compared to other types of post materials. Additional studies are needed to confirm if CAD‐CAM glass‐fiber posts may be considered an effective alternative treatment.