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Fracture Resistance of Different Post-Core Systems: An In vitro Study
Srivalli Podili1, Rahul Puthenkandathil2, Manisha M Kulkarni3
1Department of Conservative Dentistry and Endodontics, Sree Sai Dental College and Research Institute, Srikakulam, Andhra Pradesh, India.
Journal of Pharmacy & Bioallied Sciences
|September 1, 2023
Summary
This study compared the fracture resistance of various post-core materials in endodontically treated teeth. Stainless steel posts with composite cores demonstrated the highest fracture resistance, emphasizing the need for tooth strengthening.
Area of Science:
- Dental Materials Science
- Endodontics
- Biomaterials Engineering
Background:
- Endodontic treatment failure can result from extensive restorations using multiple materials.
- The mechanical integrity of endodontically treated teeth often requires post-core stabilization.
- Understanding the fracture resistance of different post-core systems is crucial for long-term restoration success.
Purpose of the Study:
- To compare the fracture resistance of ceramic fiber posts, glass posts, and stainless steel posts, all with composite cores, in maxillary incisors.
- To evaluate the necessity of post-core placement for reinforcing endodontically treated teeth.
- To identify the optimal post-core material combination for enhanced fracture resistance.
Main Methods:
- Forty maxillary incisors undergoing root canal therapy were divided into four groups (n=10).
- Three experimental groups received ceramic fiber, glass, or stainless steel posts with composite cores using adhesive resin cement.
- A control group had no post-core. Fracture resistance was tested using a universal testing machine at a 130° angle until fracture.
- Data were analyzed using analysis of variance (ANOVA), with P < 0.05 considered significant.
Main Results:
- Significant differences in fracture resistance were observed among all groups (P < 0.05).
- Teeth without post-cores exhibited the least fracture resistance, confirming the need for reinforcement.
- Stainless steel posts with composite cores demonstrated the highest fracture resistance among the tested materials.
- Glass posts offered good restorability and aesthetic acceptability.
Conclusions:
- Post-core stabilization is essential for enhancing the fracture resistance of endodontically treated teeth.
- Stainless steel posts combined with composite cores provide superior mechanical strength compared to ceramic fiber and glass posts.
- The choice of post-core material significantly impacts the structural integrity and longevity of dental restorations.
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