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Comparison of fatigue for three prefabricated threaded post systems
F H Kahn1, P A Rosenberg, A Schulman
1Department of Endodontics, New York University, College of Dentistry, New York, USA.
The Journal of Prosthetic Dentistry
|February 1, 1996
Summary
This study found no significant difference in fracture resistance among three prefabricated threaded post systems used in endodontically treated teeth. The post design did not statistically impact the lateral shearing forces causing tooth fracture.
Area of Science:
- Dental Materials Science
- Endodontics
- Biomaterials Engineering
Background:
- Post designs significantly influence the fracture resistance of endodontically treated teeth.
- Evaluating prefabricated threaded post systems is crucial for clinical success.
Purpose of the Study:
- To compare the fracture resistance of three prefabricated threaded post systems under lateral shearing forces.
- To assess the impact of different post designs on the mechanical integrity of endodontically treated teeth.
Main Methods:
- Extracted human teeth underwent endodontic treatment and received prefabricated threaded posts.
- Teeth were restored with silver amalgam cores, cast restorations, and thermocycled.
- A universal testing machine applied lateral shearing forces until failure, with fracture patterns analyzed.
Main Results:
- No statistically significant differences were observed in fracture resistance among the three tested threaded post systems.
- Fracture patterns and compressive stresses varied, but not to a statistically significant degree between groups.
Conclusions:
- The choice among the evaluated prefabricated threaded post systems did not significantly affect fracture resistance in this in vitro study.
- Further research may be needed to explore other factors influencing the mechanical performance of posts in endodontically treated teeth.