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Load fatigue performance of two implant-abutment combinations
C H Basten1, J I Nicholls, C H Daly
1Department of Restorative Dentistry, University of Washington, School of Dentistry, Seattle, USA.
Summary
The CeraOne implant system showed poor load fatigue performance, with 10 of 15 failures, unlike the EsthetiCone system. Torque variations did not significantly impact fatigue failure rates for either implant system.
Area of Science:
- Biomaterials science
- Dental implantology
- Mechanical engineering
Background:
- Dental implant systems require robust fatigue performance to withstand occlusal loads.
- Evaluating the long-term durability of different implant designs under cyclic loading is crucial for clinical success.
Purpose of the Study:
- To compare the load fatigue performance of the CeraOne and EsthetiCone implant systems.
- To assess the influence of varying screw tightening torques on implant fatigue life.
Main Methods:
- A rotating-beam fatigue model was employed to simulate chewing forces.
- Specimens were subjected to a 70-N load at a 30-degree angle to the long axis.
- Three torque levels were applied: standard, standard + 20%, and standard -20%.
Main Results:
- No statistically significant difference in fatigue performance was observed across the three torque levels within each implant system.
- A statistically significant difference in load fatigue performance was found between the CeraOne and EsthetiCone systems.
- Implant failure occurred in 10 out of 15 CeraOne specimens, while the EsthetiCone system experienced only abutment screw failures.
Conclusions:
- The CeraOne implant system demonstrated inferior load fatigue performance compared to the EsthetiCone system.
- Screw tightening torque did not emerge as a significant factor influencing fatigue failure in this study.
- Clinical implications suggest potential material or design limitations in the CeraOne system under fatigue loading.