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Implant superstructures: a comparison of ultimate failure force
E A McGlumphy1, D M Robinson, D A Mendel
1Ohio State University College of Dentistry.
The International Journal of Oral & Maxillofacial Implants
|January 1, 1992
Summary
This study tested dental implant abutment and screw strength, finding significant variation. Results reveal failure forces between 1.22 and 17.23 kg, highlighting the need for careful material selection in prosthodontics.
Area of Science:
- Biomaterials Science
- Dental Implantology
- Mechanical Engineering
Background:
- Prosthodontic failures have led to the development of alternative implant abutments and screws.
- Claims of superior strength for new components lack sufficient quantitative data.
- Understanding the mechanical performance of implant components is crucial for long-term success.
Purpose of the Study:
- To quantitatively compare the failure forces of commonly used dental implant abutment and screw combinations.
- To provide empirical data supporting or refuting claims of enhanced strength in alternative components.
- To identify potential weak points in current implant-supported prosthodontic systems.
Main Methods:
- Mechanical testing of five common implant and abutment systems.
- Construction of an 18-mm cantilever test prosthesis for each system.
- Loading specimens to failure using an MTS machine (n=5 per sample).
Main Results:
- Mean failure forces varied substantially across tested systems, ranging from 1.22 kg to 17.23 kg.
- Specific failure force and location were recorded for each tested implant and abutment combination.
- Significant differences in mechanical resistance were observed between the systems.
Conclusions:
- The mechanical strength of dental implant abutment and screw systems differs significantly.
- Quantitative failure data are essential for selecting robust components in dental implant prosthodontics.
- Further research should focus on optimizing material and design for improved implant component longevity.