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Evaluation of resilient abutment components on measured strain using dynamic loading conditions
D Morton1, C M Stanford, S A Aquilino
1Department of Prosthodontics, College of Dentistry, University of Florida, Gainesville, USA.
The Journal of Prosthetic Dentistry
|July 10, 1998
Summary
This study validated a human cadaver bone model for measuring implant strain. Polyoxymethylene abutments did not alter bone strain compared to titanium, suggesting a viable in vitro model for implant research.
Area of Science:
- Biomaterials Science
- Orthopedic Biomechanics
- Implantology
Background:
- Implant success depends on factors influencing strain transmission from prostheses to bone.
- Current in vitro models lack clinical relevance for evaluating bone strain.
- A validated human cadaver model is needed for accurate in vitro strain assessment.
Purpose of the Study:
- Validate a human cadaver bone model for in vitro cortical bone strain measurement.
- Evaluate the impact of a resilient plastic component (polyoxymethylene) in titanium implants on cortical strain under dynamic loading.
Main Methods:
- Utilized human cadaver ulna bone with two IMZ implants.
- Measured cortical bone strain using biaxial rosette strain gauges.
- Applied dynamic loads to prosthetic frameworks with titanium or polyoxymethylene abutments.
Main Results:
- Recorded cortical strains aligned with physiological ranges for bone remodeling.
- Polyoxymethylene abutments did not reduce peak microstrain compared to titanium.
- Polyoxymethylene abutments increased loading cycle time.
Conclusions:
- The human cadaver bone model is a viable in vitro tool for elastic strain evaluation.
- Polyoxymethylene abutments do not significantly alter measurable bone strain under tested dynamic loading conditions.
- This model aids in understanding implant biomechanics and material effects on bone.