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The design and development of a finger joint simulator
1School of Mechanical and Systems Engineering, Newcastle University, Newcastle upon Tyne, UK Thomas.joyce@ncl.ac.uk.
Summary
Artificial finger joint prostheses often fail due to disease and biomechanical challenges. This study details a new finger joint simulator designed to improve pre-clinical testing and predict clinical failures.
Area of Science:
- Biomedical Engineering
- Orthopedic Surgery
- Materials Science
Background:
- Artificial finger joints have a history of clinical failure, unlike hip and knee replacements.
- Rheumatoid arthritis complicates finger joint replacement by affecting surrounding tissues and altering natural biomechanics.
- Existing finger joint prostheses face challenges from disease progression and subluxing forces, leading to high failure rates.
Purpose of the Study:
- To describe the design and development of a novel finger joint simulator at Durham University.
- To justify the engineering decisions and evolution of the finger simulator.
- To demonstrate the simulator's effectiveness in predicting clinical-type failures through in vitro testing.
Main Methods:
- Development of a specialized finger joint simulator at Durham University.
- Engineering analysis to justify design choices and simulator evolution.
- In vitro testing of finger prostheses using the developed simulator.
Main Results:
- The developed finger simulator successfully linked in vitro test results to clinical-type failures.
- The simulator's design evolution was guided by the need to replicate complex biomechanical conditions.
- Engineering justifications support the simulator's capability to identify potential prosthesis failures.
Conclusions:
- There is a continued need for effective in vitro testing methods for finger joint prostheses.
- The Durham University finger simulator shows promise in improving the pre-clinical evaluation of artificial finger joints.
- Appropriate in vitro testing is crucial to reduce the incidence of in vivo finger implant failures.
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