Short-term performance of Motec wrist implants
Author Information
Author(s): Joyce Thomas J., Kandemir Göksu, Warwick David, Brown Daniel J.
Primary Institution: School of Engineering, Newcastle University
Hypothesis
What is the in vivo performance of metal-on-carbon fibre reinforced poly ether ether ketone Motec wrist implants after short-term use?
Conclusion
The study found no major damage on the articulating surfaces of the explanted Motec wrist implants, with some showing signs of self-polishing.
Supporting Evidence
- Five of the seven explanted metal heads showed a statistically significant decrease in roughness compared to a new sample.
- Three of the seven explanted CFR-PEEK cups showed a statistically significant decrease in roughness compared to a new sample.
- Two of the seven explanted radial cups showed rim damage, presumably due to impingement.
Takeaway
Doctors looked at some wrist implants after they were taken out and found they were mostly in good shape, with some parts getting smoother over time.
Methodology
The study involved explant analysis of seven Motec Mo-CFR-PEEK wrist implants removed during revision surgery, with surface measurements taken and compared to a new sample.
Potential Biases
The majority of surgeries were performed by other centers, limiting the ability to calculate early revision rates.
Limitations
Volumetric wear of the prostheses was not measured, which is a challenge for such small components.
Participant Demographics
The mean age of participants was 61 years, with a range from 52 to 70 years.
Statistical Information
P-Value
p<0.05
Confidence Interval
95%
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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