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Wrist tendon forces during various dynamic wrist motions
Frederick W Werner1, Walter H Short, Andrew K Palmer
1Department of Orthopedic Surgery, SUNY Upstate Medical University, Syracuse, NY 13210, USA. wernerf@upstate.edu
The Journal of Hand Surgery
|April 1, 2010
Summary
Harvesting the flexor carpi radialis tendon (FCR) for thumb arthritis surgery may reduce wrist strength. However, the dart-throwing motion places minimal force on the remaining FCR, potentially preserving function.
Area of Science:
- Orthopedic surgery
- Biomechanics
- Hand and wrist anatomy
Background:
- Carpometacarpal joint arthritis often necessitates flexor carpi radialis (FCR) tendon grafting.
- Understanding tendon force dynamics is crucial for surgical outcomes.
Purpose of the Study:
- To investigate in vitro tendon forces of wrist flexors and extensors.
- To determine how dynamic wrist motions affect tendon force contribution, specifically for the FCR.
Main Methods:
- Tested 62 fresh-frozen cadaver wrists using a wrist motion simulator.
- Measured peak and average tendon forces during flexion-extension, radioulnar deviation, dart throwing, and circumduction.
Main Results:
- Flexor carpi radialis (FCR) forces were significantly lower during dart-throwing motion compared to other motions.
- Flexor carpi ulnaris forces were significantly higher during dart-throwing motion.
Conclusions:
- FCR tendon harvesting can lead to decreased wrist strength.
- The dart-throwing motion is least likely to be impacted by FCR harvesting due to minimized force on the remaining tendon.
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