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Tendon transfers for restoring hand intrinsic muscle function: a biomechanical study
1Division of Orthopedic Surgery, University of Alabama at Birmingham, 35233, USA.
The Journal of Hand Surgery
|June 5, 1999
Summary
A volar carpal canal route for tendon transfer is more mechanically efficient than a dorsal route. Lateral band insertion significantly improves finger joint extension, aiding in functional restoration after injury.
Area of Science:
- Orthopedic surgery
- Biomechanics
- Hand surgery
Background:
- Tendon transfer is crucial for restoring hand function after injury.
- Optimizing the surgical technique is essential for successful outcomes.
Purpose of the Study:
- To biomechanically evaluate the impact of tendon transfer route (dorsal vs. volar) and insertion site on joint motion.
- To determine the most effective methods for restoring metacarpophalangeal joint flexion and interphalangeal joint extension.
Main Methods:
- Biomechanical testing of four fresh-frozen human arms.
- Comparison of dorsal and volar carpal canal routes for tendon transfer.
- Assessment of various digital tendon insertion sites: A1 pulley, A2 pulley, proximal phalanx, and lateral band/extensor mechanism.
Main Results:
- The volar carpal canal route demonstrated greater mechanical efficiency compared to the dorsal intermetacarpal route.
- Insertion into the lateral band/extensor mechanism resulted in a significant improvement in proximal and distal interphalangeal joint extension.
Conclusions:
- Volar tendon transfer routes offer superior mechanical efficiency.
- Lateral band insertion is a key factor in enhancing finger joint extension, improving functional restoration in hand surgery.