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Generating Differential Ligamentotaxis Across the Radiocarpal Joint
Gregory K Faucher1, Brent G Parks1, Neal B Zimmerman1
1The Curtis National Hand Center, Baltimore, Maryland.
Journal of Surgical Orthopaedic Advances
|August 15, 2019
Summary
Traction on the index finger metacarpal selectively stresses the radial column of the distal radius. Conversely, long finger traction selectively loads the ulnar column, offering targeted force application in orthopedic surgery.
Area of Science:
- Orthopedic Surgery
- Biomechanics
- Hand Surgery
Background:
- Distal radius fractures are common, impacting the radial and ulnar columns.
- Understanding force transmission is crucial for effective fracture fixation and surgical planning.
Purpose of the Study:
- To investigate whether index or long finger metacarpal traction selectively distracts the radial or ulnar column of the distal radius.
- To determine the relationship between applied traction force and transmitted force in each column.
Main Methods:
- Eight human cadaveric upper extremity specimens were used.
- The distal radius was osteotomized, and plates were applied to the index and long finger metacarpals.
- Progressive traction forces (4.5N to 89N) were applied sequentially to each metacarpal.
Main Results:
- Index finger metacarpal traction significantly increased distraction force in the radial column.
- Long finger metacarpal traction significantly increased distraction force in the ulnar column.
- Force transmission increased linearly with increasing applied load in both columns.
Conclusions:
- Selective traction applied to the index or long finger metacarpal can differentially load the radial or ulnar columns of the distal radius.
- This finding has implications for surgical techniques aiming for precise force application in distal radius fracture management.
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