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The scapholunate allograft: a biomechanical feasibility study
M Coe1, P Spitellie, T E Trumble
1Department of Orthopedics, Harborview Medical Center, University of Washington, Seattle 98104, USA.
The Journal of Hand Surgery
|July 1, 1995
Summary
This study biomechanically assessed a new scapholunate allograft reconstruction for isolated scapholunate ligament tears. Results indicate no significant differences in wrist biomechanics compared to intact wrists, suggesting feasibility.
Area of Science:
- Orthopedic Surgery
- Biomechanics
- Hand and Wrist Anatomy
Background:
- Scapholunate ligament tears are common wrist injuries.
- Current reconstruction methods have limitations.
- Allograft reconstruction offers a potential alternative.
Purpose of the Study:
- To biomechanically evaluate the feasibility of a novel scapholunate allograft reconstruction technique.
- To compare wrist biomechanics after allograft reconstruction to intact wrists.
Main Methods:
- A fresh cadaver upper extremity model was used.
- Seven specimens underwent testing for range of motion, radiocarpal contact, and scaphoid-lunate motion.
- A scapholunate allograft was harvested, prepared, and implanted.
- Allografted wrists were re-tested using identical protocols.
Main Results:
- No significant differences were observed in wrist range of motion.
- Radiocarpal articular surface contact area and pressure remained comparable.
- Relative scaphoid-lunate flexion-extension rotation showed no significant changes.
Conclusions:
- The tested scapholunate allograft reconstruction method demonstrates biomechanical feasibility.
- This technique may restore native wrist joint function after isolated scapholunate ligament tears.