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Kirschner wire fixations for scapholunate dissociation: a cadaveric, biomechanical study
Michael G Jakubietz1, Robert Zahn, Joerg G Gruenert
1Department of Trauma, Hand, Plastic and Reconstructive Surgery, Julius Maximilian University Wuerzburg, Wuerzburg, Germany. jakubietz_m@klinik.uni-wuerzburg.de
Journal of Orthopaedic Surgery (Hong Kong)
|August 31, 2012
Summary
Scapholunate (SL) ligament fixation using SL-SC Kirschner wire techniques demonstrated superior strength compared to single-wire SL fixation. This method offers adequate stabilization of carpal rows with minimal impairment.
Area of Science:
- Orthopedic biomechanics
- Surgical fixation techniques
- Wrist anatomy and injury
Background:
- Scapholunate (SL) dissociation is a common wrist instability.
- Effective Kirschner wire fixation is crucial for carpal stability.
- Understanding the biomechanical properties of different fixation methods is essential.
Purpose of the Study:
- To compare the failure loads of five distinct Kirschner wire fixation techniques.
- To evaluate their efficacy in preventing scapholunate dissociation.
- To determine optimal fixation strategies for carpal stability.
Main Methods:
- A cadaveric biomechanical study using 10 fresh-frozen wrist specimens.
- Sectioned SL ligaments were subjected to axial loading.
- Comparison of five Kirschner wire fixation techniques (1.4-mm wires).
- Measurement of SL angle, dissociation, and load to failure.
Main Results:
- No significant difference in failure load between one or two-wire SL fixations.
- SL-SC fixation showed significantly greater force to cause SL dissociation compared to single-wire SL fixation (p=0.003).
- SL-SC-CL fixation was not significantly stronger than SL-SC fixation.
Conclusions:
- SL-SC Kirschner wire fixation provides adequate stabilization for both carpal rows.
- This technique achieves stability with minimal biological impairment.
- SL-SC fixation represents an effective method for managing SL dissociation.
