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Biomechanical comparison of medial collateral ligament reconstructions using computer-assisted navigation
Brian T Feeley1, Mark S Muller, Answorth A Allen
1Department of Orthopaedic Surgery, University of California, San Francisco, , 1701 Divisadero Street, Suite 240, San Francisco, CA 94115, USA. feeleyb@orthosurg.ucsf.edu
The American Journal of Sports Medicine
|March 13, 2009
Summary
Double-bundle medial collateral ligament reconstruction effectively restores knee stability against valgus stress. This technique provides superior valgus and external rotation control compared to single-bundle methods, improving outcomes for knee injuries.
Area of Science:
- Orthopedic Surgery
- Biomechanics
- Sports Medicine
Background:
- The medial collateral ligament (MCL) is crucial for stabilizing the knee against valgus stress.
- MCL injuries, particularly Grade III, can lead to significant knee instability.
Purpose of the Study:
- To compare the effectiveness of double-bundle versus single-bundle MCL reconstruction techniques.
- To evaluate the restoration of valgus and external rotation stability after MCL deficiency.
Main Methods:
- A controlled laboratory study using seven fresh-frozen cadaveric knees.
- Valgus opening and external rotation were measured under stress with intact, disrupted, and repaired MCLs.
- Four reconstruction techniques were tested: Bosworth, modified Bosworth, anatomical single bundle, and anatomical double bundle.
Main Results:
- Complete MCL sectioning significantly increased valgus opening and external rotation.
- Single-bundle techniques failed to restore native knee stability.
- Double-bundle techniques (modified Bosworth and anatomical double bundle) successfully restored valgus and external rotation stability to intact levels.
Conclusions:
- Double-bundle MCL reconstruction provides superior stability compared to single-bundle techniques.
- This technique may lead to better surgical outcomes for patients with MCL injuries requiring reconstruction.