Propiedades estruturales de la reconstrucción de ligamento colateral lateral…

"Propiedades estruturales de la reconstrucción de ligamento colateral lateral de la cabeza del peroné."

William J. Ciccone, II, MD, Derek R. Bratton, David M. Weinstein, MD, David L. Walden, MD and John J. Elias, PhD*

From the Medical Education and Research Institute of Colorado, Colorado Springs, Colorado

Background: Anatomical reconstruction of a ruptured lateral collateral ligament using allograft tissue secured within the fibular head with an interference screw has been described.

Hypothesis: Interference fixation at the fibular head does not reproduce the strength of the intact ligament.

Study Design: Controlled laboratory study.

Methods: Ten intact lateral collateral ligaments were tested to failure. The distal fixation of 11 ligaments reconstructed with a graft including a bone plug and 11 ligaments reconstructed with a graft without a bone plug were also tested.

Results: The reconstructed ligaments consistently failed at the fibular head. The intact specimens predominately failed through ligament rupture. The mean strength and stiffness values were 460 ± 163 N and 82 ± 25 N/mm, respectively, for the intact ligaments, 113 ± 40 N and 36 ± 10 N/mm, respectively, for reconstruction with a bone plug, and 135 ± 81 N and 34 ± 14 N/mm, respectively, for reconstruction without a bone plug. The strength and stiffness were significantly (P < .05) greater for the intact ligaments than for either reconstruction group. The variation in strength was significantly larger for reconstruction without a bone plug than for reconstruction with a bone plug.

Conclusion: Tension applied to lateral collateral ligaments reconstructed using fibular interference fixation should be limited immediately after surgery. Soft tissue fixation should be employed with care because of the inconsistency in the failure strength.

First published on September 16, 2005, doi:10.1177/0363546505278704.