A multiple-bundle model to characterize the mechanical behavior of the cruciate ligaments

The Knee
Shahram AmiriUrs P Wyss

Abstract

Measurements of elongations of the cruciate ligaments have been used to study the behaviors of these ligaments in-vitro and in-vivo, mostly based on simplified two-bundle models of the cruciates. The complex fiber anatomy of the cruciates may suggest a complex deformation behavior across the continuum of their substance that cannot be captured by only two measurement points. In this study, a new methodology was introduced to include more detailed fiber anatomy and to take into consideration the wrapping of the PCL around the intercondylar notch of the femur in deep flexion. The method was used in comparison to the conventional two-bundle models on three sample cadaver knees that underwent a passive flexion up to 150°. The elongation ratios of the bundles were measured as the ratio of change in the length of the bundles over their lengths at 0° flexion. The multiple-bundle models showed ranges of variations across the attachment sites of the cruciates which at all flexion angles were significantly larger than those observed from the conventional two-bundle models. When expressed in percentages, at 150° flexion the ranges of variations in the elongation ratio of the bundles were 32.7%±31.9% and 34%±8.6% for the ACL and PCL, respe...Continue Reading

References

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Citations

Jan 27, 2012·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Andrew A Amis
Jul 19, 2012·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Jingxian ZhuYingfang Ao
Oct 20, 2012·Computational and Mathematical Methods in Medicine·Shahram Amiri, David R Wilson
Sep 23, 2014·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Ali HosseiniGuoan Li

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