In biomechanical terms, passive joint laxity is a measure of joint movement within the constraints of ligaments, capsule, and cartilage [1] when an external force is applied to the joint during a state of muscular relaxation. Excessive knee joint laxity (reduced stiffness) can result from soft tissue injury, such as a ligament tear, or from genetic factors such as benign joint hypermobility syndrome, and can predispose the joint to instability including recurrent dislocations, and low-grade inflammatory arthritis [2]. A novel technique for in vivo measurement of 3D knee joint laxity using magnetic resonance (MR) imaging with a custom knee loading apparatus (KLA) has been developed in our research group [3]. Gross joint laxity is predicted based on joint displacement in response to an applied anterior tibial load. To better understand the link between laxity and instability, and to advance this technique for clinical applications, the laxity of individual joint structures, such as the anterior cruciate ligament (ACL) must be quantified.
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ASME 2011 Summer Bioengineering Conference
June 22–25, 2011
Farmington, Pennsylvania, USA
Conference Sponsors:
- Bioengineering Division
ISBN:
978-0-7918-5458-7
PROCEEDINGS PAPER
Quantification of In Vivo Laxity in the ACL and Individual Knee Joint Structures
Lindsey M. Westover,
Lindsey M. Westover
University of Calgary, Calgary, AB, Canada
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Jessica C. Küpper,
Jessica C. Küpper
University of Calgary, Calgary, AB, Canada
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Janet L. Ronsky
Janet L. Ronsky
University of Calgary, Calgary, AB, Canada
Search for other works by this author on:
Lindsey M. Westover
University of Calgary, Calgary, AB, Canada
Jessica C. Küpper
University of Calgary, Calgary, AB, Canada
Janet L. Ronsky
University of Calgary, Calgary, AB, Canada
Paper No:
SBC2011-53582, pp. 997-998; 2 pages
Published Online:
July 17, 2013
Citation
Westover, LM, Küpper, JC, & Ronsky, JL. "Quantification of In Vivo Laxity in the ACL and Individual Knee Joint Structures." Proceedings of the ASME 2011 Summer Bioengineering Conference. ASME 2011 Summer Bioengineering Conference, Parts A and B. Farmington, Pennsylvania, USA. June 22–25, 2011. pp. 997-998. ASME. https://doi.org/10.1115/SBC2011-53582
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