Comparing in vivo kinematics of anterior cruciate-retaining and posterior cruciate-retaining total knee arthroplasty |
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| Authors: | Taka-aki Moro-oka Marc Muenchinger Jean-Pierre Canciani Scott A. Banks |
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| Affiliation: | (1) Department of Mechanical and Aerospace Engineering, University of Florida, P.O. Box 116250, Gainesville, FL 32611-6250, USA;(2) The BioMotion Foundation, West Palm Beach, FL, USA;(3) Seimeikai Moro-oka Orthopaedic Hospital, Fukuoka, Japan;(4) Zimmer GmbH, Winterthur, Switzerland;(5) CMC, Rennes, Volney, France |
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| Abstract: | The purpose of this study was to compare knee kinematics in patients with bi-cruciate preserving total knee arthroplasty and posterior cruciate ligament (PCL) preserving total knee arthroplasty. Five knees received PCL-retaining arthroplasty and nine knees received both cruciate-retaining arthroplasty (ACL/PCL knees). We studied treadmill gait, stair stepping, and maximum flexion activities using lateral fluoroscopy and shape matching. For maximum flexion, the ACL/PCL knees showed 6 mm more posterior translation of the lateral condyle (p < 0.05). For the stair activity, posterior translations of the lateral condyle were significantly greater in the ACL/PCL knees from 30° to 70° flexion (p < 0.05). Both condyles in the ACL/PCL knees showed greater posterior translation in the stance and swing phases of gait than in the PCL knees (p < 0.05). Preserving both cruciate ligaments in total knee arthroplasty appears to maintain some basic features of normal knee kinematics in these activities. |
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| Keywords: | Total knee arthroplasty Anterior cruciate ligament retaining Posterior cruciate ligament retaining Kinematics Fluoroscopy |
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