The Journal of Bone and Joint Surgery (American) 85:64-72 (2003)
© 2003 The Journal of Bone and Joint Surgery, Inc.
Making Sense of Knee Arthroplasty Kinematics: News You Can Use
Scott A. Banks, PHD,
M.K. Harman, MSC,
J. Bellemans, MD, PHD and
W.A. Hodge, MD
Corresponding author: Scott A. Banks, PhD The Biomotion Foundation, 1411
North Flagler Drive, Suite 9800, West Palm Beach, FL 33401. E-mail address:
banks@alum.mit.edu
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Many groups are reporting results of in vivo studies of knee replacement
motions. Despite this growing abundance of data, it may be difficult for the
practicing orthopaedist to glean usable information from these highly
technical studies. This paper summarizes key study findings related to implant
design and surgical strategy. A number of important issues are explored:
surgical technique, range of motion, patterns of knee motion, polyethylene
wear, and functional knee
strength. ,
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Fig 1: Knee prostheses with a flat tibial insert and a femoral component with a
large distal radius can exhibit posterior femoral translation with knee
flexion1. However,
achieving this pattern of motion appears to depend on surgical technique. Many
knee replacements with the same or similar designs exhibit different patterns
of
motion2-9.
(Reprinted, with permission, from: Nozaki H, Banks SA, Suguro T, Hodge WA.
Observations of femoral rollback in cruciate-retaining knee arthroplasty. Clin
Orthop. 2002;404:310.)
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