| Accuracy of single-plane fluoroscopy in determining relative position and orientation of total knee replacement components. | |
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MedLine Citation:
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PMID: 21092967 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The accuracy of estimating the relative pose between knee replacement components, in terms of clinical motion, is important in the study of knee joint kinematics. The objective of this study was to determine the accuracy of the single-plane fluoroscopy method in calculating the relative pose between the femoral component and the tibial component, along knee motion axes, while the components were in motion relative to one another. The kinematics of total knee replacement components were determined in vitro using two simultaneous methods: single-plane fluoroscopic shape matching and an optoelectronic motion tracking system. The largest mean differences in relative pose between the two methods for any testing condition were 2.1°, 0.3°, and 1.1° in extension, abduction, and internal rotation respectively, and 1.3, 0.9, and 1.9mm in anterior, distal, and lateral translations, respectively. For the optimized position of the components during dynamic trials, the limits of agreement, between which 95% of differences can be expected to fall, were -2.9 to 4.5° in flexion, -0.9 to 1.5° in abduction, -2.4 to 2.1° in external rotation, -2.0 to 3.9mm in anterior-posterior translation, -2.2 to 0.4mm in distal-proximal translation and -7.2 to 8.6mm in medial-lateral translation. These mean accuracy values and limits of agreement can be used to determine whether the shape-matching approach using single-plane fluoroscopic images is sufficiently accurate for an intended motion tracking application. |
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Authors:
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Stacey Acker; Rebecca Li; Heather Murray; Paul St John; Scott Banks; Shang Mu; Urs Wyss; Kevin Deluzio |
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Publication Detail:
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Type: Journal Article Date: 2010-11-18 |
Journal Detail:
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Title: Journal of biomechanics Volume: 44 ISSN: 1873-2380 ISO Abbreviation: J Biomech Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-02-21 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0157375 Medline TA: J Biomech Country: United States |
Other Details:
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Languages: eng Pagination: 784-7 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier Ltd. All rights reserved. |
Affiliation:
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Department of Mechanical and Materials Engineering, Queen's University, Kingston, Ontario, Canada K7L 3N6. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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