Rotational Alignment of the Femoral Component in Computer-Assisted Total Knee Arthroplasty

This study compared two Computer Assisted Surgery (CAS) methods in 212 total knee arthroplasties to evaluate the differences between  anatomic landmark axes in determining rotational position of the femoral component. Overall, there were large variations between CAS defined component orientation usi...

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Main Authors: Mark Clatworthy, MD, Kimberly Lindberg, MD, Walter Wray III, MD, Christi Sychterz Terefenko, MS, Douglas Dennis, MD, David Pollock, MD
Format: Article
Language:English
Published: Joint Implant Surgery & Research Foundation 2012-08-01
Series:Reconstructive Review
Online Access:https://reconstructivereview.org/ojs/index.php/rr/article/view/14
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spelling doaj-07dd546d510b4ab9a251a38b7734f7722020-11-25T01:44:45ZengJoint Implant Surgery & Research FoundationReconstructive Review2331-22622331-22702012-08-012110.15438/rr.v2i2.14Rotational Alignment of the Femoral Component in Computer-Assisted Total Knee ArthroplastyMark Clatworthy, MDKimberly Lindberg, MDWalter Wray III, MDChristi Sychterz Terefenko, MSDouglas Dennis, MDDavid Pollock, MDThis study compared two Computer Assisted Surgery (CAS) methods in 212 total knee arthroplasties to evaluate the differences between  anatomic landmark axes in determining rotational position of the femoral component. Overall, there were large variations between CAS defined component orientation using an optimized gap-balancing technique and component orientation using anatomic reference axes (range, 16º internal rotation to 16º external rotation). If based on anatomic landmarks, these large variations would have led to asymmetrical flexion gaps in up to 60% of the knees studied. Of the anatomic axes studied, the posterior condylar axis was the only axis not significantly different from CAS optimized orientation. If anatomic landmarks are used for femoral component rotation with either a conventional or a CAS technique, asymmetric trapezoidal flexion gaps may result. Key Words: total knee arthroplasty, balancing, component rotation, Computer Assisted Surgery https://reconstructivereview.org/ojs/index.php/rr/article/view/14
collection DOAJ
language English
format Article
sources DOAJ
author Mark Clatworthy, MD
Kimberly Lindberg, MD
Walter Wray III, MD
Christi Sychterz Terefenko, MS
Douglas Dennis, MD
David Pollock, MD
spellingShingle Mark Clatworthy, MD
Kimberly Lindberg, MD
Walter Wray III, MD
Christi Sychterz Terefenko, MS
Douglas Dennis, MD
David Pollock, MD
Rotational Alignment of the Femoral Component in Computer-Assisted Total Knee Arthroplasty
Reconstructive Review
author_facet Mark Clatworthy, MD
Kimberly Lindberg, MD
Walter Wray III, MD
Christi Sychterz Terefenko, MS
Douglas Dennis, MD
David Pollock, MD
author_sort Mark Clatworthy, MD
title Rotational Alignment of the Femoral Component in Computer-Assisted Total Knee Arthroplasty
title_short Rotational Alignment of the Femoral Component in Computer-Assisted Total Knee Arthroplasty
title_full Rotational Alignment of the Femoral Component in Computer-Assisted Total Knee Arthroplasty
title_fullStr Rotational Alignment of the Femoral Component in Computer-Assisted Total Knee Arthroplasty
title_full_unstemmed Rotational Alignment of the Femoral Component in Computer-Assisted Total Knee Arthroplasty
title_sort rotational alignment of the femoral component in computer-assisted total knee arthroplasty
publisher Joint Implant Surgery & Research Foundation
series Reconstructive Review
issn 2331-2262
2331-2270
publishDate 2012-08-01
description This study compared two Computer Assisted Surgery (CAS) methods in 212 total knee arthroplasties to evaluate the differences between  anatomic landmark axes in determining rotational position of the femoral component. Overall, there were large variations between CAS defined component orientation using an optimized gap-balancing technique and component orientation using anatomic reference axes (range, 16º internal rotation to 16º external rotation). If based on anatomic landmarks, these large variations would have led to asymmetrical flexion gaps in up to 60% of the knees studied. Of the anatomic axes studied, the posterior condylar axis was the only axis not significantly different from CAS optimized orientation. If anatomic landmarks are used for femoral component rotation with either a conventional or a CAS technique, asymmetric trapezoidal flexion gaps may result. Key Words: total knee arthroplasty, balancing, component rotation, Computer Assisted Surgery
url https://reconstructivereview.org/ojs/index.php/rr/article/view/14
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AT kimberlylindbergmd rotationalalignmentofthefemoralcomponentincomputerassistedtotalkneearthroplasty
AT walterwrayiiimd rotationalalignmentofthefemoralcomponentincomputerassistedtotalkneearthroplasty
AT christisychterzterefenkoms rotationalalignmentofthefemoralcomponentincomputerassistedtotalkneearthroplasty
AT douglasdennismd rotationalalignmentofthefemoralcomponentincomputerassistedtotalkneearthroplasty
AT davidpollockmd rotationalalignmentofthefemoralcomponentincomputerassistedtotalkneearthroplasty
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