Abstract |
Malalignment may contribute to early prosthesis failure through point loading and premature polyethylene wear. Femoral resection requires for distal planar resection contingent upon correct rotation and coronal alignment. Using a standard model, we have examined the influence of differing femoral entry points and rotations upon final femoral component positioning. A graphical method and navigation system independently quantified the individual and combined impact of these variables, in 3 planes. Nine permutations were assessed with reference to neutral rotation and a central entry point. The graphical results were corroborated by the navigation analyses. We found that external rotation and a superolateral entry point introduced the greatest error in final component positioning. We have identified a safe envelope for femoral rod positioning and recommend that the rotational alignment is determined before distal bone resection.
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Authors | Rajkumar Gangadharan, David J Deehan, Andrew W McCaskie |
Journal | The Knee
(Knee)
Vol. 17
Issue 5
Pg. 345-9
(Oct 2010)
ISSN: 1873-5800 [Electronic] Netherlands |
PMID | 19875296
(Publication Type: Journal Article)
|
Copyright | Copyright 2009 Elsevier B.V. All rights reserved. |
Topics |
- Arthrometry, Articular
- Arthroplasty, Replacement, Knee
(methods)
- Biomechanical Phenomena
- Computer Simulation
- Femur
(surgery)
- Humans
- Knee Prosthesis
- Models, Anatomic
- Prosthesis Design
- Prosthesis Failure
- Rotation
- Surgery, Computer-Assisted
(methods)
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