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Evaluation of impingement of the anterior tibial post during gait in a posteriorly-stabilised total knee replacement
- Article from:
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Journal of Bone and Joint Surgery
- Article date:
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September 1, 2008
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Copyright informationCopyright British Editorial Society of Bone & Joint Surgery Sep 2008. Provided by ProQuest LLC. (Hide copyright information)
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Mechanical failure because of wear or fracture of the polyethylene tibial post in posteriorly-stabilised total knee replacements has been extensively described. In this study of 12 patients with a clinically and radiologically successful NexGen LPS posteriorly-stabilised prosthesis impingement of the anterior tibial post was evaluated in vivo in three dimensions during gait using radiologically-based Image-matching techniques.
Impingement was observed in all images of the patients during the stance phase, although the NexGen LPS was designed to accommodate 14° of hyperextension of the component before impingement occurred. Impingement arises as a result of posterior translation of the ...