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has been cited by the following article:

• TITLE: Mobile Bearing Plate Dislocation in Total Knee Arthroplasty Due to Muscle Spasm: A Case Report

  AUTHORS: Jean-Damien Nicodeme, Claus Löcherbach, Alexandre Terrier, Aurélien Gallice, Brigitte M. Jolles

  KEYWORDS: Dislocation; Femoral Nerve Block; Mobile Bearing Prosthesis; Muscle Spasm; Total Knee Arthroplasty

  JOURNAL NAME: Open Journal of Orthopedics, Vol.3 No.2, June 6, 2013

  ABSTRACT: An unusual case of early dislocation of a mobile bearing posterior stabilized total knee arthroplasty in a 48-year-old Caucasian woman is described. Dislocation occurred one day postoperatively, attributed to a gap mismatch. Revision surgery reduced posterior dislocation, increased bearing plate thickness and rebalanced ligaments. A second dislocation occurred after revision surgery. The patient’s history was retaken and a hamstring spasm disease identified. A new revision utilized a more constrained design, without perioperative local nerve block. Two years following surgery, no further dislocation had occurred. A numerical musculoskeletal model of the case and implant configuration identified no trend to mobile bearing dislocation when regular muscle forces were applied. Muscle spasm is a risk factor for mobile bearing total knee arthroplasty dislocation, especially with femoral nerve block.