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

• 作者: Alexandre Terrier Aurélien Gallice Brigitte M. Jolles Claus L?cherbach Jean-Damien Nicodeme
• 来源期刊: 矫形学期刊(英文)
• 学科: 医学
• 关键词: DISLOCATION FEMORAL Nerve Block MOBILE Bearing PROSTHESIS Muscle SPASM Total Knee ARTHROPLASTY
• 年，卷（期）: 2013,（2）
• 页码范围: 69-73
• 页数: 5页
• 分类号: R6

摘要

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.