View clinical trials related to Knee Prosthesis.
Filter by:The objectives of this study are four-fold: 1. To determine the three-dimensional, in vivo kinematics for subjects having either a fixed- or mobile-bearing Press Fit Condylar (PFC) Sigma Total Condylar III Prosthesis, comparing the in vivo kinematics to determine if one implant type leads to a benefit for the patient. 2. To determine if bearing mobility occurs in PFC Sigma Rotating Platform Total Condylar III Prosthesis under in vivo, weight-bearing conditions during multiple activities (gait, stair descent, deep knee bend and chair rise). 3. To determine if there is a correlation between in vivo kinematic data obtained using fluoroscopy, electromyography (EMG) and ground reaction force (GRF) data and determine if variability occurs between these two TKA types. 4. To determine if a clinical benefit is either visibly detected (video camera) or quantifiably determined (questionnaire) for either TKA type.
This study will analyze the tibio-femoral and patellofemoral (motion) and mechanics (forces) of participants having a normal knee or a total knee arthroplasty (TKA) using one or two different (TKA) devices Low Contract Stress (LCS) Posterior Stabilizing (PS) Rotating Platform (RP) Total Knee Arthroplasty (TKA). All knees will be analyzed using an image matching technique that will convert a two-dimensional (2D) fluoroscopic image into a three-dimensional (3D) image. In conjunction with the fluoroscopic analysis, electromyography (EMG) data, and ground reaction force (GRF) data will all be allow for a complete analysis of the knee joints. These results will help the orthopaedic community better understand knee motion so they can improve testing on existing implants and develop future implants that will further enhance patients' lives.