Kinematic Analysis of a Posterior-stabilized Knee Prosthesis

Kinematic analysis of a posterior-stabilized knee prosthesis.

BACKGROUND The goal of total knee arthroplasty (TKA) is to restore knee kinematics. Knee prosthesis design plays a very important role in successful restoration. Here, kinematics models of normal and prosthetic knees were created and validated using previously published data. METHODS Computed tomography and magnetic resonance imaging scans of a healthy, anticorrosive female cadaver were used ...

Fracture of a Polyethylene Tibial Post in a Scorpio Posterior-Stabilized Knee Prosthesis

We report the case of a polyethylene tibial post fracture in a 72-year-old woman 14 months after a Scorpio posterior-stabilized (PS) total knee arthroplasty. The polyethylene wear was found around the fracture site of the post, especially over the anterior aspect of the post base. The failure mechanism of the post fracture in the present case was anterior impingement with excessive wear over th...

Systematic Analysis of Painful Total Knee Prosthesis, a Diagnostic Algorithm

Posterior Stabilized Total Knee Arthroplasty

The posterior cruciate ligament (PCL) in total knee arthroplasty (TKA) functions to prevent posterior translation of the tibia and aids in femoral roll-back1. Roll-back allows for increased quadriceps lever arm and more efficient use of extensor musculature, permitting more normal stair climbing. Because of this, PCL retaining knees have the advantage of maintenance of ligamentous proprioceptio...

Kinematic analysis of posterior-stabilized total knee arthroplasty during standing up from and sitting down on a chair

BACKGROUND Total knee arthroplasty is effective to regain quality of life. Standing up from and sitting down on a chair and stair stepping motion are important in daily living. We previously reported in vivo kinematics of this implant during a stepping exercise. The purpose of this analysis was to assess in vivo knee motion during standing up from and sitting down on a chair and determine the m...