Fracture of a Polyethylene Tibial Post in a Scorpio Posterior-Stabilized Knee Prosthesis
نویسندگان
چکیده
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 the base of the anterior aspect of the tibial post, which became a stress-riser of post and cam articulation. This is the first report of a polyethylene tibial post fracture of a Scorpio PS prosthesis.
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Polyethylene Tibial Post Fracture in a Posterior Stabilized (Genesis II) Total Knee Arthroplasty
Posterior stabilizing knee prostheses have been increasing in popularity recently due to some studies showing excellent long-term survivorship, more consistent kinematics, technical ease, and higher range of motion.1,2 The posterior stabilized knee relies on a cam and post mechanism to replicate native femoral rollback. One of the major potential complications of this system is post fracture. T...
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