Abstract
Background: Tibial polyethylene wear is related late failure in total knee arthroplasty. The cruciate substitute design depending on the campost mechanism to secure the knee cinematics after a posterior stabilized total knee arthroplasty (PS-TKA). A post fracture can occur after damage failure of the post. Aim: Report a case of post refracture after a PS-TKA and review the lecture about post wear in PS-TKA. Case presentation: A 63 woman with a primary TKA had a diagnosis of polyethylene post fracture. The polyethylene exchange wasn’t enough and revisions of all components were necessary. Conclusion: In patient with previous well function, subtle swelling and giving away sings after PS-TKA, a post fracture must be excluded.
Highlights
Total knee arthroplasty (TKA) is a treatment option for patients with advanced knee degenerative disease [1]
The cruciate substitute design depending on the cam-post mechanism to secure the knee cinematics after a posterior stabilized total knee arthroplasty (PS-TKA)
Aim: Report a case of post refracture after a PS-TKA and review the lecture about post wear in PS-TKA
Summary
Total knee arthroplasty (TKA) is a treatment option for patients with advanced knee degenerative disease [1]. The statisticians projected 935.000 and 1260.000 primary TKAs per year, by 2030 [2]. The posterior stabilized total knee arthroplasty (PS-TKA) design with a tibial polyethylene post and femoral cam was created to optimize knee kinematics and maintain flexion stability after resected the posterior cruciate ligament [3] [4]. The cam-post interface is exposed to constant wear and damage in PS-TKA design [3]. Tibial polyethylenepost damage due to failure fracture is a major problem and revision knee arthroplasty indication [5] [6].
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