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KMID : 1207720090010020118
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Clinics in Orthopedic Surgery
2009 Volume.1 No. 2 p.118 ~ p.121
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Fracture of a Polyethylene Tibial Post in a Scorpio Posterior-Stabilized Knee Prosthesis
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Lim Hong-Chul
Hwang Jin-Ho
Bae Ji-Hoon
Yoon Ji-Yeol
Kim Seung-Joo
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Abstract
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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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KEYWORD
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Total knee arthroplasty, Posterior-stabilized, Anterior impingement, Polyethylene wear, Post fracture
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