title: Fracture of a polyethylene tibial post in a Scorpio posterior-stabilized knee prosthesis.
abstract: 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.
authors.affiliation: Department of Orthopedic Surgery, Korea University College of Medicine, Guro Hospital, Seoul, Korea.
authors.forename: Hong Chul
authors.initials: HC
authors.lastname: Lim
authors.forename: Ji Hoon
authors.initials: JH
authors.lastname: Bae
authors.forename: Jin Ho
authors.initials: JH
authors.lastname: Hwang
authors.forename: Seung Joo
authors.initials: SJ
authors.lastname: Kim
authors.forename: Ji Yeol
authors.initials: JY
authors.lastname: Yoon
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging; D007720:Knee Prosthesis / Q000009:adverse effects*; D020370:Osteoarthritis, Knee / Q000601:surgery; D011095:Polyethylenes; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation
chemical_list: D011095:Polyethylenes