title: [Long-term results of the Scorpio posterior-stabilized total knee arthroplasty].
abstract: OBJECTIVE
  To evaluate long-term result of Scorpio posterior-stabilized total knee arthroplasty.
  
  
  METHODS
  There were 160 patients (240 knees) underwent Scorpio posterior-stabilized total knee arthroplasty between December 1998 and December 2000, which were performed by the same surgeon. Patients were followed up from June 2013 to December 2013. Knee Society Scoring (KSS), Hospital for Special Surgery (HSS) patellofemoral scoring, standard weight-bearing anteroposterior and patellar tangential radiographs were assessed. Satisfaction of outcome was requested. Alignment of components and presence of radiolucent lines were assessed by the radiographic scoring system of knee society. Paired t-test was used compared to the data between preoperation and the time of last follow-up.
  
  
  RESULTS
  Ninety-five patients (141 knees) (59.4%) were followed up. Average follow-up duration was 13.3 years (range 12 to 15 years). Eight knees were revised due to periprosthetic infection (4 knees), aseptic loosening of tibial tray (3 knees) and wear-out of polyethylene insert (1 knee). Compared with preoperative ones, KSS knee score, KSS functional score and range of motion improved significantly (pre-operation: 26±16, 34±18, 87°±25°; follow-up time: 93±8, 78±27, 114°±22°) (t=45.55, 15.60, 13.03, all P<0.01). In terms of KSS knee score and HSS patellofemoral score, 106 knees were rated as excellence respectively. Ninety-five knees had satisfaction with outcome for maximum. The presences of radiolucent lines occurred around 5 femoral and 11 tibial components with range less than 2 mm. The survival rate at 10 years was 94.5% with revision for any reason as the end point.
  
  
  CONCLUSIONS
  The long-term study indicates that Scorpio posterior-stabilized knee system shows favorable clinical and radiological results.
authors.affiliation: Arthritis Clinic and Research Center, Peking University People's Hospital, Beijing 100044, China.
authors.forename: Qunjie
authors.initials: Q
authors.lastname: Zhong
authors.forename: Xin
authors.initials: X
authors.lastname: Zhi
authors.forename: Jianhao
authors.initials: J
authors.lastname: Lin
authors.forename: Houshan
authors.initials: H
authors.lastname: Lyu
mesh_terms: D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D005269:Femur / Q000000981:diagnostic imaging; D005500:Follow-Up Studies; D006801:Humans; D007719:Knee Joint / Q000601:surgery; D007720:Knee Prosthesis; D010329:Patella / Q000000981:diagnostic imaging; D020959:Polyethylene; D011859:Radiography; D016059:Range of Motion, Articular; D012086:Reoperation; D013977:Tibia / Q000000981:diagnostic imaging; D016896:Treatment Outcome
chemical_list: D020959:Polyethylene