title: Total Knee Arthroplasty Using a Posterior Cruciate Ligament Sacrificing Medial Pivot Knee: Minimum 5-year Follow-up Results.
abstract: OBJECTIVE
  To evaluate minimum 5-year follow-up clinical and radiological results of total knee arthroplasty (TKA) using a posterior cruciate ligament sacrificing (PS), non-substituting Advance Medial Pivot Knee.
  
  
  METHODS
  One hundred and twenty knees in 80 patients who could be followed up for more than 5 years after TKA using the PS Advance Medial Pivot Knee were evaluated retrospectively. The evaluations included the preoperative and postoperative range of motion (ROM), tibiofemoral angle, Knee Society (KS) knee and function scores, and Western Ontario and McMaster Universities Arthritis Index (WOMAC) score. The Kaplan-Meier method was used for survival analysis.
  
  
  RESULTS
  The ROM increased from a preoperative mean flexion contracture of 7.6° and further flexion of 115.1° to a postoperative mean flexion contracture of 1.5° and further flexion of 120.5°. The tibiofemoral angle was changed from 4.6° varus preoperatively to 5.8° valgus postoperatively. The KS knee and function scores as well as WOMAC score significantly improved after surgery (p<0.05). Complications developed in 4 cases (3.3%): 2 cases of periprosthetic patellar fracture (1.7%) and 2 cases of aseptic loosening (1.7%). The seven-year survival rate was 98.1% in the Kaplan-Meier survival analysis.
  
  
  CONCLUSIONS
  The minimum 5-year follow-up results of TKA using the PS Medial Pivot Knee were satisfactory.
authors.affiliation: Department of Orthopedic Surgery, Arthro-center, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.
authors.forename: Yoon-Seok
authors.initials: YS
authors.lastname: Youm
authors.affiliation: Department of Orthopedic Surgery, Arthro-center, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.
authors.forename: Sung-Do
authors.initials: SD
authors.lastname: Cho
authors.affiliation: Department of Orthopedic Surgery, Arthro-center, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.
authors.forename: Seon-Ho
authors.initials: SH
authors.lastname: Lee
authors.affiliation: Department of Orthopedic Surgery, Arthro-center, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.
authors.forename: Hye-Yong
authors.initials: HY
authors.lastname: Cho
keywords: Arthroplasty; Knee; Medial Pivot