title: Short-Term Results of Total Knee Arthroplasty with Anterior-Posterior Glide LCS Mobile-Bearing System.
abstract: OBJECTIVE
  To evaluate the clinical and radiological results of total knee arthroplasty (TKA) using the anterior-posterior glide (APG) low contact stress (LCS) mobile-bearing system.
  
  
  METHODS
  We evaluated 130 knees in 117 patients who had undergone TKA with APG LCS mobile-bearing system between September 2005 and July 2007 and could be followed over 5 years. The mean follow-up period was 68 months. The clinical and radiological results were evaluated using the American Knee Society Scoring System, Oxford knee score and the American Knee Society Roentgenographic Evaluation and Scoring System. And we analyzed short-term postoperative complications.
  
  
  RESULTS
  The average range of motion of the knee joint was 107.9° (range, 70° to 135°) preoperatively and 125.2° (range, 90° to 135°) at the last follow-up. The average knee and functional scores were improved from 39.1 and 42.0 to 71.2 and 75.6, respectively, between the preoperative and last follow-up evaluation. The Oxford knee score was decreased from 42.9 preoperatively to 23.1 at the last follow-up. The femoro-tibial angle (anatomical axis) changed from 10.1° varus preoperatively to 3.3° valgus at the last follow-up. Radiolucency was observed in 14% of all cases. There were 1 case of traumatic dislocation of the polyethylene liner, 1 case of aseptic loosening and 6 cases of posterior instability because of posterior cruciate ligament (PCL) insufficiency.
  
  
  CONCLUSIONS
  TKA with APG LCS mobile-bearing system demonstrated relatively good short-term clinical and radiological results. However, further considerations for posterior instability associated with PCL insufficiency are needed.
authors.affiliation: Department of Orthopaedic Surgery, Dong-Eui Medical Center, Busan, Korea.
authors.forename: Kyung Taek
authors.initials: KT
authors.lastname: Kim
authors.affiliation: Department of Orthopaedic Surgery, Dong-Eui Medical Center, Busan, Korea.
authors.forename: Min Soo
authors.initials: MS
authors.lastname: Kang
authors.affiliation: Department of Orthopaedic Surgery, Busan Bon Hospital, Busan, Korea.
authors.forename: Young Hoon
authors.initials: YH
authors.lastname: Lim
authors.affiliation: Department of Orthopaedic Surgery, Dong-A Medical Center, Busan, Korea.
authors.forename: Jin Woo
authors.initials: JW
authors.lastname: Park
authors.affiliation: Department of Orthopaedic Surgery, Dong-A Medical Center, Busan, Korea.
authors.forename: Lih
authors.initials: L
authors.lastname: Wang
keywords: Anterior-posterior glide; Arthroplasty; Knee; Low contact stress; Mobile-bearing; Posterior instability