title: Results of Total Knee Arthroplasty with NexGen LPS-flex Implant Using Navigation System (Brain Lab): Results with a 5-year Follow-up.
abstract: OBJECTIVE
  To evaluate the clinical and radiological results of patients that underwent total knee arthroplasty (TKA) with a NexGen LPS-Flex implant using a Navigation system (Brain Lab).
  
  
  METHODS
  Between January 2001 and December 2005, 55 knees in 46 patients which used the NexGen LPS-Flex implant with a Navigation system (Brain Lab) for primary TKA were clinically and radiologically evaluated after a minimum follow-up of 5 years. Evaluation included preoperative and postoperative range of motion (ROM), Knee Society Score (KSS), tibio-femoral angle and postoperative complications.
  
  
  RESULTS
  Knee ROM was increased from 118.9° preoperatively to 126.9° at the last follow up. In addition, the preoperative flexion contracture improved from 6.5° to 1.8° postoperatively. The mean KSS and functional score were improved from 59.8 and 51.2 to postoperative scores of 86.4 and 85.2 respectively. The rate of appearance of radiolucency in X-ray was 21.8%. One case of superficial skin infection and one case of aseptic loosening were noted as complications but, did not require a revision surgery.
  
  
  CONCLUSIONS
  TKA with NexGen LPS-Flex implant using Navigation system (Brain Lab) showed satisfactory improvement in pain and function, but more long term follow up will be needed to complete verification.
authors.affiliation: Department of Orthopedic Surgery, Keimyung University School of Medicine, Daegu, Korea.
authors.forename: Chul Hyung
authors.initials: CH
authors.lastname: Kang
authors.forename: Kyung Jae
authors.initials: KJ
authors.lastname: Lee
authors.forename: Ki Cheor
authors.initials: KC
authors.lastname: Bae
authors.forename: Chul Hyun
authors.initials: CH
authors.lastname: Cho
authors.forename: Si Wook
authors.initials: SW
authors.lastname: Lee
authors.forename: Hong Kwan
authors.initials: HK
authors.lastname: Shin
authors.forename: Young Kook
authors.initials: YK
authors.lastname: Lee
authors.forename: Ji Suk
authors.initials: JS
authors.lastname: Bae