title: Similar survival between screw cementless and cemented tibial components in young patients with osteoarthritis.
abstract: OBJECTIVE
  The aim of this study was to compare the outcomes of tibial fixation with either a cemented or cementless with screw augmentation component in young patients with non-inflammatory arthritis.
  
  
  METHODS
  Ninety-three patients aged 55 or younger with non-inflammatory arthritis were randomized to compare outcomes between cemented tibial fixation (48 patients) and cementless fixation with screw augmentation (45 patients). The femoral component was cementless in both groups. Post-operative evaluation was assessed by the clinical and radiological criteria of The Knee Society and WOMAC questionnaire.
  
  
  RESULTS
  The median follow-up was 6.7 (5-12) years. Significant differences were found for knee score (p = 0.02), range of motion (p = 0.04), and WOMAC score (p = 0.03). In the cemented group, there was one deep wound infection, four tibial aseptic loosening, and one polyethylene wear, all of which were revised. In the cementless group there was one tibial aseptic loosening and one polyethylene wear, both being revised. There was no difference in revision rate, and the cumulative survival at 9-year for aseptic reason was 93.7 % (95 % CI, 82-100 %) in the cementless group and 90.0 % (95 % CI, 80-100 %) in the cemented group (n.s.).
  
  
  CONCLUSIONS
  Cementless total knee arthroplasty was found to be a reliable option in younger patients with osteoarthritis. Although the revision rate and survival were similar in both groups, better clinical outcomes were obtained with cementless tibial components.
authors.affiliation: Department of Orthopaedic Surgery, Hospital General Elda, Ctra Elda-Sax s/n, 03600, Elda, Alicante, Spain, lizaur1@telefonica.net.
authors.forename: Alejandro
authors.initials: A
authors.lastname: Lizaur-Utrilla
authors.forename: Francisco A
authors.initials: FA
authors.lastname: Miralles-Muñoz
authors.forename: Fernando A
authors.initials: FA
authors.lastname: Lopez-Prats
mesh_terms: D000328:Adult; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D001843:Bone Cements; D001863:Bone Screws; D004311:Double-Blind Method; D019544:Equipment Failure Analysis; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery*; D011183:Postoperative Complications; D011446:Prospective Studies; D011475:Prosthesis Failure; D012086:Reoperation / Q000706:statistics & numerical data; D011795:Surveys and Questionnaires; D015996:Survival Rate; D013977:Tibia / Q000601:surgery*; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D001843:Bone Cements