title: Modular versus all-polyethylene tibial components: comparison of pre- and early post-operative patient scores in total knee replacement.
abstract: BACKGROUND
  All-polyethylene (AP) tibial components of total knee replacement (TKR) are substantially cheaper than their modular counterparts. It is well established that their survivorship and radiographic outcomes are comparable. In this study, patient-derived outcome measures were used to compare these two implant types.
  
  
  METHODS
  A cohort of 456 primary TKRs (142 AP, 314 modular) were assessed with preoperative and 1-year post-operative Oxford Knee Score, Western Ontario and McMaster Universities Arthritis Index and Short Form - 12 scores.
  
  
  RESULTS
  Both groups performed well with no significant difference in improvement and final scores at 1 year. Although there was a significant difference in mean age among the groups (P < 0.001) age-adjusted scores continued to show no significant difference between the two groups.
  
  
  CONCLUSIONS
  Our results support the more frequent use of AP tibial components for uncomplicated TKR.
authors.affiliation: Tauranga Orthopaedic Research Society (TORSI), Grace Orthopaedic Centre, Tauranga, New Zealand.
authors.forename: Bruno R
authors.initials: BR
authors.lastname: De Carvalho
authors.forename: Omid S
authors.initials: OS
authors.lastname: Yassaie
authors.forename: Dawson C W
authors.initials: DC
authors.lastname: Muir
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001168:Arthritis / Q000601:surgery*; D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation*; D005260:Female; D005500:Follow-Up Studies; D006305:Health Status Indicators; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D020959:Polyethylene; D011184:Postoperative Period; D057234:Preoperative Period; D011474:Prosthesis Design; D012042:Registries; D016896:Treatment Outcome
chemical_list: D020959:Polyethylene
keywords: knee prosthesis; knee replacement arthroplasty; total knee replacement