title: No difference between fixed- and mobile-bearing total knee arthroplasty in activities of daily living and pain: a randomized clinical trial.
abstract: OBJECTIVE
  Until now, there are no definitive conclusions regarding functional differences related to middle- and long-term everyday activities and patient pain following implantation of mobile- and fixed-platform tibial prostheses. The aim of this study was to determine whether there are middle-term differences in knee function and pain in patients undergoing fixed- and mobile-bearing total knee arthroplasty (TKA).
  
  
  METHODS
  Eligible patients were randomized into two groups: the first group received TKA implantation with a fixed tibial platform (group A); the second group received TKA with a mobile tibial platform (group B). Patients were followed up (2 years), and their symptoms and limitations in daily living activities were evaluated using the Knee Outcome Survey-Activities of Daily Living Scale (ADLS), in addition to pain evaluation assessed using the pain visual analogue scale (VAS).
  
  
  RESULTS
  There were no significant differences in function and symptoms in the ADLS and VAS between the study groups.
  
  
  CONCLUSIONS
  The type of platform used in TKA (fixed vs. mobile) does not change the symptoms, function or pain of patients 2 years post-surgery. Although mobile TKAs may have better short-term results, at medium- and long-term follow-up they do not present important clinical differences compared with fixed-platform TKAs. This information is important so that surgeons can choose the most suitable implant for each patient.
  
  
  METHODS
  Randomized clinical trial, Level I.
authors.affiliation: Departamento de Ortopedia e Traumatologia, Centro de Traumatologia do Esporte (CETE), Universidade Federal de São Paulo, Rua Borges Lagoa, 783, 5° andar, Vila Clementino, São Paulo, SP, CEP 04038-032, Brazil.
authors.forename: Joicemar Tarouco
authors.initials: JT
authors.lastname: Amaro
authors.affiliation: Departamento de Ortopedia e Traumatologia, Centro de Traumatologia do Esporte (CETE), Universidade Federal de São Paulo, Rua Borges Lagoa, 783, 5° andar, Vila Clementino, São Paulo, SP, CEP 04038-032, Brazil. ggarliani@hotmail.com.
authors.forename: Gustavo Gonçalves
authors.initials: GG
authors.lastname: Arliani
authors.affiliation: Departamento de Ortopedia e Traumatologia, Centro de Traumatologia do Esporte (CETE), Universidade Federal de São Paulo, Rua Borges Lagoa, 783, 5° andar, Vila Clementino, São Paulo, SP, CEP 04038-032, Brazil.
authors.forename: Diego Costa
authors.initials: DC
authors.lastname: Astur
authors.affiliation: Departamento de Ortopedia e Traumatologia, Universidade Federal de São Paulo, São Paulo, SP, Brazil.
authors.forename: Pedro
authors.initials: P
authors.lastname: Debieux
authors.affiliation: Grupo do Joelho, Departamento de Ortopedia e Traumatologia, Faculdade de Ciências Médicas da Santa Casa de São Paulo, São Paulo, SP, Brazil.
authors.forename: Camila Cohen
authors.initials: CC
authors.lastname: Kaleka
authors.affiliation: Departamento de Ortopedia e Traumatologia, Centro de Traumatologia do Esporte (CETE), Universidade Federal de São Paulo, Rua Borges Lagoa, 783, 5° andar, Vila Clementino, São Paulo, SP, CEP 04038-032, Brazil.
authors.forename: Moises
authors.initials: M
authors.lastname: Cohen
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000379:methods; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D007720:Knee Prosthesis; D008279:Magnetic Resonance Imaging; D008297:Male; D020370:Osteoarthritis, Knee / Q000000981:diagnostic imaging / Q000523:psychology / Q000601:surgery*; D010147:Pain Measurement; D010149:Postoperative Pain; D016896:Treatment Outcome
keywords: Arthroplasty; Clinical trial; Knee; Pain; Replacement