title: [A analysis on the effect of with or without patellar replacement in total knee arthroplasty].
abstract: OBJECTIVE
  To evaluate the outcome of total knee arthroplasty with or without resurfacing of the patella with particular attention to knee score, knee function score and incidence of postoperative anterior knee pain, providing the basis for the choice of surgical procedure.
  
  
  METHODS
  CNKI, PubMed, ScienceDirect, Highwire and other databases were searched for the randomized controlled trials relevant to the patellar with or without replacement in total knee replacement arthroplasty between 1998 and 2010, evaluating of the methodological quality of included studies and extracting valid data.
  
  
  RESULTS
  The 80 citations were identified as related to patellar resurfacing during total knee arthroplasty, 13 articles meet all inclusion criteria for this study. The incidence of postoperative anterior knee pain is greater in knees without replaced patellas (RR = 0.78, 95%CI: 0.61 - 0.99, P = 0.04). No differences are observed between the 2 groups for knee score and knee function score. Knee score (WMD = -0.49, 95%CI: -1.79 - 0.81, P = 0.46), knee function score (WMD = 1.10, 95%CI: -1.77 - 3.98, P = 0.45).
  
  
  CONCLUSIONS
  The patella replacement can significantly reduce the incidence of postoperative anterior knee pain. There is no difference in the knee score and knee function score between two groups.
authors.affiliation: Ningxia Medical University Postgraduate Education College, Yinchuan 750004, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Bao
authors.forename: Ji-hong
authors.initials: JH
authors.lastname: Hu
authors.forename: Qun-hua
authors.initials: QH
authors.lastname: Jin
mesh_terms: D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects / Q000379:methods*; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology; D010149:Postoperative Pain / Q000209:etiology; D010329:Patella / Q000601:surgery*; D016032:Randomized Controlled Trials as Topic