title: [Effect of patellar non-resurfacing on clinical results after total knee arthroplasty/].
abstract: OBJECTIVE
  To evaluate the influence of patellar non-resurfacing on the effectiveness after total knee arthroplasty (TKA).
  
  
  METHODS
  Between April 2008 and April 2011, 163 patients with degenerative osteoarthritis of the knee underwent TKA without patellar resurfacing, and the clinical data were retrospectively analyzed. There were 65 males and 98 females, with a mean age of 63 years (range, 54-78 years). According to Outerbridge classification for cartilage degeneration, 22 cases were classified as grade I, 38 cases as grade II, 64 cases as grade III, and 39 cases as grade IV. There was no significant difference in gender, age, and sides among patients at 4 grades (P > 0.05). The intraoperative tourniquet-using time and postoperative complications were recorded; the knee society score (KSS), patella score (PS), patients' satisfaction, and anterior knee pain [using visual analogue scale (VAS)] were used to evaluate the knee function. X-ray films were routinely taken to observe the position of the prosthesis and the patella.
  
  
  RESULTS
  The mean tourniquet-using time was 125 minutes (range, 90-150 minutes). All incisions obtained healing by first intention, and no early postoperative complication occurred. All patients were followed up 2-5 years (mean, 3.6 years). The KSS and PS scores were significantly improved at 6 months and last follow-up when compared with preoperative scores (P < 0.05), but no significant difference between at 6 months and last follow-up (P > 0.05). Significant differences in KSS and PS scores were found among patients with different grades of cartilage degeneration at preoperation (P < 0.05), but no significant difference at last follow-up (P > 0.05). At last follow-up, 7 patients experienced anterior knee pain (mild pain in 5, moderate pain in 2). The results of satisfaction were very satisfied in 90 cases, satisfied in 66 cases, not certain in 5 cases, and not satisfied in 2 cases. No significant difference was found in satisfaction and anterior knee pain among patients with different grades of cartilage degeneration (P > 0.05).
  
  
  CONCLUSIONS
  Patellar non-resurfacing has no effect on the effectiveness after TKA.
authors.affiliation: No.1 Department of Orthopedics, First People's Hospital of Kashigar, Kashigar Xinjiang 844000, PR China.
authors.forename: Ajimu
authors.initials: A
authors.lastname: Keremu
authors.affiliation: Department of Orthopaedics, Affiliated Tumor Hospital of Xinjiang Medical University, PR China.
authors.forename: Hashimu
authors.initials: H
authors.lastname: Maimaitiaili
authors.affiliation: No.1 Department of Orthopedics, First People's Hospital of Kashigar, Kashigar Xinjiang 844000, PR China.
authors.forename: Pinglian
authors.initials: P
authors.lastname: Shan
authors.affiliation: No.1 Department of Orthopedics, First People's Hospital of Kashigar, Kashigar Xinjiang 844000, PR China.
authors.forename: Aila
authors.initials: A
authors.lastname: Abudu
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects / Q000379:methods*; D002358:Cartilage, Articular / Q000473:pathology / Q000601:surgery; D005260:Female; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery*; D010147:Pain Measurement; D010149:Postoperative Pain / Q000209:etiology; D010329:Patella / Q000473:pathology / Q000601:surgery*; D017060:Patient Satisfaction; D016059:Range of Motion, Articular; D020127:Recovery of Function; D012189:Retrospective Studies; D016896:Treatment Outcome