title: Comparison of functional performance after total knee arthroplasty using rotating platform and fixed-bearing prostheses with or without patellar resurfacing.
abstract: OBJECTIVE
  To retrospectively compare the functional performances of rotating platform and fixed-bearing total knee arthroplasties with or without patellar resurfacing.
  
  
  METHODS
  One hundred and ninety-seven patients (205 knees) of mean age 66.4 years were randomly assigned to receive different prostheses. One hundred ninety-five patients, including 97 fixed-bearing prostheses with 37 patellae resurfaced and 106 rotating platform prostheses with 76 patellae resurfaced, were followed up for a mean duration of 32 months.
  
  
  RESULTS
  Outcomes in the rotating platform with patellar resurfacing and fixed-bearing with patellar resurfacing groups did not differ significantly according to Hospital for Special Surgery (HSS) scores and flexion and extension angles. For total knee arthroplasties without patellar resurfacing, there were no significant differences in HSS score and flexion angle between the rotating platform and fixed-bearing subgroups. Although the extension angle of rotating platform prostheses was slightly better than that of the fixed-bearing in the patellar non-resurfacing group, this difference was not clinically significant.
  
  
  CONCLUSIONS
  Rotating platform and fixed-bearing prostheses have similar overall postoperative outcomes with regard to postoperative HSS scores and extension and flexion angles. Rotating platform prostheses are not superior to fixed bearing prostheses.
authors: Department of Orthopaedic Surgery, Zhongnan Hospital, Wuhan University, China. lbchen@whu.edu.cn
authors: Liao-bin
authors: LB
authors: Chen
authors: Yang
authors: Y
authors: Tan
authors: Mohammed
authors: M
authors: Al-Aidaros
authors: Hua
authors: H
authors: Wang
authors: Xin
authors: X
authors: Wang
authors: Shu-han
authors: SH
authors: Cai
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology; D007720:Knee Prosthesis; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000000981:diagnostic imaging / Q000601:surgery; D010329:Patella / Q000601:surgery*; D011474:Prosthesis Design; D011859:Radiography; D016059:Range of Motion, Articular; D012189:Retrospective Studies; D016896:Treatment Outcome
references: Clin Orthop Relat Res. 2003 May;(410):131-8
references: 12771823
references: J Arthroplasty. 2002 Sep;17(6):685-92
references: 12216020
references: J Bone Joint Surg Am. 2006 May;88(5):1006-10
references: 16651575
references: Clin Orthop Relat Res. 1990 Nov;(260):162-9
references: 2225619
references: J Bone Joint Surg Br. 2007 Jul;89(7):904-10
references: 17673583
references: J Arthroplasty. 2008 Oct;23(7 Suppl):11-4
references: 18701250
references: J Bone Joint Surg Am. 2009 Sep;91(9):2104-12
references: 19723986
references: J Arthroplasty. 2012 Feb;27(2):207-12
references: 21752586
references: Clin Orthop Relat Res. 1993 Jan;(286):94-102
references: 8425373
references: Clin Orthop Relat Res. 2008 Aug;466(8):1959-65
references: 18523833
references: J Bone Joint Surg Am. 2009 Jan;91(1):134-41
references: 19122088
references: J Orthop Surg Res. 2007 Jan 05;2:1
references: 17204165
references: Proc Inst Mech Eng H. 1996;210(3):217-22
references: 8885659
references: J Bone Joint Surg Br. 2003 Jan;85(1):62-7
references: 12585579
references: Acta Orthop Belg. 2008 Dec;74(6):801-8
references: 19205328
references: J Arthroplasty. 2004 Jan;19(1):35-9
references: 14716648
references: Arch Orthop Trauma Surg. 2012 Jun;132(6):875-81
references: 22526193
references: J Bone Joint Surg Am. 2012 May 16;94(10):866-73
references: 22617913
references: J Arthroplasty. 1997 Feb;12(2):149-54
references: 9139096
references: Knee Surg Sports Traumatol Arthrosc. 2009 Mar;17(3):237-43
references: 19020863
references: J Bone Joint Surg Br. 1978 Aug;60-B(3):358-69
references: 581081
references: Chang Gung Med J. 2006 Sep-Oct;29(5):448-57
references: 17214388