title: Why are total knee arthroplasties being revised?
abstract: Despite technical improvements, revision rates for total knee arthroplasties (TKAs) remain high. Our goal was to report the reason(s) for revision TKA in a large, current, multicenter series and compare those reasons with previously published reasons. We retrospectively identified 820 consecutive revision TKAs (693 patients, 2000-2012) from our 3 centers and recorded the primary reason for the revision. The top seven reasons for the revision were aseptic loosening (23.1%), infection (18.4%), polyethylene wear (18.1%), instability (17.7%), pain/stiffness (9.3%), osteolysis (4.5%), and malposition/malalignment (2.9%). Comparison with previously published reasons showed fewer TKA revisions for polyethylene wear, osteolysis, instability, and malalignment. These changes may represent improvements in surgical technique and implants.
authors.affiliation: Towson Orthopaedic Associates, Towson, Maryland.
authors.forename: David F
authors.initials: DF
authors.lastname: Dalury
authors.forename: Donald L
authors.initials: DL
authors.lastname: Pomeroy
authors.forename: Robert S
authors.initials: RS
authors.lastname: Gorab
authors.forename: Mary Jo
authors.initials: MJ
authors.lastname: Adams
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000639:trends*; D017760:Bone Malalignment / Q000150:complications / Q000453:epidemiology; D005260:Female; D006801:Humans; D015994:Incidence; D007593:Joint Instability / Q000150:complications / Q000453:epidemiology; D007719:Knee Joint / Q000601:surgery*; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D010014:Osteolysis / Q000150:complications / Q000453:epidemiology; D011475:Prosthesis Failure / Q000009:adverse effects / Q000209:etiology* / Q000639:trends*; D016459:Prosthesis-Related Infections / Q000150:complications / Q000453:epidemiology; D012086:Reoperation / Q000639:trends; D012189:Retrospective Studies
keywords: current; diagnosis; knee arthroplasty; outcome;; revision total knee arthroplasty