title: Incidence and reasons for reoperation after minimally invasive unicompartmental knee arthroplasty.
abstract: The goal of this report is to review reoperations undertaken on the initial 221 unicompartmental arthroplasties performed using a minimally invasive technique. A comparison was then performed between these cases and the previous 514 open medial unicompartmental arthroplasties performed at our institution. In the minimally invasive group, 9 (4.1%) of 221 knees were revised (8 for component loosening, 1 for deep infection). Of 212 unrevised knees, 16 have required a total of 18 nonrevision reoperations. Overall, 25 of 221 knees required at least 1 reoperation (total reoperation rate, 11.3%). Despite an accelerated recovery and decreased hospital stay in our minimally invasive unicompartmental arthroplasties, the rate of revision due to aseptic loosening (3.7% vs 1.0%) and the overall reoperation rate (11.3% vs 8.6%) compare unfavorably with those performed with an open technique.
authors.affiliation: Anderson Orthopaedic Research Institute, Alexandria, Virginia, USA.
authors.forename: William G
authors.initials: WG
authors.lastname: Hamilton
authors.forename: Matthew B
authors.initials: MB
authors.lastname: Collier
authors.forename: Eshan
authors.initials: E
authors.lastname: Tarabee
authors.forename: James P
authors.initials: JP
authors.lastname: McAuley
authors.forename: C Anderson
authors.initials: CA
authors.lastname: Engh
authors.forename: Gerard A
authors.initials: GA
authors.lastname: Engh
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects* / Q000379:methods; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D019060:Minimally Invasive Surgical Procedures / Q000009:adverse effects* / Q000379:methods / Q000706:statistics & numerical data; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation / Q000706:statistics & numerical data; D012189:Retrospective Studies; D016896:Treatment Outcome