title: The fate of augments to treat type-2 bone defects in revision knee arthroplasty.
abstract: We report the five- to-ten year results of Anderson Orthopaedic Research Institute type-2 bone defects treated with modular metal augments in revision knee surgery. A total of 102 revision knee arthroplasties in patients with type-2 defects treated with augments and stems were prospectively studied. Seven patients (seven knees) had incomplete follow-up and 15 patients (16 knees) died with the arthroplasty in situ. The mean follow-up of the 79 remaining knees was 7 +/- 2 years (5 to 11). The presence of non-progressive radiolucent lines around the augment in 14% of knees was not associated with poorer knee scores, the range of movement, survival of the component or the type of insert which was used (p > 0.05). The survival of the components was 92 +/- 0.03% at 11 years (95% CI, 10.3 to 11.2). We recommend the use of modular augmentation devices to treat type-2 defects in revision knee surgery.
authors.affiliation: Division of Orthopaedics, London Health Sciences Center, University of Western Ontario, London, Canada.
authors.forename: J V
authors.initials: JV
authors.lastname: Patel
authors.forename: J L
authors.initials: JL
authors.lastname: Masonis
authors.forename: J
authors.initials: J
authors.lastname: Guerin
authors.forename: R B
authors.initials: RB
authors.lastname: Bourne
authors.forename: C H
authors.initials: CH
authors.lastname: Rorabeck
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001172:Arthritis, Rheumatoid / Q000601:surgery*; D019645:Arthroplasty, Replacement, Knee / Q000379:methods* / Q000592:standards; D005260:Female; D006801:Humans; D007720:Knee Prosthesis / Q000592:standards*; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery*; D011446:Prospective Studies; D011475:Prosthesis Failure; D016459:Prosthesis-Related Infections / Q000209:etiology; D012086:Reoperation