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Journal of Bone and Joint Surgery - British Volume, Vol 86-B, Issue 2,
195-199.
doi: 10.1302/0301-620X.86B2.13564 Copyright © 2004 by British Editorial Society of Bone and Joint Surgery The fate of augments to treat type-2 bone defects in revision knee arthroplastyJ. V. Patel, BM FRCS (Tr and Orth), Consultant Orthopaedic Surgeon; J. L. Masonis, MD, Attending Orthopaedic Surgeon; J. Guerin, BMath, Research Director; R. B. Bourne, MD, FRCS C, Professor Orthopaedic Surgery; and C. H. Rorabeck, MD FRCS C, Professor of Orthopaedic SurgeryDivision of Orthopaedics, London Health Sciences Center, University of Western Ontario, 339 Windermere Road, London, Ontario N6A 5A5, Canada. Correspondence should be sent to Mr J. V. Patel at the Department of Orthopaedics, The Middlesex Hospital, Mortimer Street, London W1T 3AA, UK. 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.
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