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Journal of Bone and Joint Surgery - British Volume, Vol 88-B, Issue 10,
1367-1372.
doi: 10.1302/0301-620X.88B10.17756 Copyright © 2006 by British Editorial Society of Bone and Joint Surgery A knee-sparing distal femoral endoprosthesis using hydroxyapatite-coated extracortical platesPRELIMINARY RESULTSA. Gupta, MBBS, MS(Orth), MRCS, Specialist Registrar1; R. Pollock, FRCS(Orth), Consultant Orthopaedic Surgeon1; S. R. Cannon, MCh(Orth), FRCS(Orth), Consultant Orthopaedic Surgeon1; T. W. R. Briggs, MCh(Orth), FRCS(Orth), Consultant Orthopaedic Surgeon1; J. Skinner, FRCS(Orth), Consultant Orthopaedic Surgeon1; and G. Blunn, PhD, Professor2
1 Department of Orthopaedic Oncology, Royal National Orthopaedic Hospital, Stanmore, Middlesex, HA7 4LP, UK. Correspondence should be sent to Mr A. Gupta at 24 Brendon Grove, East Finchley, London, N2 8JZ, UK; e-mail: ajaygupta{at}hotmail.co.uk
We used a knee-sparing distal femoral endoprosthesis in young patients with malignant bone tumours of the distal femur in whom it was possible to resect the tumour and to preserve the distal femoral condyles. The proximal shaft of the endoprosthesis had a coated hydroxyapatite collar, while the distal end had hydroxyapatite-coated extracortical plates to secure it to the small residual femoral condylar fragment. We reviewed the preliminary results of this endoprosthesis in eight patients with primary bone tumours of the distal femur. Their mean age at surgery was 17.years (14 to 21). The mean follow-up was 24 months (20 to 31). At final follow-up the mean flexion at the knee was 102° (20° to 120°) and the mean Musculoskeletal Tumour Society score was 80% (57% to 96.7%). There was excellent osteointegration at the prosthesis-proximal bone interface with formation of new bone around the hydroxyapatite collar. The prosthesis allowed preservation of the knee and achieved a good functional result. Formation of new bone and remodelling at the interface make the implant more secure. Further follow-up is required to determine the long-term structural integrity of the prosthesis. This article has been cited by other articles:
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