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Journal of Bone and Joint Surgery - British Volume, Vol 91-B, Issue 2, 185-189.
doi: 10.1302/0301-620X.91B2.21413  
Copyright © 2009 by British Editorial Society of Bone and Joint Surgery
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Cementless Oxford unicompartmental knee replacement shows reduced radiolucency at one year

H. Pandit, FRCS(Orth), Senior Clinical and Research Fellow1; C. Jenkins, BSc, Senior Research Physiotherapist1; D. J. Beard, DPhil, University Research Lecturer and Research Council UK Fellow1; J. Gallagher, FRCS, Clinical and Research Fellow1; A. J. Price, FRCS(Orth), Reader in Musculoskeletal Science and Consultant Orthopaedic Surgeon1; C. A. F. Dodd, FRCS, Consultant Orthopaedic Surgeon1; J. W. Goodfellow, FRCS, Emeritus Consultant Orthopaedic Surgeon1; and D. W. Murray, MD, FRCS(Orth), Professor of Orthopaedic Surgery, Consultant Orthopaedic Surgeon1

1 Oxford Orthopaedic Engineering Centre, Nuffield Department of Orthopaedic Surgery, Botnar Research Centre, Nuffield Orthopaedic Centre, Headington, Oxford OX3 7LD, UK.

Correspondence should be sent to Professor D. W. Murray; e-mail: barbara.marks{at}ndos.ox.ac.uk

We randomised 62 knees to receive either cemented or cementless versions of the Oxford unicompartmental knee replacement. The implants used in both arms of the study were similar, except that the cementless components were coated with porous titanium and hydroxyapatite. The tibial interfaces were studied with fluoroscopically-aligned radiographs.

At one year there was no difference in clinical outcome between the two groups. Narrow radiolucent lines were seen at the bone-implant interfaces in 75% of cemented tibial components. These were partial in 43%, and complete in 32%. In the cementless implants, partial radiolucencies were seen in 7% and complete radiolucencies in none. These differences are statistically significant (p < 0.0001) and imply satisfactory bone ingrowth into the cementless implants.




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A. Gulati, R. Chau, H. G. Pandit, H. Gray, A. J. Price, C. A. F. Dodd, and D. W. Murray
The incidence of physiological radiolucency following Oxford unicompartmental knee replacement and its relationship to outcome
J Bone Joint Surg Br, July 1, 2009; 91-B(7): 896 - 902.
[Abstract] [Full Text] [PDF]


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Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General