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Knee Surgery, Sports Traumatology, Arthroscopy
Published in: Knee Surgery, Sports Traumatology, Arthroscopy 3/2017

01-03-2017 | Knee

Five-year experience of cementless Oxford unicompartmental knee replacement

Authors: H. G. Pandit, S. Campi, T. W. Hamilton, O. D. Dada, S. Pollalis, C. Jenkins, C. A. F. Dodd, D. W. Murray

Published in: Knee Surgery, Sports Traumatology, Arthroscopy | Issue 3/2017

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Abstract

Purpose

Cementless unicompartmental knee replacement (UKR) was introduced to address some of the problems that can occur following cemented UKR. The aim of this study was to report the 5-year experience of the first 512 medial cementless Oxford UKR implanted by two surgeons for the recommended indications.

Methods

The first consecutive 512 cementless Phase 3 Oxford UKRs implanted by two surgeons for the recommended indications between June 2004 and October 2013 were prospectively identified and followed up independently. All the procedures were carried out through a minimally invasive approach without eversion or dislocation of the patella. Patients were assessed clinically pre-operatively and at 1, 2, 5, 7 and 10 years after surgery with functional outcome scores and radiographs.

Results

There were eight reoperations of which six were revisions giving a 5-year survival of 98 % (95 % CI 94–100 %). At a mean follow-up of 3.4 years (1.0–10.2), the mean OKS was 43 (SD 7), AKSS (objective) was 81 (SD 13), and AKSS (functional) was 86 (SD 17). The first 120 cases had a minimum follow-up of 5 years (mean 5.9; range 5–10.2). In these patients, the mean OKS was 41 (SD 8), AKSS (objective) was 81 (SD 14), and AKSS (functional) was 82 (SD 18). There were no femoral radiolucencies and no complete tibial radiolucencies. 11 % of tibial components had partial radiolucent lines; the remaining 89 % had no radiolucencies.

Conclusion

The clinical results are as good as or better than those previously reported for cemented fixation. The radiographic results are better with secure bony attachment to the implants in every case.

Level of evidence

IV.
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Metadata
Title
Five-year experience of cementless Oxford unicompartmental knee replacement
Authors
H. G. Pandit
S. Campi
T. W. Hamilton
O. D. Dada
S. Pollalis
C. Jenkins
C. A. F. Dodd
D. W. Murray
Publication date
01-03-2017
Publisher
Springer Berlin Heidelberg
Published in
Knee Surgery, Sports Traumatology, Arthroscopy / Issue 3/2017
Print ISSN: 0942-2056
Electronic ISSN: 1433-7347
DOI
https://doi.org/10.1007/s00167-015-3879-y

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