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Comparison of outcomes after UKA in patients with and without chondrocalcinosis: a matched cohort study

  • Knee
  • Published:
Knee Surgery, Sports Traumatology, Arthroscopy Aims and scope

Abstract

Purpose

Chondrocalcinosis can be associated with an inflammatory arthritis and aggressive joint destruction. There is uncertainty as to whether chondrocalcinosis represents a contraindication to unicompartmental knee arthroplasty (UKA). This study reports the outcome of a consecutive series of patients with chondrocalcinosis and medial compartment osteoarthritis treated with UKA matched to controls.

Methods

Between 1998 and 2008, 88 patients with radiological chondrocalcinosis (R-CCK) and 67 patients with histological chondrocalcinosis (H-CCK) were treated for end-stage medial compartment arthritis with Oxford UKA. One-to-two matching was performed to controls, treated with UKA, but without evidence of chondrocalcinosis. Functional outcome and implant survival were assessed in each group.

Results

The mean follow-up was 10 years. The mean Oxford Knee Score (OKS) at final follow-up was 43, 41 and 41 in H-CCK, R-CCK and control groups (change from baseline OKS was 21, 18 and 15, respectively). The change was significantly higher in H-CCK than in control but was not significantly different in R-CCK. Ten-year survival was 96 % in R-CCK, 86 % in H-CCK and 98 % in controls. Although the survival in H-CCK was significantly worse than in control, only one failure was due to disease progression.

Conclusion

The presence of R-CCK does not influence functional outcome or survival following UKA. Pre-operative radiological evidence of CCK should not be considered to be a contraindication to UKA. H-CCK is associated with significantly improved clinical outcomes but also a higher revision rate compared with controls.

Level of evidence

Case control study, Level III.

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Authors and Affiliations

  1. Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS), University of Oxford, Nuffield Orthopaedic Centre, Windmill Road, Oxford, OX3 7LD, UK

    V. Kumar, H. G. Pandit, A. D. Liddle, W. Borror, C. Jenkins, S. J. Mellon, T. W. Hamilton, N. Athanasou, C. A. F. Dodd & D. W. Murray

Authors
  1. V. Kumar
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  2. H. G. Pandit
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  3. A. D. Liddle
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  4. W. Borror
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  5. C. Jenkins
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  6. S. J. Mellon
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  7. T. W. Hamilton
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  8. N. Athanasou
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  9. C. A. F. Dodd
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  10. D. W. Murray
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Corresponding author

Correspondence to H. G. Pandit.

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Kumar, V., Pandit, H.G., Liddle, A.D. et al. Comparison of outcomes after UKA in patients with and without chondrocalcinosis: a matched cohort study. Knee Surg Sports Traumatol Arthrosc 25, 319–324 (2017). https://doi.org/10.1007/s00167-015-3578-8

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  • DOI: https://doi.org/10.1007/s00167-015-3578-8

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