The progression of arthritis following lateral unicompartmental knee replacement

MJ Walton, AE Weale, JH Newman

    Research output: Contribution to journalArticle (Academic Journal)peer-review

    26 Citations (Scopus)

    Abstract

    In order to aid patient selection we have analysed the radiological progression of arthritis in the retained compartments following lateral unicompartmental knee replacement (UKR). Patients undergoing lateral UKR (St Georg Sled, Waldemar Link) between 1988 and 1999 were assessed. Radiographs taken post-operatively within 8 weeks and at 5 years were assessed. OA was classified using both the Altman and Ahlbach scoring systems. Identifying information on each radiograph was obscured so that the observer was blinded. Each radiograph was reviewed twice to assess intra-observer variability. Patients were assessed clinically using the Bristol Knee Score (BKS) at 1 and 5 years post-operation. Reproducibility for the Ahlbach systems was shown to be very good (kappa = 0.86) and the Altman moderate (kappa = 0.41). Thirty-two lateral UKRs were assessed at 5 years. Six out of 32 of the knees assessed showed definite progression of OA on the Ahlbach score in the retained medial compartment and 11 out of 32 on the Altman. There was a statistically significant increase in the grade of OA, as assessed by both systems, at 5 years as compared to the post-operative radiograph (p <0.001). The definite progression group had a mean BKS 10 points lower at 5 years. Six patients required revision to TKR for progression of arthritis in the retained compartments. Lateral compartment UKR can be a very successful procedure, but there is a greater rate of progression of arthritis in the retained medial compartment than following medial UKR.
    Translated title of the contributionThe progression of arthritis following lateral unicompartmental knee replacement
    Original languageEnglish
    Pages (from-to)374 - 377
    Number of pages4
    JournalKnee
    Volume13 (5)
    DOIs
    Publication statusPublished - Oct 2006

    Bibliographical note

    Publisher: Elsevier

    Fingerprint Dive into the research topics of 'The progression of arthritis following lateral unicompartmental knee replacement'. Together they form a unique fingerprint.

    Cite this