Internal rotational error of the tibial component is a major cause of pain after total knee replacement

D. Nicoll, D. I. Rowley

    Research output: Contribution to journalArticle

    168 Citations (Scopus)

    Abstract

    This study used CT analysis to determine the rotational alignment of 39 painful and 26 painless fixed-bearing total knee replacements (TKRs) from a cohort of 740 NexGen Legacy posterior-stabilised and cruciate-retaining prostheses implanted between May 1996 and August 2003.

    The mean rotation of the tibial component was 4.3 of internal rotation (25.4 internal to 13.9 external rotation) in the painful group and 2.2 of external rotation (8.5 internal to 18.2 external rotation) in the painfree group (p = 0.024). In the painful group 17 tibial components were internally rotated more than 9 compared with none in the painfree group (p < 0.001). Additionally, six femoral components in the painful group were internally rotated more than 6 compared with none in the painfree group (p = 0.017). External rotational errors were not found to be associated with pain.

    Overall, 22 (56.4%) of the painful TKRs had internal rotational errors involving the femoral, the tibial or both components. It is estimated that at least 4.6% of all our TKRs have been implanted with significant internal rotational errors.

    Original languageEnglish
    Pages (from-to)1238-1244
    Number of pages7
    JournalJournal of Bone and Joint Surgery - British Volume
    Volume92B
    Issue number9
    DOIs
    Publication statusPublished - Sep 2010

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