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    Clin Orthop Relat Res. 2009 Mar;467(3):692-8. Epub 2008 Oct 22.

    Femoral morphology due to impingement influences the range of motion in slipped capital femoral epiphysis.

    Source

    Department of Orthopaedic Surgery, Inselspital, University Bern, Freiburgstrasse, 3010, Bern, Switzerland. mamisch@bwh.harvard.edu

    Abstract

    Femoroacetabular impingement due to metaphyseal prominence is associated with the slippage in patients with slipped capital femoral epiphysis (SCFE), but it is unclear whether the changes in femoral metaphysis morphology are associated with range of motion (ROM) changes or type of impingement. We asked whether the femoral head-neck junction morphology influences ROM analysis and type of impingement in addition to the slip angle and the acetabular version. We analyzed in 31 patients with SCFE the relationship between the proximal femoral morphology and limitation in ROM due to impingement based on simulated ROM of preoperative CT data. The ROM was analyzed in relation to degree of slippage, femoral metaphysis morphology, acetabular version, and pathomechanical terms of "impaction" and "inclusion." The ROM in the affected hips was comparable to that in the unaffected hips for mild slippage and decreased for slippage of more than 30 degrees. The limitation correlated with changes in the metaphysic morphology and changed acetabular version. Decreased head-neck offset in hips with slip angles between 30 degrees and 50 degrees had restricted ROM to nearly the same degree as in severe SCFE. Therefore, in addition to the slip angle, the femoral metaphysis morphology should be used as criteria for reconstructive surgery.

    PMID:
    18941860
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC2635459
    Free PMC Article

    Images from this publication.See all images (5) Free text

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