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Femoral anteversion: assessment based on function axes.

Y Yoshioka, T D Cooke

    Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society
    |January 1, 1987
    PubMed
    Summary

    This study assessed femoral anteversion in cadavers using a 3D system. The average anteversion was 7.4 degrees, with significant individual variations observed.

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    Area of Science:

    • Anatomy
    • Biomechanics
    • Orthopedics

    Background:

    • Femoral anteversion is a critical parameter in hip biomechanics.
    • Accurate measurement of femoral anteversion is essential for diagnosing and treating various hip conditions.

    Purpose of the Study:

    • To conduct a clinically oriented anatomical assessment of femoral anteversion.
    • To establish a reliable 3D measurement method for femoral anteversion.

    Main Methods:

    • Utilized a 3D reference system based on functional axes of the femur in 32 cadavers (61-89 years).
    • Defined long and transverse axes using specific anatomical landmarks (femoral head, PCL attachment, transepicondylar line).
    • Measured anteversion as the angle between the femoral head-neck line and the transverse axis.

    Main Results:

    • The mean femoral anteversion was 7.4 degrees (range: -10.8 to 22.1 degrees).
    • No significant differences in mean anteversion were found between sexes or sides.
    • Significant variations in anteversion were observed within individuals, with retroversion present in 12.5% of specimens.
    • No correlation was found between femoral anteversion and knee rotational geometry.

    Conclusions:

    • The 3D functional axis method provides a reliable assessment of femoral anteversion.
    • Significant individual variability in femoral anteversion exists, highlighting the need for patient-specific analysis.
    • Retroversion is a notable finding in a subset of the elderly population.

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