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Coronal alignment of the lower limb.

Jean-Yves Jenny1, Cyril Boeri, Laurent Ballonzoli

  • 1Centre de Traumatologie et d'Orthopédie, 10 avenue Baumann, 67400 Illkirch, France. jean-yves.jenny@evc.net

Acta Orthopaedica
|September 15, 2005
PubMed
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Lower limb alignment varies more than previously thought, impacting knee reconstruction. This study highlights the need for personalized surgical approaches based on individual patient anatomy.

Area of Science:

  • Orthopedic surgery
  • Radiographic analysis
  • Human anatomy

Background:

  • Coronal alignment of the lower limb is crucial for successful knee reconstruction.
  • Defining normal lower limb alignment is challenging due to significant individual anatomical variation.
  • This study hypothesized that radiographic assessment reveals greater anatomical variation in normal individuals than commonly accepted.

Purpose of the Study:

  • To quantify the variation in normal coronal lower limb alignment.
  • To assess the femorotibial angle, distal femoral condyle orientation, and proximal tibial condyle orientation.
  • To determine if current definitions of normal alignment are too narrow.

Main Methods:

  • Anteroposterior long-leg radiographs were taken of 100 Caucasian patients without knee abnormalities.

Related Experiment Videos

  • Key measurements included the femorotibial angle and coronal orientation of femoral and tibial condyles.
  • Measurements were consistently performed by a single, experienced knee surgeon.

    • Main Results:

    • Observed mean values aligned with typical Caucasian population data.
    • A significant discrepancy was found, with only 15-20% of cases matching established mean values for specific measurements.
    • Extreme variation was noted across all measured angles, evidenced by standard deviations exceeding mean values.

    Conclusions:

    • The anatomical variation in lower limb axes is considerably wider than conventionally believed.
    • Current knee reconstruction practices may benefit from incorporating patient-specific knee axes.
    • Personalized surgical strategies are recommended to account for individual anatomical variations.