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Related Experiment Videos

Danger zone of the acetabulum.

N A Ebraheim1, J Waldrop, R A Yeasting

  • 1Department of Orthopaedic Surgery, Medical College of Ohio, Toledo 43699.

Journal of Orthopaedic Trauma
|January 1, 1992
PubMed
Summary

Surgeons can avoid hip joint injury during acetabular fracture fixation by understanding the posterior column's "danger zone." This study identified safe screw placement pathways, crucial for posterior wall and column fracture treatment.

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Area of Science:

  • Orthopedic Surgery
  • Anatomical Studies
  • Surgical Safety

Background:

  • The acetabulum's posterior wall and column are critical for hip stability.
  • The "danger zone" poses a risk of hip joint violation during screw fixation of posterior acetabular fractures.
  • Current fixation techniques frequently involve this high-risk anatomical area.

Purpose of the Study:

  • To precisely define the anatomical configuration of the acetabular "danger zone."
  • To identify safe pathways for screw placement in posterior column fractures.
  • To reduce the risk of iatrogenic hip joint violation during acetabular fracture fixation.

Main Methods:

  • Cadaveric acetabulum cross-section analysis (1-cm thick) perpendicular to the posterior column.
  • Projection of the medial acetabular boundary onto the posterior column for spatial analysis.

Related Experiment Videos

  • Evaluation of screw trajectory and entry points relative to anatomical landmarks and the "danger zone."

    • Main Results:

    • Screws placed at the "danger zone" margin and perpendicular to the posterior column violated the hip joint.
    • Safe screw placement pathways were identified through cross-section analysis.
    • 4.5 mm cortical screws placed 2 cm and 3 cm medial to the lateral acetabular margin at 45 and 15 degrees medially, respectively, did not violate the hip joint.

    Conclusions:

    • Accurate anatomical understanding of the "danger zone" is essential for safe screw placement.
    • Defined safe pathways minimize the risk of hip joint violation in posterior acetabular fracture fixation.
    • Computed tomography (CT) scans provide valuable information for surgical planning and screw placement in the posterior column.