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Related Experiment Videos

Anatomic considerations for posterior iliac bone harvesting

R Xu1, N A Ebraheim, R A Yeasting

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

Spine
|May 1, 1996
PubMed
Summary

The safest zone for posterior ilium bone grafting is Zone 1, offering a quantitative guide for surgeons. Harvesting from Zones 2 or 3 may yield more bone but increases risks to vital structures.

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Area of Science:

  • Anatomy
  • Orthopedic Surgery
  • Bone Grafting

Background:

  • The posterior ilium is a common bone graft donor site, but complications like pain and neurovascular injury persist.
  • Quantitative anatomical studies of the posterior ilium for safe graft harvesting are limited.

Purpose of the Study:

  • To quantitatively define a safe zone for bone graft harvesting from the posterior ilium.
  • To identify critical anatomical landmarks and measure distances to vital structures.

Main Methods:

  • Analysis of bony features and vital structures in six cadavers and 30 dry iliac specimens.
  • Measurement of distances from the posterior superior iliac spine to superior cluneal nerves and superior gluteal vessels.
  • Division of the posterior iliac region into three zones for dimensional analysis.

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Main Results:

  • The posterior superior iliac spine to superior cluneal nerves distance averaged 68.8 mm.
  • The posterior superior iliac spine to superior gluteal vessels distance averaged 62.4 mm.
  • Zone 1 dimensions (width, height, thickness) were 34 x 27.8 x 17.1 mm, identified as the safest area.

Conclusions:

  • Zone 1 of the posterior ilium is the optimal site for bone graft harvesting, balancing safety and graft quantity.
  • Zones 2 and 3 offer greater bone yield but carry increased risks of injury to the sacroiliac joint and superior gluteal vessels.