A comprehensive study of physical parameters, biomechanical properties, and statistical correlations of iliac crest bone wedges used in spinal fusion surgery: II mechanical properties and correlation with physical parameters

Lloyd Wolfinbarger, Yongxing Zhang, Bao Ling T. Adam, Vicki Sutherland, Diana Homsi, Bud Bramet

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Iliac crest wedges have been the most frequently used bone graft in spinal fusion procedures since the 1970s. Physical parameters and correlations among physical parameters of allogeneic iliac crest wedges have been described in part I of this series. This article discusses the mechanical properties, as well as their correlations with physical parameters, of iliac crest wedges. A total of 250 frozen-thawed, freeze-dried, and rehydrated iliac crest wedges were used in this study. The axial load- bearing capacities for wedges in the three subgroups showed no statistically significant differences, however, rehydrated wedges appeared to have the greatest load bearing capacity and compressive strength. In addition, rehydrated wedges were more deformable than either the frozen-thawed or freeze-dried wedges. Based on biomechanical properties, it is suggested that rehydrated (1 hour in vacuo), or frozen-thawed iliac crest wedge should be used in spinal fusion procedures, and the direct clinical application of nonrehydrated freeze-dried wedges should be avoided.

Original languageEnglish (US)
Pages (from-to)284-295
Number of pages12
JournalSpine
Volume19
Issue number3
DOIs
StatePublished - Feb 1994
Externally publishedYes

Keywords

  • Bone biomechanics
  • Iliac crest wedge
  • Spine fusion

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Clinical Neurology

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