Mechanical strength of bone allografts subjected to chemical sterilization and other terminal processing methods

Mark M. Mikhael, Paul M. Huddleston, Mark E. Zobitz, Quingshan Chen, Kristin D. Zhao, Kai Nan An

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


Infectious disease transmission through the use of human donor allografts can be a catastrophic complication in an otherwise straightforward surgical procedure. The use of bone allograft in reconstructive orthopedic surgeries is increasing, yet severe complications, including death, can result if the transplanted tissues transmit a communicable disease to the tissue recipient. The BioCleanse® tissue sterilization process is a fully automated, low-temperature chemical sterilization process that renders allograft tissue sterile. The purpose of this study was to evaluate the effect of a chemical tissue sterilization process on the mechanical strength of cortical bone allografts prior to implantation. Cylindrical cortical bone specimens were harvested from seven human cadaver donors and treated either by: chemical sterilization alone; chemical sterilization and terminal sterilization by gamma irradiation; chemical sterilization, lyophilization, terminal sterilization by STERRAD and rehydration; or untreated. The specimens were tested to failure in axial compression, diametral compression, shear, or bending. There were no significant differences in ultimate stress, strain, or fracture energy between the chemically sterilized and control groups in any of the testing modes.

Original languageEnglish (US)
Pages (from-to)2816-2820
Number of pages5
JournalJournal of Biomechanics
Issue number13
StatePublished - Sep 18 2008


  • BioCleanse
  • Bone allograft
  • Chemical sterilization
  • Gamma irradiation
  • Mechanical strength

ASJC Scopus subject areas

  • Biophysics
  • Biomedical Engineering
  • Orthopedics and Sports Medicine
  • Rehabilitation


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