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Related Experiment Videos

Spinal fixation device: a 6-year postimplantation study.

Mira Mohanty1, Sulekha Baby, K V Menon

  • 1Division of Implant Biology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala-695012, India. mira@sctimst.ker.nic.in

Journal of Biomaterials Applications
|November 19, 2003
PubMed
Summary
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Long-term implantation of spinal fixation devices can cause chronic inflammation and metal debris in surrounding tissues. Macrophages and neovascularization were observed, even in asymptomatic individuals, highlighting potential tissue responses to medical implants.

Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Orthopedic Surgery

Background:

  • Spinal fixation devices are used to stabilize the spine during fusion.
  • Assessing long-term tissue response to implanted medical devices is crucial for patient safety.
  • Revision surgery necessitated the removal of a spinal fixation device after 6 years.

Observation:

  • Scanning electron microscopy (SEM) revealed significant changes in the surface topography of the retrieved spinal fixation device components.
  • Histological examination of adjacent tissues showed a chronic inflammatory response.
  • Metal debris was observed within the surrounding tissue.

Findings:

  • Immunohistochemistry identified macrophages as the predominant immune cells in the tissue.

Related Experiment Videos

  • Abundant neovascularization (new blood vessel formation) was present.
  • The presence of macrophages adjacent to the implant in an asymptomatic patient is a noteworthy finding.

    • Implications:

    • This study provides insights into the chronic biological response to spinal fixation devices.
    • Understanding tissue-implant interactions is essential for designing next-generation orthopedic implants.
    • The findings suggest that subclinical inflammatory responses may occur even without overt symptoms.