Image-based tissue engineering of a total intervertebral disc implant for restoration of function to the rat lumbar spine. Academic Article uri icon

Overview

MeSH

  • Alginates
  • Animals
  • Collagen
  • Glucuronic Acid
  • Hexuronic Acids
  • Humans
  • Magnetic Resonance Imaging
  • Male
  • Rats
  • Rats, Nude
  • Sheep
  • X-Ray Microtomography

MeSH Major

  • Intervertebral Disc
  • Lumbar Vertebrae
  • Spine
  • Tissue Engineering
  • Total Disc Replacement

abstract

  • Nonbiological total disc replacement is currently being used for the treatment of intervertebral disc (IVD) disease and injury, but these implants are prone to mechanical wear, tear and possible dislodgement. Recently, tissue-engineered total disc replacement (TE-TDR) has been investigated as a possible alternative to more fully replicate the native IVD properties. However, the performance of TE-TDRs has not been studied in the native disc space. In this study, MRI and microcomputed tomography imaging of the rat spine were used to design a collagen (annulus fibrosus)/alginate (nucleus pulposus) TE-TDR to a high degree of geometric accuracy, with less than 10% difference between TE-TDR and the native disc dimensions. Image-based TE-TDR implants were then inserted into the L4/L5 disc space of athymic rats (n = 5) and maintained for 16 weeks. The disc space was fully or partially maintained in three of five animals and proteoglycan and collagen histology staining was similar in composition to the native disc. In addition, good integration was observed between TE-TDR and the vertebral bodies, as well as remnant native IVD tissue. Overall, this study provides evidence that TE-TDR strategies may yield a clinically viable treatment for diseased or injured IVD. Copyright © 2011 John Wiley & Sons, Ltd.

publication date

  • March 2012

has subject area

  • Alginates
  • Animals
  • Collagen
  • Glucuronic Acid
  • Hexuronic Acids
  • Humans
  • Intervertebral Disc
  • Lumbar Vertebrae
  • Magnetic Resonance Imaging
  • Male
  • Rats
  • Rats, Nude
  • Sheep
  • Spine
  • Tissue Engineering
  • Total Disc Replacement
  • X-Ray Microtomography

Research

keywords

  • Journal Article

Identity

Language

  • eng

Digital Object Identifier (DOI)

  • 10.1002/nbm.1651

PubMed ID

  • 21387440

Additional Document Info

start page

  • 443

end page

  • 451

volume

  • 25

number

  • 3