Material properties of fresh cold-stored allografts for osteochondral defects at 1 year. Academic Article uri icon

Overview

abstract

  • Little is known about the long-term properties of fresh cold-stored osteochondral allograft tissue. We hypothesized fresh cold-stored tissue would yield superior material properties in an in vivo ovine model compared to those using freeze-thawed acellular grafts. In addition, we speculated that a long storage time would yield less successful grafts. We created 10-mm defects in medial femoral condyles of 20 sheep. Defects were reconstructed with allograft plugs stored at 4 degrees C for 1, 14, and 42 days; control specimens were freeze-thawed or defect-only. At 52 weeks, animals were euthanized and retrieved grafts were analyzed for cell viability, gross morphology, histologic grade, and biomechanical and biochemical analysis. Explanted cold-stored tissue had superior histologic scores over freeze-thawed and defect-only grafts. Specimens stored for 1 and 42 days had higher equilibrium moduli and proteoglycan content than freeze-thawed specimens. We observed no difference among any of the cold-stored specimens for chondrocyte viability, histology, equilibrium aggregate modulus, proteoglycan content, or hypotonic swelling. Reconstructing cartilage defects with cold-stored allograft resulted in superior histologic and biomechanical properties compared with acellular freeze-thawed specimens; however, storage time did not appear to be a critical factor in the success of the transplanted allograft.

publication date

  • June 5, 2008

Research

keywords

  • Cartilage, Articular
  • Chondrocytes
  • Tissue Preservation

Identity

PubMed Central ID

  • PMC2584258

Scopus Document Identifier

  • 48849097326

Digital Object Identifier (DOI)

  • 10.1177/0363546507305017

PubMed ID

  • 18528743

Additional Document Info

volume

  • 466

issue

  • 8