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Related Experiment Video

Updated: Mar 1, 2026

Treatment of Osteochondral Defects in the Rabbit's Knee Joint by Implantation of Allogeneic Mesenchymal Stem Cells in Fibrin Clots
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Fresh osteochondral allotransplants: Outcomes, failures and future developments.

M Tschon1, F Veronesi1, S Giannini2

  • 1Laboratory of Preclinical and Surgical Studies, Rizzoli Orthopaedic Institute, via di Barbiano 1/10, 40136 Bologna, Italy.

Injury
|May 29, 2017
PubMed
Summary

Fresh osteochondral allografts offer viable cartilage for joint repair but have variable success rates and risks. Further research is needed to improve outcomes, especially for young patients needing joint regeneration.

Keywords:
AnkleFresh osteochondral allograftsKnee

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Area of Science:

  • Orthopedic surgery
  • Regenerative medicine
  • Biomaterials science

Background:

  • Osteochondral allografts treat various joint conditions, including traumatic lesions and osteoarthritis, particularly in young patients.
  • Fresh allografts provide viable hyaline cartilage, enabling large defect repair in one session without donor morbidity.
  • Potential risks include disease transmission, immune reactions, and limited graft availability.

Purpose of the Study:

  • To review recent studies on fresh osteochondral allografts for knee and ankle regeneration.
  • To report failure rates, side effects, and outcomes of this procedure.
  • To identify limitations and suggest future research directions.

Main Methods:

  • Systematic review of published studies from the last decade.
  • Analysis of patient data for knee and ankle allograft procedures.
  • Categorization of outcomes including success rates, failure rates, and adverse events.

Main Results:

  • Success rates varied: 5.3%–48.3% for ankle (3.3 years follow-up) and 0%–85.7% for knee (7.1 years follow-up).
  • Recorded adverse outcomes included arthritis progression, osteolysis, graft instability, fractures, nonunions, edema, and infections.
  • A significant drawback is the lack of well-designed randomized controlled trials and immunological monitoring.

Conclusions:

  • Fresh osteochondral allografts show promise for joint regeneration, but outcomes are inconsistent.
  • Improvements in study design, immunological assessment, and biomarker development are crucial.
  • Enhancing these factors could establish allografts as a more reliable regenerative procedure for young patients.