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Related Concept Videos

Bone Formation by Endochondral Ossification01:24

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Bone formation, or ossification, begins around the sixth to seventh week of embryonic development. Most bones develop from a cartilaginous template through the process of endochondral ossification. Cartilage formation begins when clusters of mesenchymal cells differentiate into chondrocytes. These chondrocytes proliferate rapidly and secrete an extracellular matrix that becomes encased in a membrane called the perichondrium. The resulting cartilage model provides a template that resembles the...
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Chondrocytes form a temporary cartilaginous model by dividing and secreting a thick gel-like extracellular matrix. Once the chondrocytes undergo programmed cell death, osteoblasts enter the site of the cartilaginous model. The process of replacing the temporary cartilaginous model with bone in an ordered manner is called endochondral ossification. In endochondral ossification, not all of the cartilage is replaced by bone tissue. Some cartilage that performs a protective and supportive function...
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Related Experiment Video

Updated: Oct 14, 2025

Treatment of Osteochondral Defects in the Rabbit's Knee Joint by Implantation of Allogeneic Mesenchymal Stem Cells in Fibrin Clots
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Osteochondral tissue engineering: Perspectives for clinical application and preclinical development.

Chengchong Ai1,2, Yee Han Dave Lee3, Xuan Hao Tan1,2

  • 1Integrative Sciences and Engineering Programme, NUS Graduate School, National University of Singapore, Singapore.

Journal of Orthopaedic Translation
|November 1, 2021
PubMed
Summary
This summary is machine-generated.

Treating osteochondral defects (OCDs) with tissue engineering (TE) scaffolds shows promise but lacks clinical consensus. This review identifies gaps in TE methods and preclinical studies to guide the development of more effective clinical treatments for OCDs.

Keywords:
Animal experimentOsteochondral regenerationScaffoldSubchondral bone

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Area of Science:

  • Biomedical Engineering
  • Regenerative Medicine
  • Orthopedic Surgery

Background:

  • Osteochondral defects (OCDs) present a significant clinical challenge, with scaffold-based treatments offering a promising regenerative approach.
  • Current consensus on the clinical effectiveness of scaffold-based therapies for OCDs is lacking.
  • Existing reviews cover scaffold design and fabrication but insufficiently address the clinical-preclinical research gap.

Purpose of the Study:

  • To bridge the gap between clinical needs and preclinical research in osteochondral tissue engineering (TE).
  • To identify shortcomings in current TE methods and preclinical studies that hinder satisfactory clinical outcomes for OCDs.
  • To provide recommendations for developing more clinically relevant osteochondral implants.

Main Methods:

  • Summarized currently available surgical treatments for OCDs.
  • Conducted a comprehensive review of experimental animal studies in osteochondral TE over the past five years.
  • Analyzed clinical and preclinical failures to identify limitations.

Main Results:

  • Scaffold-based treatments are a promising avenue for osteochondral unit regeneration.
  • A significant gap exists between preclinical research findings and successful clinical translation for OCDs.
  • Current TE methods and animal studies often fail to yield satisfactory clinical outcomes.

Conclusions:

  • Further research is needed to address the limitations in current osteochondral tissue engineering strategies.
  • Recommendations are provided to improve the clinical relevance of implants and guide future research.
  • Bridging the gap between preclinical research and clinical application is crucial for advancing OCD treatment.