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Cartilage Repair Using Hydrogels: A Critical Review of in Vivo Experimental Designs
C A Vilela1,2,3,4, C Correia5, J M Oliveira1,2
13B's Research Group, University of Minho, Guimarães, Portugal.
ACS Biomaterials Science & Engineering
|January 15, 2021
Summary
This review of cartilage repair studies found that while gels and hydrogels show promise, many studies lack clear evidence of hyaline-like cartilage formation. Future research should address design limitations for better human application outcomes.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Orthopedic Surgery
Background:
- Cartilage defects represent a significant clinical challenge.
- Gels and hydrogels are increasingly investigated as scaffolds for cartilage tissue engineering.
- In vivo studies are crucial for evaluating the efficacy of these biomaterials.
Purpose of the Study:
- To review and analyze the outcomes and technical aspects of in vivo studies using gels and hydrogels for cartilage repair.
- To identify limitations in study designs and discuss potential for human application.
Main Methods:
- Systematic literature search of PubMed for original research publications from 2002 to 2015.
- Analysis of 115 identified studies focusing on cartilage repair using gels and hydrogels.
- Evaluation of study outcomes, lesion models, scaffold composition (cell-free, growth factors), and reported cartilage formation.
Main Results:
- A majority of studies utilized rabbit acute full thickness trochlear defects, often with composite scaffolds.
- 35% of scaffolds were cell-free, and 71% did not employ growth factors.
- 3 studies showed no significant improvement, and 18 lacked clear evidence of hyaline-like cartilage formation.
Conclusions:
- Gels and hydrogels are frequently used in cartilage repair research, but study designs often have limitations.
- Further refinement of experimental designs is needed to improve the translation of findings to clinical applications.
- This review provides insights for optimizing future in vivo studies on hydrogel-based cartilage regeneration.
