The repair of articular cartilage defects remains a significant challenge in orthopedic medicine. Hydrogels, three-dimensional polymer networks swollen in water, offer a unique opportunity to generate a functional cartilage substitute. Hydrogels can exhibit similar mechanical, swelling, and lubricating behavior to articular cartilage, and promote the chondrogenic phenotype by encapsulated cells. Hydrogels have been prepared from naturally derived and synthetic polymers, as cell-free implants and as tissue engineering scaffolds, and with controlled degradation profiles and release of stimulatory growth factors. Using hydrogels, cartilage tissue has been engineered in vitro that has similar mechanical properties to native cartilage. This review summarizes the advancements that have been made in determining the potential of hydrogels to replace damaged cartilage or support new tissue formation as a function of specific design parameters, such as the type of polymer, degradation profile, mechanical properties and loading regimen, source of cells, cell-seeding density, controlled release of growth factors, and strategies to cause integration with surrounding tissue. Some key challenges for clinical translation remain, including limited information on the mechanical properties of hydrogel implants or engineered tissue that are necessary to restore joint function, and the lack of emphasis on the ability of an implant to integrate in a stable way with the surrounding tissue. Future studies should address the factors that affect these issues, while using clinically relevant cell sources and rigorous models of repair.
Hydrogels for the Repair of Articular Cartilage Defects
Creators
Kara L. Spiller - Drexel University
Suzanne A. Maher - Hospital for Special Surgery
Anthony M. Lowman - Drexel University
Publication Details
Tissue engineering. Part B, Reviews, v 17(4)
Publisher
Mary Ann Liebert, Inc
Number of pages
19
Grant note
Institute of International Education
National Science Foundation; National Science Foundation (NSF)
UL1RR024996 / NATIONAL CENTER FOR RESEARCH RESOURCES; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Center for Research Resources (NCRR)
UL1 RR024996 / Clinical and Translation Science Center at Weill Cornell Medical College
Widgeon Point Foundation
Resource Type
Journal article
Language
English
Academic Unit
School of Biomedical Engineering, Science, and Health Systems
Web of Science ID
WOS:000292959100006
Scopus ID
2-s2.0-79960653150
Other Identifier
991019168743004721
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Collaboration types
Domestic collaboration
Web of Science research areas
Biotechnology & Applied Microbiology
Cell & Tissue Engineering
Cell Biology
Engineering, Biomedical
Materials Science, Biomaterials
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