Journal
THERANOSTICS
Volume 10, Issue 21, Pages 9843-9864Publisher
IVYSPRING INT PUBL
DOI: 10.7150/thno.46450
Keywords
injectable hydrogels; cartilage repair; polymers; gelation
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Funding
- National Natural Science Foundation of China [81871607]
- Natural Science Foundation of Shaanxi Province [2020JM-386, 2018JM3042]
- Innovation Capability Support Program of Shaanxi [2020TD-042]
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Cartilage damage is still a threat to human beings, yet there is currently no treatment available to fully restore the function of cartilage. Recently, due to their unique structures and properties, injectable hydrogels have been widely studied and have exhibited high potential for applications in therapeutic areas, especially in cartilage repair. In this review, we briefly introduce the properties of cartilage, some articular cartilage injuries, and now available treatment strategies. Afterwards, we propose the functional and fundamental requirements of injectable hydrogels in cartilage tissue engineering, as well as the main advantages of injectable hydrogels as a therapy for cartilage damage, including strong plasticity and excellent biocompatibility. Moreover, we comprehensively summarize the polymers, cells, and bioactive molecules regularly used in the fabrication of injectable hydrogels, with two kinds of gelation, i.e., physical and chemical crosslinking, which ensure the excellent design of injectable hydrogels for cartilage repair. We also include novel hybrid injectable hydrogels combined with nanoparticles. Finally, we conclude with the advances of this clinical application and the challenges of injectable hydrogels used in cartilage repair.
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