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Reviews

Current Intelligent Injectable Hydrogels for In Situ Articular Cartilage Regeneration

, , , , , , , , & show all
Pages 203-225 | Received 09 May 2019, Accepted 13 Oct 2019, Published online: 28 Oct 2019
 

Abstract

A high number of sport injuries result in damage to articular cartilage, a tissue type with poor self-healing capacity. Articular cartilage tissue is a sophisticated hydrogel, which contains 80% water and possesses strong mechanical properties. For this reason, synthetic hydrogels are thought to be an optimal material for cartilage regeneration. In the last decade, more than 2,000 research papers pertaining to “hydrogel and cartilage” have been published. Due to its biomimetic properties and user-friendly nature, especially in the field of minimal invasive surgery, intelligent injectable hydrogel have gradually become a focal point in cartilage research in recent years. In this review, we systematically summarize current “state-of-the-art” manufacture technologies of injectable hydrogels including ion-induced, thermo-induced, non-induced chemical, and light-induced crosslinking. We also review current strategies for designing intelligent injectable hydrogels, such as component-based, mechanical property-based and structure-based intelligent design to simulate the natural articular cartilage. Lastly, the applications of intelligent injectable hydrogels for cartilage regeneration are presented, and their outlooks for future clinical translation is dicussed.

Additional information

Funding

This work is supported by the National Key R&D Program of China (2017YFA0104900), and the NSFC grants (31830029, 81630065, 81672162). The authors thank the Mr. Yi Hong, Miss Enateri V Alakpa and Miss Febriyani F.R. Damanik.

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