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has been cited by the following article:

• TITLE: Fabrication and Characterization of Chitosan Based Injectable Thermosensitive Hydrogels Containing Silica/Calcium Phosphate Nanocomposite Particles

  AUTHORS: Seyed Mohsen Latifi, Christina Tang, Henry J. Donahue

  KEYWORDS: Thermosensitivity, Composite Hydrogel, Bioactive Particles, Rheology, Biocompatibility

  JOURNAL NAME: Journal of Biomaterials and Nanobiotechnology, Vol.12 No.3, July 28, 2021

  ABSTRACT: In this study, the effect of silica/calcium phosphate (SiCaP) nanocomposite particles on the properties of a novel chitosan-based thermosensitive hydrogel system was examined. SiCaP nanocomposite powder was fabricated using a sol-gel method and then used to fabricate nanocomposite hydrogels (Ch- β/7.5SiCaP and Ch-β/15SiCaP) including chitosan and β-glycerophosphate (Ch-β) as a matrix. Results revealed that compared to the Ch-β hydrogel without SiCaP, the presence of SiCaP particles in nanocomposite hydrogels maintained pH stability during the sol-gel transition, accelerated the gelation and improved the stiffness of nanocomposite hydrogels. Gelation time at 37℃ was reduced approximately 75% and stiffness was increased approximately 115%. Both of these changes are attributed to chemical and physical interactions of the SiCaP bioactive particles with chitosan. Furthermore, compared to the Ch-β hydrogel, the presence of SiCaP in the Ch-β/7.5SiCaP nanocomposite hydrogel did not affect biocompatibility negatively, but improved osteoblastic cell differentiation. Our studies suggest that these nanocomposite hydrogels may offer an innovative approach to bone regeneration strategies.