Abstract
In order to obtain hydrogel matrices for bone tissue engineering, the process of formation of highly filled alginate-calcium phosphate structures by 3D printing was developed. Optimal conditions for the formation of three-dimensional structures from Ca2+ crosslinked alginate hydrogels and highly filled alginate compositions with fine (5–30 μm) α-tricalcium phosphate (TCP) were determined. Comparative analysis of physicomechanical properties of crosslinked alginate hydrogels showed lower strength and higher elastic modulus of the TCP-filled composite in comparison with pure hydrogel. The difference between the mechanical characteristics of the filled and pure gels increases with the crosslinking density. It was found that, because of the significant content of the mineral dispersed phase, the α-TCP-filled hydrogel does not shrink during crosslinking, unlike pure alginate hydrogel. Using cultures of human umbilical cord mesenchymal stem cells, it was shown in vitro that all the studied samples of both pure and highly filled composite alginate matrices with α-TCP do not have short-term cytotoxic effects.
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Funding
This work was supported by the Ministry of Science and Higher Education of Russia in the framework of the work on the State Assignment of the Federal Research Center Crystallography and Photonics of the Russian Academy of Sciences regarding the development of 3D printing processes for hydrogel matrices and the Russian Foundation for Basic Research (project no. 18-29-11081_mk) regarding the fabrication and investigation of compositions based on sodium alginate and fine tricalcium phosphate.
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Translated by K. Lazarev
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Mironov, A.V., Mironova, O.A., Mariyanats, A.O. et al. Highly Filled Compositions Based on Alginate Gel and Fine Tricalcium Phosphate for 3D Printing of Tissue-Engineered Matrices. Inorg. Mater. Appl. Res. 11, 1137–1143 (2020). https://doi.org/10.1134/S2075113320050214
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DOI: https://doi.org/10.1134/S2075113320050214