3D printing of complicated GelMA-coated Alginate/Tri-calcium silicate scaffold for accelerated bone regeneration

Copyright © 2022. Published by Elsevier B.V..

Polymer-based composite scaffolds are an attractive class of biomaterials due to their suitable physical and mechanical performance as well as appropriate biological properties. When such composites contain osteoinductive ceramic nanopowders, it is possible, in principle, to stimulate the seeded cells to differentiate into osteoblasts. However, reproducibly fabricating and developing an appropriate niche for cells' activities in three-dimensional (3D) scaffolds remains a challenge using conventional fabrication techniques. Additive manufacturing provides a new strategy for the fabrication of complex 3D structures. Here, an extrusion-based 3D printing method was used to fabricate the Alginate (Alg)/Tri-calcium silicate (C3S) bone scaffolds. To improve physical and biological attributes, scaffolds were coated with gelatin methacryloyl (GelMA), a biocompatible viscose hydrogel. Conducting a combination of experimental techniques and molecular dynamics simulations, it is found that the composition ratio of Alg/C3S governs intermolecular interactions among the polymer and ceramic, affecting the product performance. Investigating the effects of various C3S amounts in the bioinks, the 90/10 composition ratio of Alg/C3S is known as the optimum content in developed bioinks. Accordingly, the printability of high-viscosity inks is boosted by improved hierarchical interactions among assemblies, which in turn leads to better nanoscale alignment in extruded macroscopic filaments. Conducting multiple tests on specimens, the GelMA-coated Alg/C3S scaffolds (with a composition ratio of 90/10) were shown to have improved mechanical qualities and cell adhesion, spreading, proliferation, and osteogenic differentiation, compared to the bare scaffolds, making them better candidates for further future research. Overall, the in-silico and in vitro studies of GelMA-coated 3D-printed Alg/C3S scaffolds open new aspects for biomaterials aimed at the regeneration of large- and complicated-bone defects through modifying the extrusion-based 3D-printed constructs.

Medienart:

E-Artikel

Erscheinungsjahr:

2023

Erschienen:

2023

Enthalten in:

Zur Gesamtaufnahme - volume:229

Enthalten in:

International journal of biological macromolecules - 229(2023) vom: 28. Feb., Seite 636-653

Sprache:

Englisch

Beteiligte Personen:

Beheshtizadeh, Nima [VerfasserIn]
Farzin, Ali [VerfasserIn]
Rezvantalab, Sima [VerfasserIn]
Pazhouhnia, Zahra [VerfasserIn]
Lotfibakhshaiesh, Nasrin [VerfasserIn]
Ai, Jafar [VerfasserIn]
Noori, Alireza [VerfasserIn]
Azami, Mahmoud [VerfasserIn]

Links:

Volltext

Themen:

3D printing
9000-70-8
Alginates
Biocompatible Materials
Bone tissue engineering
Calcium silicate
GelMA
Gelatin
Gelatin methacryloyl
Hydrogels
Journal Article
Molecular dynamics simulations
S4255P4G5M
Tri-calcium silicate

Anmerkungen:

Date Completed 03.02.2023

Date Revised 03.02.2023

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.ijbiomac.2022.12.267

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM350979766