Mechanical, Structural, and Biological Characteristics of Polylactide/Wollastonite 3D Printed Scaffolds
Polymers 2022
Rajan Choudhary, Inna Bulygina, Vladislav Lvov, Anna Zimina, Sergey Zhirnov, Evgeny Kolesnikov, Denis Leybo, Natalya Ansimova, Mikhail Kiselevskiy, Maria Kirsanova, Fedor Senatov

The present work aimed to study the synergistic response of bioresorbable polylactide/bioactive wollastonite scaffolds towards mechanical stability, mesenchymal stromal cell colonization, and antibacterial activity in the physiological environment. Wollastonite was synthesized at 800 °C within 2 h by sol-gel combustion method. The surface area was found to be 1.51 m2/g, and Transmission Electron Microscopy (TEM) micrographs indicated the presence of porous structures. Fused deposition modeling was used to prepare 3D-printed polylactide/wollastonite and polylactide/hydroxyapatite scaffolds. Scanning Electron Microscopy (SEM) micrographs confirmed the interconnected porous structure and complex geometry of the scaffolds. The addition of wollastonite decreased the contact angle of the scaffolds. The mechanical testing of scaffolds examined by computational simulation, as well as machine testing, revealed their non-load-bearing capacity. The chemical constituent of the scaffolds was found to influence the attachment response of different cells on their surface. The incorporation of wollastonite effectively reduced live bacterial attachment, whereas the colonization of mesenchymal cells was improved. This observation confirms polylactide/wollastonite scaffold possesses both bactericidal as well as cytocompatible properties. Thus, the risk of peri-implant bacterial film formation can be prevented, and the biological fixation of the scaffold at the defect site can be enhanced by utilizing these composites.


Atslēgas vārdi
3D printing | finite element analysis (FEA) | polymer-matrix composites (PMCs) | porosity/voids | scanning/transmission electron microscopy (STEM)
DOI
10.3390/polym14193932
Hipersaite
https://www.mdpi.com/2073-4360/14/19/3932

Choudhary, R., Bulygina, I., Lvov, V., Zimina, A., Zhirnov, S., Kolesnikov, E., Leybo, D., Ansimova, N., Kiselevskiy, M., Kirsanova, M., Senatov, F. Mechanical, Structural, and Biological Characteristics of Polylactide/Wollastonite 3D Printed Scaffolds. Polymers, 2022, Vol. 14, No. 19, Article number 3932. ISSN 2073-4360. Available from: doi:10.3390/polym14193932

Publikācijas valoda
English (en)
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