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- W2801921614 abstract "Microsphere sintering method was used to fabricate bone tissue engineering scaffolds made of polycaprolactone (PCL)/bioactive glass 58S5Z (58S modified with 5 wt% Zinc). First, the effect of PCL/58S5Z ratio on the mechanical properties (elastic modulus and yield strength) was investigated. It was found that samples with 5 wt% 58S5Z (named 5%BG) had the highest elastic modulus and yield strength among all samples, i.e., with 0, 5, 10, and 20 wt% bioactive glass. Then, considering the importance of viscoelastic properties of bone, the viscoelastic behavior of 0%BG (scaffold with only PCL) and 5%BG samples was determined by performing compressive stress relaxation test and subsequently a Generalized Maxwell model was developed. Findings indicated a similar amount and pattern of predicted storage and loss moduli and loss factor of the composite scaffolds to those of the bone. In the next step, the analysis of biological behavior of the scaffolds using MTT assay, DAPI and Alizarin red staining demonstrated that 5%BG scaffolds had higher in vitro cell viability and bone formation compared to 0%BG ones. Furthermore, in vivo study employing H&E staining of the scaffolds implanted in rats' calvarium for 50 days, confirmed the earlier findings and showed that 5%BG-filled defects had higher and more uniform bone formation compared to both 0%BG-filled and empty defects." @default.
- W2801921614 created "2018-05-17" @default.
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- W2801921614 date "2018-09-01" @default.
- W2801921614 modified "2023-10-16" @default.
- W2801921614 title "Mechanical, material, and biological study of a PCL/bioactive glass bone scaffold: Importance of viscoelasticity" @default.
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- W2801921614 doi "https://doi.org/10.1016/j.msec.2018.04.080" @default.
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