Dental Materials Journal
Online ISSN : 1881-1361
Print ISSN : 0287-4547
ISSN-L : 0287-4547
Original Paper
Protein adsorption and cell adhesion behavior of engineering plastics plasticized by supercritical carbon dioxide
Masaki WATANABEHanako MAEDAYoshihide HASHIMOTOTsuyoshi KIMURAAkio KISHIDA
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2020 Volume 39 Issue 6 Pages 1033-1038

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Abstract

We aimed to evaluate the biological properties of engineering plastics (PC, PSU, PAR) processed using supercritical carbon dioxide (scCO2). Conventional mold process was used to prepare disk-shaped samples that were then plasticized by scCO2 at temperatures lower than the glass transition temperature (Tg) of the polymers. Surface roughness, contact angle, and amount of adsorbed protein on the surface were increased after treatment. The surface roughness of PC was significantly changed by scCO2 treatment. Cell adhesion and proliferation changed according to the differences in surface roughness. Initially, the cell adhesion decreased in all scCO2-treated polymers. At 3 day, the cell proliferation on scCO2-treated PC was lower than that on non-treated PC, while that on treated and non-treated PSU and PAR samples remained unaltered. These results suggest that when supercritical treatment is performed under conditions that affect the surface properties of the material, we should consider that cell adhesion and proliferation may change.

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© 2020 The Japanese Society for Dental Materials and Devices
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