期刊
MATERIALS TECHNOLOGY
卷 37, 期 1, 页码 28-35出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/10667857.2020.1806188
关键词
3D printing; chitosan; functionalization; halloysite nanotubes; metal nanoparticles; antimicrobial; zinc; silver
资金
- Louisiana Biomedical Research Network [P20 GM103424-17]
- National Institute of Dental and Craniofacial Research [NIDCR] [U24DE026914]
This study suggests that 3D-printed antimicrobial biomedical devices are a rational solution for preventing implant infections. The use of alkali-treated and functionalized polylactic acid constructs increased their antimicrobial potential.
S. aureus and S. epidermidis are the most common bacteria responsible for causing implant infections. We propose that 3D-printed antimicrobial biomedical devices are a rational solution for the prevention of infection. 3D printed polylactic acid (PLA) constructs were alkali-treated to increase hydrophilicity and functionalized using a suspension of Zinc/HNTs-Ag-Chitosan Oligosaccharide Lactate (ZnHNTs-Ag-COS). PLA constructs were analyzed using scanning electron microscopy and Fourier-transform infrared spectroscopy (FTIR). The antimicrobial potential was assessed using agar diffusion and biofilm assays. The surface of 3D printed PLA constructs were chemically modified to increase hydrophilicity and suspensions of COS-ZnHNTs-Ag were adsorbed on the construct surface. Surface adsorption of ZnHNTs-Ag-COS on PLA printed constructs was determined to be a function of relative pore size. Morphological surface characterization confirmed the presence of the suspension coatings on the constructs, and FTIR analysis confirmed the presence of COS-ZnHNTs-Ag coatings. Growth inhibition studies validated the antimicrobial properties of PLA constructs.
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