Microbiological investigations of oxygen plasma treated parylene C surfaces for metal implant coating
2015 (English)In: Materials science & engineering. C, biomimetic materials, sensors and systems, ISSN 0928-4931, Vol. 52, 273-281 p.Article in journal (Refereed) Published
Parylene C surface was modified by the use of oxygen plasma treatment and characterized by microscopic and surface-sensitive techniques (E-SEM, AFM, XPS, LDI-TOF-MS, contact angle). The influence of the treatment on surface properties was investigated by calculations of surface free energy (Owens-Wendt method). Moreover, early adhesion (Culture Plate Method, Optical Microscopy Test) and biofilm formation ability (Cristal Violet Assay) on the parylene C surface was investigated. The bacteria strains which are common causative agents of medical device-associated infections (Staphylococcus aureus, Staphylococcus epidermidis and Pseudomonas aeruginosa - reference strains and clinical isolates) were used. It was concluded that chemical (oxygen insertion) and physical (nanotopography generation) changes, have a significant impact on the biocompatibility in terms of increased hydrophilicity (θw of unmodified sample = 88° ± 2°, θw of 60 min modified sample = 17.6° ± 0.8°) and surface free energy (SFE of unmodified sample = 42.4 mJ/m2, and for 60 min modified sample = 70.1 mJ/m2). At the same time, no statistical effect on biofilm production and bacteria attachment to the modified surface of any of the tested strains was observed.
Place, publisher, year, edition, pages
2015. Vol. 52, 273-281 p.
Implant coating, Microbiological evaluation, Oxygen plasma, Parylene C
IdentifiersURN: urn:nbn:se:kth:diva-166922DOI: 10.1016/j.msec.2015.03.060ISI: 000357751100036ScopusID: 2-s2.0-84926202694OAI: oai:DiVA.org:kth-166922DiVA: diva2:815082
QC 201505292015-05-292015-05-212015-08-10Bibliographically approved