Adhesion of Staphylococcus aureus, Staphylococcus epidermidis, and Pseudomonas aeruginosa onto nanohydroxyapatite as a bone regeneration material

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Liliana Grenho (Author) FEUP; M Manso (Author) Other; Fernando Mendes Monteiro (Author) FEUP; Ferraz, MP (Author) FEUP

Journal

Title: Journal of Biomedical Materials Research - Part A

Vol. 100A

Pages: 1823-1830

ISSN: 1549-3296

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 18 Citations

ISI Web of Science

Scopus - 20 Citations

Scientific classification

FOS: Medical and Health sciences

Other information

Authenticus ID: P-002-8RV

DOI: 10.1002/jbm.a.34139

Abstract (EN): In orthopedics due to the enormous number of surgical procedures involving invasive implant biomaterials, infections have a huge impact in terms of morbidity, mortality, and medical costs. In this study the initial adhesion of several strains namely Staphylococcus aureus, Staphylococcus epidermidis, and Pseudomonas aeruginosa, to nanohydroxyapatite, previously heat-treated at 725 degrees C and 1000 degrees C was assessed. Adherent cells were evaluated by scanning electron microscopy and quantified by confocal laser scanning microscopy and as colony forming units after being released by sonication. The wettability and roughness of samples surfaces were assessed by contact angle measurements and atomic force microscopy, respectively. Nanohydroxyapatite heat-treated at 1000 degrees C appeared to be more resistant to bacterial adhesion, over time, in five of the six tested strains while the clinical strains isolated from orthopedic infections presented superior ability to adhere, as well as better capacity to produce slime. The increase in materials sintering temperature resulted in increased hydrophobicity and roughness; however, other surface features such as the decrease in surface area and on porosity as well as the decrease on zeta potential may be the aspects that contributed to a lower bacterial adhesion on the materials sintered at 1000 degrees C. (C) 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part A, 2012.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8