Microbial Adhesion and Biofilm Formation on Bioactive Surfaces of Ti-35Nb-7Zr-5Ta Alloy Created by Anodization

Autor(es)

Fais, Laiza Maria Grassi ^[1] ; de Sales Leite, Luana ^[1] ; Reis, Barbara Araujo dos ^[2] ; Ribeiro, Ana Lucia Roselino ^[3] ; Vaz, Luis Geraldo ^{[1, 2]} ; Klein, Marlise Inez ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Sch Dent, Dept Dent Mat & Prosthodont, BR-14800900 Araraquara - Brazil

^[2] Sao Paulo State Univ UNESP, Sch Dent, Dept Diag & Surg, BR-14800900 Araraquara - Brazil

^[3] Ctr Univ Tocantinense Presidente Antonio Carlos U, Fac Ciencias Tocantins, BR-77816540 Araguaina - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MICROORGANISMS; v. 9, n. 10 OCT 2021.
• Citações Web of Science: 0

Resumo

This study evaluated the microbial colonization (adhesion and biofilm) on modified surfaces of a titanium alloy, Ti-35Nb-7Zr-5Ta, anodized with Ca and P or F ions, with and without silver deposition. The chemical composition, surface topography, roughness (Ra), and surface free energy were evaluated before and after the surface modifications (anodizing). Adhesion and biofilm formation on saliva-coated discs by primary colonizing species (Streptococcus sanguinis, Streptococcus gordonii, Actinomyces naeslundii) and a periodontal pathogen (Porphyromonas gingivalis) were assessed. The surfaces of titanium alloys were modified after anodizing with volcano-shaped micropores with Ca and P or nanosized with F, both with further silver deposition. There was an increase in the Ra values after micropores formation; CaP surfaces became more hydrophilic than other surfaces, showing the highest polar component. For adhesion, no difference was detected for S. gordonii on all surfaces, and some differences were observed for the other three species. No differences were found for biofilm formation per species on all surfaces. However, S. gordonii biofilm counts on distinct surfaces were lower than S. sanguinis, A. naeslundii, and P. gingivalis on some surfaces. Therefore, anodized Ti-35Nb-7Zr-5Ta affected microbial adhesion and subsequent biofilm, but silver deposition did not hinder the colonization of these microorganisms.</p> (AU)

• Processo FAPESP: 17/08192-7 - Caracterização superficial e propriedades eletroquímicas de superfícies multifuncionais de ligas de titânio
• Beneficiário: Luis Geraldo Vaz
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/08021-5 - Análise da expressão de genes de Streptococcus mutans em biofilme misto
• Beneficiário: Luana de Sales Leite
• Modalidade de apoio: Bolsas no Brasil - Programa Capacitação - Treinamento Técnico