A novel antibacterial modification treatment of titanium capable to improve osseointegration

Cinzia Della Valle, Livia Visai, Matteo Santin, Lberto Cigada, Gabriele Candiani, Daniele Pezzoli, Carla Renata Arciola, Marcello Imbriani, Roberto Chiesa

Research output: Contribution to journalArticle

Abstract

Background: Among the different causes of orthopedic and dental implant failure, infection remains the most serious and devastating complication associated with biomaterial devices. Purpose: The aim of this study was to develop an innovative osteointegrative and antibacterial biomimetic coating on titanium and to perform a chemical-physical and in vitro biological characterization of the coating using the SAOS-2 cell line. We also studied the antibacterial properties of the coating against both Gram-positive and Gram-negative bacteria strains. Methods: An electrochemical solution containing silicon, calcium, phosphorous, sodium, and silver nanoparticles was used to obtain the antibacterial by Anodic Spark Deposition (ASD) treatment. Surface morphology was characterized using SEM and laser profilometry. A qualitative analysis of the chemical composition of the coating was assessed by EDS. The adhesion properties of the coating to the titanium bulk were performed with a 3-point bending test. SAOS-2 osteoblastic cell line spreading and morphology and viability were investigated. The bacterial adhesion and the antibacterial properties were investigated after 3 h and 24 h of incubation with Streptococcus mutans, Streptococcus epidermidis, and Escherichia coli bacterial strains. Results: The proposed anodization treatment created a chemically and morphologically modified, adherent titanium oxide layer, characterized by a microporous morphology enriched by calcium, silicon, phosphorous, and silver. The preliminary biological characterization showed optimal SAOS-2 cell adhesion and proliferation as well as a strong antibacterial effect. Conclusions: Based on the results of this study, we believe that this novel biomimetic and antibacterial treatment hold promise for enhancing osteointegration while conferring strong antibacterial properties to titanium.

Original languageEnglish
Pages (from-to)864-875
Number of pages12
JournalInternational Journal of Artificial Organs
Volume35
Issue number10
DOIs
Publication statusPublished - 2012

Keywords

  • Antibacterial activity
  • Biomimetic
  • Escherichia coli
  • Silicon
  • Silver nanoparticles
  • Staphylococcus epidermidis
  • Streptococcus mutans

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering
  • Bioengineering
  • Medicine (miscellaneous)

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