Abstract
The main aim of this work was to study the simultaneous wear-corrosion of titanium (Ti) in the presence of biofilms composed of Streptococcus mutans and Candida albicans. Both organisms were separately grown in specific growth media, and then mixed in a medium supplemented with a high sucrose concentration. Corrosion and tribocorrosion tests were performed after 48 h and 216 h of biofilm growth. Electrochemical corrosion tests indicated a decrease in the corrosion resistance of Ti in the presence of the biofilms although the TiO(2) film presented the characteristics of a compact oxide film. While the open circuit potential of Ti indicated a tendency to corrosion in the presence of the biofilms, tribocorrosion tests revealed a low friction on biofilm covered Ti. The properties of the biofilms were similar to those of the lubricant agents used to decrease the wear rate of materials. However, the pH-lowering promoted by microbial species, can lead to corrosion of Ti-based oral rehabilitation systems.
| Original language | English |
|---|---|
| Pages (from-to) | 471-8 |
| Number of pages | 8 |
| Journal | Biofouling |
| Volume | 26 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - May 2010 |
Keywords
- Biofilms
- Candida albicans/physiology
- Corrosion
- Dental Alloys/chemistry
- Dental Restoration Wear
- Hydrogen-Ion Concentration
- Lubrication
- Streptococcus mutans/physiology
- Titanium/chemistry