Ultraviolet Light Treatment of Titanium Suppresses Human Oral Bacterial Attachment and Biofilm Formation: A Short-Term In Vitro Study

The International Journal of Oral & Maxillofacial Implants
Manabu IshijimaTakahiro Ogawa

Abstract

Antibacterial dental implants and related prosthetic components could help to reduce infection and prevent peri-implantitis. The purpose of this study was to determine the effect of ultraviolet (UV) light treatment of titanium on biofilm formation of human oral bacteria. Machine-prepared commercially pure titanium disks were treated with UV light for 12 minutes. Human oral bacteria were seeded onto untreated and UV-treated disks. Early bacterial attachment to titanium was assessed at 12 hours. Surface topography of initial biofilms was evaluated by 3D scanning electron microscopy at 24 hours. The quantity and morphology of subsequent colony development and biofilm formation were examined by confocal laser scanning microscopy for up to 7 days. Throughout the time course, significantly fewer bacterial cells attached to UV-treated titanium surfaces compared to untreated ones. While biofilm developed rapidly to a final thickness of about 16 μm by day 3 on untreated titanium, on UV-treated surfaces it remained below 8 μm, even at day 7. Similarly, UV treatment resulted in 70% less exopolysaccharides (EPS) volume than on untreated surfaces at day 7. This is consistent with the finding that EPS production per cell was significantly lo...Continue Reading

Citations

Oct 3, 2019·Brazilian Oral Research·João PingueiroBruno Bueno-Silva

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