Micro-organism and cell viability on antimicrobially modified titanium

Area of Science:

• Biomaterials Science
• Surface Chemistry
• Microbiology

Background:

• Anodized titanium in NaCl solution exhibits both antimicrobial and osteoconductive properties.
• The survival of microorganisms and cells on antimicrobial titanium surfaces requires further investigation.

Purpose of the Study:

• To investigate the viability of adherent microorganisms and osteoblastic cells on antimicrobial titanium.
• To elucidate the mechanism of antimicrobial activity and its effect on cell viability.

Main Methods:

• Titanium anodization in NaCl solution.
• Detection of peroxidation products.
• Assessment of bacterial and osteoblastic cell viability.
• Evaluation of serum protein influence on cell adhesion.

Main Results:

• Antimicrobial titanium efficacy is linked to peroxidation, evidenced by detected peroxidation products and damaged bacterial structures.
• Osteoblastic cell viability is serum protein-dependent, while Streptococcus mutans viability is unaffected by serum proteins.
• The peroxidation effect is localized to the titanium surface.

Conclusions:

• A thin peroxidation barrier on titanium effectively eliminates bacteria.
• Osteoblastic cells survive on antimicrobial titanium due to indirect adhesion via serum proteins.
• Differential adhesion mechanisms dictate cell and bacterial viability on antimicrobial titanium surfaces.