EdenteV2, Main, Exploration, bibRecord, 002186

Synergetic inactivation of Staphylococcus epidermidis and Streptococcus mutansin a TiO2/H2O2/UV system

Identifieur interne : 002186 ( Main/Exploration ); précédent : 002185; suivant : 002187

Synergetic inactivation of Staphylococcus epidermidis and Streptococcus mutansin a TiO2/H2O2/UV system

Auteurs : Erik Unosson [Suède] ; Eleni K. Tsekoura [Suède] ; H Kan Engqvist [Suède] ; Ken Welch [Suède]

Source :

Biomatter [ 2159-2527 ] ; 2013.

RBID : PMC:3866197

Abstract

TiO₂ photocatalysis can be used to kill surface adherent bacteria on biomaterials, and is particularly interesting for use with percutaneous implants and devices. Its efficiency and safety, however, depend on the activation energy required. This in vitro study investigates synergetic effects against the clinically relevant strains S. epidermidis and S. mutans when combining photocatalytic surfaces with H₂O₂. After 20 min exposure to 0.1 wt% H₂O₂ and UV light on TiO₂ surfaces, viabilities of S. epidermidis and S. mutans were reduced by 99.7% and 98.9%, respectively. Without H₂O₂ the corresponding viability reduction was 86% for S. epidermidis and 65% for S. mutans. This study indicates that low concentrations of H₂O₂ can enhance the efficiency of photocatalytic TiO₂ surfaces, which could potentially improve current techniques used for decontamination and debridement of TiO₂ coated biomedical implants and devices.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3866197

DOI: 10.4161/biom.26727
PubMed: 24135830
PubMed Central: 3866197

Affiliations:

Suède

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<front><div type="abstract" xml:lang="en"><p>TiO<sub>2</sub>
 photocatalysis can be used to kill surface adherent bacteria on biomaterials, and is particularly interesting for use with percutaneous implants and devices. Its efficiency and safety, however, depend on the activation energy required. This in vitro study investigates synergetic effects against the clinically relevant strains <italic>S. epidermidis</italic>
 and <italic>S. mutans</italic>
 when combining photocatalytic surfaces with H<sub>2</sub>
O<sub>2</sub>
. After 20 min exposure to 0.1 wt% H<sub>2</sub>
O<sub>2</sub>
 and UV light on TiO<sub>2</sub>
 surfaces, viabilities of <italic>S. epidermidis</italic>
 and <italic>S. mutans</italic>
 were reduced by 99.7% and 98.9%, respectively. Without H<sub>2</sub>
O<sub>2</sub>
 the corresponding viability reduction was 86% for <italic>S. epidermidis</italic>
 and 65% for <italic>S. mutans</italic>
. This study indicates that low concentrations of H<sub>2</sub>
O<sub>2</sub>
 can enhance the efficiency of photocatalytic TiO<sub>2</sub>
 surfaces, which could potentially improve current techniques used for decontamination and debridement of TiO<sub>2</sub>
 coated biomedical implants and devices.</p>
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Synergetic inactivation of Staphylococcus epidermidis and Streptococcus mutansin a TiO2/H2O2/UV system

Synergetic inactivation of Staphylococcus epidermidis and Streptococcus mutansin a TiO2/H2O2/UV system

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