Synergetic inactivation of <i>Staphylococcus epidermidis</i> and <i>Streptococcus mutans</i>in a TiO₂/H₂O₂/UV system

Antibacterial Surface Coating for Bone Scaffolds Based on the Dark Catalytic Effect of Titanium Dioxide

“…These observations are likely to result from the lower total number of viable bacteria on the sample surface following the initial bacterial attachment period and early observation timepoints ( Figure 6), which was further confirmed by the significantly reduced number of CFUs observed for the H2O2-treated coated samples at both 4 h and 12 h timepoints ( Figure 5B). Further, similar effects have been observed against S. epidermidis and S. mutans for H2O2-oxidised and H2O aged titanium, 55 and against five strains related to implant-related infections for TiO2…”

“…25 All these groups related the antibacterial effect to the presence of O2 - The antibacterial activity of the coated surfaces was still observed 24 h after the treatment with H2O2 ( Figures 5 and 6), and therefore, the stability of the oxidative layer in air was found to be higher than that previously reported for UV-irradiated TiO2 surface either with or without exposure to H2O2. 25,55 When in contact with bacterial suspension, the stabilised radicals may be consumed and partly decompose vital bacterial compounds analogous to the degradation of MB (Figure 4). This is supported by the higher number of dead bacteria observed on the modified TiO2 surfaces 4 h after seeding ( Figure 6).…”

Bacterial adhesion mechanisms on dental implant surfaces and the influencing factors

“…Viabilities of S. epidermidis and S. mutans were reduced by 99.7% and 98.9% respectively after exposure to 0.1 wt% H 2 O 2 and UV light on TiO 2 surfaces for 20 min, while he corresponding viability reduction was 86% for S. epidermidis and 65% for S. mutans without H 2 O 2 . This study indicated H 2 O 2 can improve the efficiency of photocatalytic TiO 2 surfaces [197].…”

Oxidative power of aqueous non-irradiated TiO 2 -H 2 O 2 suspensions: Methylene blue degradation and the role of reactive oxygen species

“…207 Further, the formation of a biofilm is characteristic of the infection of dental and orthopaedic implants, and S. epidermidis has been extensively used to study this behaviour in vitro. 114,115,203,208 It readily forms biofilms on various substrates in a monoculture and is less virulent compared to S. aureus. 58 In addition, S. epidermidis grows under aerobic and anaerobic conditions with high tolerance against exogenous oxidative stress.…”