Nitrogen doped titanium dioxide as an aesthetic antimicrobial filler in dental polymers
To develop an aesthetic resin composite using a nitrogen-doped titanium dioxide (NTiO2) filler that possesses antimicrobial properties against cariogenic bacteria. N-TiO2 powder was manufactured by calcining commercial TiO2 with urea. Free radical release from the N-TiO2 powder under visible light i...
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Published in | Dental materials Vol. 38; no. 1; pp. 147 - 157 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
England
Elsevier Inc
01.01.2022
Elsevier BV |
Subjects | |
Online Access | Get full text |
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Summary: | To develop an aesthetic resin composite using a nitrogen-doped titanium dioxide (NTiO2) filler that possesses antimicrobial properties against cariogenic bacteria.
N-TiO2 powder was manufactured by calcining commercial TiO2 with urea. Free radical release from the N-TiO2 powder under visible light irradiation was analysed using UV-Vis spectrophotometry. The N-TiO2 powder was incorporated into a dental resin and the photocatalytic activity assessed using a dye under both visible light and dark conditions. Using XTT assay to measure the cellular metabolic activity, the antibacterial properties of the N-TiO2 /resin composite discs were tested using Streptococcus mutans.
Doping nitrogen of TiO2 resulted in a band gap shift towards the visible light spectrum, which enabled the powder to release reactive oxygen species when exposed to visible light. When incorporated into a dental resin, the N-TiO2/resin composite still demonstrated sustained release of reactive oxygen species, maintaining its photocatalytic activity and showing an antibacterial effect towards Streptococcus mutans under visible light conditions.
N-TiO2 filled resin composite shows great promise as a potential aesthetic resin based adhesive for orthodontic bonding.
•N doping of TiO2 produces a photocatalytic powder under visible light.•Photocatalytic properties of N-TiO2 were maintained following incorporation into a dental resin.•N-TiO2 filled resin is aesthetic.•N-TiO2 filled resin is antibacterial on S. mutans under visible light. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0109-5641 1879-0097 |
DOI: | 10.1016/j.dental.2021.10.019 |