Antibacterial, Hydrophilic Effect and Mechanical Properties of Orthodontic Resin Coated with UV-Responsive Photocatalyst
Photocatalysts have multiple applications in air purifiers, paints, and self-cleaning coatings for medical devices such as catheters, as well as in the elimination of xenobiotics. In this study, a coating of a UV-responsive photocatalyst, titanium dioxide (TiO2), was applied to an orthodontic resin....
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doaj-bc2219b55fec47f9a4b80ed018f75f182020-11-24T23:16:16ZengMDPI AGMaterials1996-19442018-05-0111688910.3390/ma11060889ma11060889Antibacterial, Hydrophilic Effect and Mechanical Properties of Orthodontic Resin Coated with UV-Responsive PhotocatalystAkira Kuroiwa0Yoshiaki Nomura1Tsuyoshi Ochiai2Tomomi Sudo3Rie Nomoto4Tohru Hayakawa5Hiroyuki Kanzaki6Yoshiki Nakamura7Nobuhiro Hanada8Department of Orthodontics, Tsurumi University School of Dental Medicine, Yokohama 230-8501, JapanDepartment of Translational Research, Tsurumi University School of Dental Medicine, Yokohama 230-8501, JapanPhotocatalyst Group, Research and Development Department, Local Independent Administrative Agency Kanagawa Institute of industrial Science and TEChnology (KISTEC), 407 East Wing, Innovation Center Building, KSP, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, JapanDepartment of Orthodontics, Tsurumi University School of Dental Medicine, Yokohama 230-8501, JapanDepartment of Dental Engineering, Tsurumi University School of Dental Medicine, Yokohama 230-8501, JapanDepartment of Dental Engineering, Tsurumi University School of Dental Medicine, Yokohama 230-8501, JapanDepartment of Orthodontics, Tsurumi University School of Dental Medicine, Yokohama 230-8501, JapanDepartment of Orthodontics, Tsurumi University School of Dental Medicine, Yokohama 230-8501, JapanDepartment of Translational Research, Tsurumi University School of Dental Medicine, Yokohama 230-8501, JapanPhotocatalysts have multiple applications in air purifiers, paints, and self-cleaning coatings for medical devices such as catheters, as well as in the elimination of xenobiotics. In this study, a coating of a UV-responsive photocatalyst, titanium dioxide (TiO2), was applied to an orthodontic resin. The antibacterial activity on oral bacteria as well as hydrophilic properties and mechanical properties of the TiO2-coated resin were investigated. ultraviolet A (UVA) (352 nm) light was used as the light source. Antibacterial activity was examined with or without irradiation. Measurements of early colonizers and cariogenic bacterial count, i.e., colony forming units (CFU), were performed after irradiation for different time durations. Hydrophilic properties were evaluated by water contact angle measurements. While, for the assessment of mechanical properties, flexural strength was measured by the three-point bending test. In the coat(+)light(+) samples the CFU were markedly decreased compared to the control samples. Water contact angle of the coat(+)light(+) samples was decreased after irradiation. The flexural strength of the specimen irradiated for long time showed a higher value than the required standard value, indicating that the effect of irradiation was weak. We suggest that coating with the ultraviolet responsive photocatalyst TiO2 is useful for the development of orthodontic resin with antimicrobial properties.http://www.mdpi.com/1996-1944/11/6/889orthodontic resinphotocatalyst TiO2antibacterialcariogenicearly colonizerhydrophilic propertiesirradiation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Akira Kuroiwa Yoshiaki Nomura Tsuyoshi Ochiai Tomomi Sudo Rie Nomoto Tohru Hayakawa Hiroyuki Kanzaki Yoshiki Nakamura Nobuhiro Hanada |
spellingShingle |
Akira Kuroiwa Yoshiaki Nomura Tsuyoshi Ochiai Tomomi Sudo Rie Nomoto Tohru Hayakawa Hiroyuki Kanzaki Yoshiki Nakamura Nobuhiro Hanada Antibacterial, Hydrophilic Effect and Mechanical Properties of Orthodontic Resin Coated with UV-Responsive Photocatalyst Materials orthodontic resin photocatalyst TiO2 antibacterial cariogenic early colonizer hydrophilic properties irradiation |
author_facet |
Akira Kuroiwa Yoshiaki Nomura Tsuyoshi Ochiai Tomomi Sudo Rie Nomoto Tohru Hayakawa Hiroyuki Kanzaki Yoshiki Nakamura Nobuhiro Hanada |
author_sort |
Akira Kuroiwa |
title |
Antibacterial, Hydrophilic Effect and Mechanical Properties of Orthodontic Resin Coated with UV-Responsive Photocatalyst |
title_short |
Antibacterial, Hydrophilic Effect and Mechanical Properties of Orthodontic Resin Coated with UV-Responsive Photocatalyst |
title_full |
Antibacterial, Hydrophilic Effect and Mechanical Properties of Orthodontic Resin Coated with UV-Responsive Photocatalyst |
title_fullStr |
Antibacterial, Hydrophilic Effect and Mechanical Properties of Orthodontic Resin Coated with UV-Responsive Photocatalyst |
title_full_unstemmed |
Antibacterial, Hydrophilic Effect and Mechanical Properties of Orthodontic Resin Coated with UV-Responsive Photocatalyst |
title_sort |
antibacterial, hydrophilic effect and mechanical properties of orthodontic resin coated with uv-responsive photocatalyst |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2018-05-01 |
description |
Photocatalysts have multiple applications in air purifiers, paints, and self-cleaning coatings for medical devices such as catheters, as well as in the elimination of xenobiotics. In this study, a coating of a UV-responsive photocatalyst, titanium dioxide (TiO2), was applied to an orthodontic resin. The antibacterial activity on oral bacteria as well as hydrophilic properties and mechanical properties of the TiO2-coated resin were investigated. ultraviolet A (UVA) (352 nm) light was used as the light source. Antibacterial activity was examined with or without irradiation. Measurements of early colonizers and cariogenic bacterial count, i.e., colony forming units (CFU), were performed after irradiation for different time durations. Hydrophilic properties were evaluated by water contact angle measurements. While, for the assessment of mechanical properties, flexural strength was measured by the three-point bending test. In the coat(+)light(+) samples the CFU were markedly decreased compared to the control samples. Water contact angle of the coat(+)light(+) samples was decreased after irradiation. The flexural strength of the specimen irradiated for long time showed a higher value than the required standard value, indicating that the effect of irradiation was weak. We suggest that coating with the ultraviolet responsive photocatalyst TiO2 is useful for the development of orthodontic resin with antimicrobial properties. |
topic |
orthodontic resin photocatalyst TiO2 antibacterial cariogenic early colonizer hydrophilic properties irradiation |
url |
http://www.mdpi.com/1996-1944/11/6/889 |
work_keys_str_mv |
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