TiO2-xNx thin films on ceramic bracket surfaces: preparation and antibiotic performance

doi:10.3969/j.issn.2095-4344.2016.34.004

Abstract

Abstract:

BACKGROUND: Enamel demineralization has been plaguing doctors and patients in the fixed orthodontic treatment, so we attempt to seek an effective method of reducing its incidence.
OBJECTIVE: To prepare TiO₂-xNx thin films at different thicknesses on the ceramic bracket surface by sol-gel method followed by detection of antibiotic performance.
METHODS: TiO₂-xNx thin films at different thicknesses were prepared on the ceramic bracket surface by sol-gel method. The crystal structure, surface morphology and attachment force of these thin films were analyzed by X-ray diffraction, scanning electron microscope and multi-function material surface tester, respectively. The color changes of ceramic brackets before and after coating were evaluated through German VITA Easyshade Advance 4.0 photoelectric color comparator. Antibiotic performance of the ceramic bracket coated with TiO₂-xNx thin film for Candida albicans and Streptococcus mutans was evaluated by the flat colony counting method.
RESULTS AND CONCLUSION: The prepared TiO₂-xNx thin film was anatase type, which had uniform and compact structure, and its X-ray diffraction peaks were elevated with the increase of film thickness. The attachment force of the thickest film was 18.37 N, indicating the thin film has a good adhesion to the ceramic bracket and can withstand the friction in the oral cavity. The antibiotic performance of TiO₂-xNx thin film for Candida albicans and Streptococcus mutans was also enhanced as the thickness of the thin film tended to increase, while the color changes of the ceramic brackets coated with different thickness of TiO₂-xNx thin films were not significant. To conclude, the ceramic bracket coated with TiO₂-xNx film that does not affect the appearance has high antibacterial activity to common oral cariogenic bacteria and opportunistic pathogens, and the film can adhere well to the bracket.

中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程

CLC Number:

R318

Wang Jian-wei, Wang Yu, Che Yuan-qian, Zhu Bo-wu, Cao Bao-cheng. TiO₂-xNx thin films on ceramic bracket surfaces: preparation and antibiotic performance[J]. Chinese Journal of Tissue Engineering Research, 2016, 20(34): 5039-5044.

Figures/Tables 6

References

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TiO₂-xNx thin films on ceramic bracket surfaces: preparation and antibiotic performance

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