1. A Multifunctional Dental Resin Composite with Sr-N-Doped TiO 2 and n-HA Fillers for Antibacterial and Mineralization Effects.
- Author
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Zhao, Yuanhang, Zhang, Hong, Hong, Lihua, Zou, Xinying, Song, Jiazhuo, Han, Rong, Chen, Jiawen, Yu, Yiyan, Liu, Xin, Zhao, Hong, and Zhang, Zhimin
- Subjects
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DENTAL resins , *DENTAL materials , *TITANIUM dioxide , *MINERALIZATION , *REACTIVE oxygen species , *STREPTOCOCCUS mutans , *DENTAL glass ionomer cements - Abstract
Dental caries, particularly secondary caries, which is the main contributor to dental repair failure, has been the subject of extensive research due to its biofilm-mediated, sugar-driven, multifactorial, and dynamic characteristics. The clinical utility of restorations is improved by cleaning bacteria nearby and remineralizing marginal crevices. In this study, a novel multifunctional dental resin composite (DRC) composed of Sr-N-co-doped titanium dioxide (Sr-N-TiO2) nanoparticles and nano-hydroxyapatite (n-HA) reinforcing fillers with improved antibacterial and mineralization properties is proposed. The experimental results showed that the anatase-phase Sr-N-TiO2 nanoparticles were synthesized successfully. After this, the curing depth (CD) of the DRC was measured from 4.36 ± 0.18 mm to 5.10 ± 0.19 mm, which met the clinical treatment needs. The maximum antibacterial rate against Streptococcus mutans (S. mutans) was 98.96%, showing significant inhibition effects (p < 0.0001), which was experimentally verified to be derived from reactive oxygen species (ROS). Meanwhile, the resin exhibited excellent self-remineralization behavior in an SBF solution, and the molar ratio of Ca/P was close to that of HA. Moreover, the relative growth rate (RGR) of mouse fibroblast L929 indicated a high biocompatibility, with the cytotoxicity level being 0 or I. Therefore, our research provides a suitable approach for improving the antibacterial and mineralization properties of DRCs. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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