Preparation and Characterization of CaO/ZnO Core-shell Structured Nanoparticles
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doi: 10.1007/s40242-020-9029-1
Preparation and Characterization of CaO/ZnO Core-shell Structured Nanoparticles WANG Lili1, LIU Yanan1, PENG Xiaoxing2, SUN Yuanqing3, LIU Xiaohua4, LIU Huimin1, LIN Quan3, SUN Hongchen1, YANG Bai3 and LI Xiangwei1* 1. School of Stomatology, Jilin University, Changchun 130021, P. R. China; 2. Hospital Attached to Changchun University of Chinese Medicine, Changchun 130041, P. R. China; 3. State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, P. R. China; 4. Department of Biomedical Sciences, Texas A&M University, College of Dentistry, Dallas, TX 75246, USA Abstract Residual bacteria and microleakage in a complicated root canal can often result in reinfection of the periapical tissues. To promote the antibacterial and sealing effects of a root canal filling, core-shell structured CaO/ZnO nanospheres were synthesized using a precipitation method based on a traditional root canal sealer, zinc oxide-eugenol(ZOE). The obtained CaO/ZnO particles had a size of 80―90 nm and a core-shell structure. The film thickness, flow rate, pH, and calcium ion release of the core-shell structured CaO/ZnO nanospheres-eugenol paste were tested. The pH and calcium ion release results showed a slight increase in the prepared nanospheres, with a flow rate of 24.22 mm and a formed film thickness of 30 μm, which are basically consistent with ISO 6876:2001 sta ndards(regarding dental root canal sealing materials). Cytotoxicity tests showed that the cytocompatibility of the CaO/ZnO nanospheres-eugenol paste was much higher than that of the ZOE or iRoot SP groups(P
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