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Antibacterial ability and biocompatibility of fluorinated titanium by plasma-based surface modification

Rare Metals 2022年第2期41卷 689-699页

作者： Mian Chen Xiao-Qiao Wang Er-Lin Zhang Yi-Zao Wan Jian Hu Jiangxi Key Laboratory of Nanobiomaterials Institute of Advanced MaterialsEast China Jiaotong UniversityNanchang 330013China Key Laboratory for Anisotropy and Texture of Materials(ATM) School of Material Science and EngineeringNortheastern UniversityShenyang 110819China

Biomaterial surfaces with satisfied antibacterial activity and appropriate cytocompatibility are a pressing clinical need for orthopedic and dental implants.Fluorinecontaining biomaterials have been demonstrated to obtain antibacterial activity and osteogenic property,while the effect of fluorine chemical compositions on antibacterial property and cytocompatibility is rarely studied.To this end,the coatings with different fluorine chemical compositions on titanium surface were prepared by plasma treatment to verify the antibacterial ability and cytocompatibility of fluorinated surfaces.Their antibacterial ability was evaluated by using Staphylococcus aureus,and the cell compatibility was investigated with MC3T3-E1 cells in vitro.The results show that both fluorocarbon coating and metal fluorides coating exhibited a hydrophilic and nano-scaled roughness.Rather than the fluorocarbon coating,the coating composed of metal fluorides presented satisfied bactericide effect and excellent cytocompatibility.The antibacterial mechanism is associated with the metal fluorides and released fluoride ion.This work would provide novel sight in optimizing the surface modification method of fluorinated biomaterials for biomedical applications.

关键词： Titanium plasma-based technology Fluorine Antibacterial property Cytocompatibility

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