氧化锌纳米涂层改善镍钛合金的抗菌和摩擦性能。
Zinc-oxide nanocoating for improvement of the antibacterial and frictional behavior of nickel-titanium alloy.
机构信息
Department of Orthodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
Department of Orthodontics, Faculty of Dentistry, Zanjan University of Medical Sciences, Zanjan, Iran.
出版信息
Nanomedicine (Lond). 2016 Oct;11(19):2511-27. doi: 10.2217/nnm-2016-0171. Epub 2016 Sep 13.
AIM
To fabricate a friction-reducing and antibacterial coating with zinc oxide (ZnO) nanoparticles on nickel-titanium (NiTi) wire.
MATERIALS & METHODS: NiTi orthodontic wires were coated with ZnO nanoparticles using the chemical deposition method. Characteristics of the coating as well as the physical, mechanical and antibacterial properties of the wires were investigated.
RESULTS
A stable and well-adhered ZnO coating on the NiTi wires was obtained. The hardness and elastic modulus of the ZnO nanocoating were 2.3 ± 0.2 and 61.0 ± 3.6 GPa, respectively. The coated wires presented up to 21% reduction in the frictional forces and antibacterial activity against Streptococcus mutans. ZnO nanocoating significantly improved the surface quality of NiTi wires. The modulus of elasticity, unloading forces and austenite finish temperature were not significantly different after coating.
CONCLUSION
This unique coating could be implemented into practice for safer and faster treatment to the benefit of both patient and clinician.
目的
在镍钛（NiTi）丝上制备具有氧化锌（ZnO）纳米颗粒的减摩抗菌涂层。
材料与方法
采用化学沉积法在 NiTi 正畸丝上涂覆 ZnO 纳米颗粒。研究了涂层的特性以及丝的物理、机械和抗菌性能。
结果
在 NiTi 丝上获得了稳定且附着力良好的 ZnO 涂层。ZnO 纳米涂层的硬度和弹性模量分别为 2.3±0.2 和 61.0±3.6 GPa。涂层后的线材摩擦力降低了 21%，对变形链球菌具有抗菌活性。ZnO 纳米涂层显著改善了 NiTi 线材的表面质量。涂层后，弹性模量、卸载力和奥氏体完成温度没有明显差异。
结论
这种独特的涂层可以应用于实际，为患者和临床医生带来更安全、更快的治疗效果。
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