Hammad Shaza M, El-Wassefy Noha A, Shamaa Marwa Sameh, Fathy Ahmed
Mansoura University,Faculty of Dentistry, Department of Orthodontics (Mansoura, Egypt).
Mansoura University, Faculty of Dentistry, Department of Dental Biomaterials (Mansoura, Egypt).
Dental Press J Orthod. 2020 Jul-Aug;25(4):51-58. doi: 10.1590/2177-6709.25.4.051-058.oar.
To investigate the effect of ZnO nanocoating on mechanical properties of NiTi orthodontic wires and antibacterial activity.
0.016 x 0.022-in NiTi orthodontic wires were coated with ZnO nanoparticles using an electrochemical deposition method with three electrodes system in 0.1M Zn(NO3)2. Mechanical properties and frictional resistance of the coated wires were investigated using an universal testing machine. Antibacterial effect of ZnO coating was also investigated.
A stable adhered ZnO nanocoating on NiTi wires was obtained. The coated wires have a significant antibacterial activity against S. aureus, S. pyogens and E. coli, and a reduction of frictional forces by 34%.
ZnO nanocoating may improve the antibacterial effects of NiTi wires and reduce the frictional resistance. Coating may be implanted in orthodontic practice for faster and safer treatment.
研究氧化锌纳米涂层对镍钛正畸丝力学性能及抗菌活性的影响。
采用三电极体系的电化学沉积法，在0.1M硝酸锌溶液中，为0.016×0.022英寸的镍钛正畸丝涂上氧化锌纳米颗粒。使用万能试验机研究涂层丝的力学性能和摩擦阻力。同时也研究了氧化锌涂层的抗菌效果。
在镍钛丝上获得了稳定附着的氧化锌纳米涂层。涂层丝对金黄色葡萄球菌、化脓性链球菌和大肠杆菌具有显著的抗菌活性，摩擦力降低了34%。
氧化锌纳米涂层可提高镍钛丝的抗菌效果并降低摩擦阻力。该涂层可应用于正畸治疗，以实现更快、更安全的治疗效果。
