TiO_(2-x)N_y薄膜托槽的表面摩擦性能

Friction properties of orthodontic brackets coated with TiO_(2-x) N_y

背景:课题组前期开发的Ti O2-x Ny薄膜托槽具有优异的抗菌性能和生物安全性能。目的:考察Ti O2-x Ny薄膜托槽的表面摩擦性能。方法:采用射频磁控溅射制备Ti O2-x Ny薄膜托槽(0.022″),用X射线衍射、扫描电镜等方法表征托槽表面的理化性能。分别检测金属MBT直丝弓托槽、Ti O2-x Ny薄膜托槽与镍钛圆丝0.012、0.014、0.016间的最大静摩擦系数及动摩擦系数。结果与结论:Ti O2-x Ny薄膜托槽表面为锐钛矿结构特征峰,表面光洁均匀,致密且结晶度好。干燥状态下,Ti O2-x Ny薄膜托槽的最大静摩擦系数和动摩擦系数均小于金属MBT直丝弓托槽;湿润状态下,Ti O2-x Ny薄膜托槽的最大静摩擦系数和动摩擦系数均小于金属MBT直丝弓托槽,但差异无显著性意义。表明纳米Ti O2-x Ny薄膜减少了托槽和弓丝间的摩擦力,为降低牙齿移动过程中摩擦力提供了新的方向。

BACKGROUND：In previous experiments, TiO2-xNy OBJECTIVE：To study the friction properties of orthodontic brackets coated with TiO-coated bracket has been confirmed to have excelent antibacterial properties and biological safety performance. 2-xNy METHODS： TiO film. 2-xNy film was prepared by radiofrequency magnetron sputtering on MBT bracket （0.022″）. The TiO 2-x N y RESULTS AND CONCLUSION： TiO-coated brackets were analyzed by X-ray diffraction and scanning electron microscopy observations. The coefficient of static friction and coefficient of kinetic friction between the wires （0.012″, 0.014″, 0.016″） and orthodontic brackets were calculated. 2-xNy film on the bracket was of anatase structure, which was compact and had good crystalinity. Under dry condition, the coefficient of static friction and kinetic friction of the brackets coated with TiO2-xNy were less than those of ordinary brackets; under wet condition, the coefficients of static friction and kinetic friction of the brackets coated with TiO2-xNy were less than those of ordinary brackets, but the difference was not statisticaly significant. Nano-TiO2-xNy film can reduce the friction between bracket and archwire, which wil offer a novel opportunity to significantly reduce the friction during tooth movement.