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目的:研制纳米二氧化硅涂层正畸不锈钢弓丝,并对弓丝涂层结构表面性能以及基本物理性能进行初步研究。方法:采用非平衡磁控溅射法,在不锈钢正畸弓丝表面沉积生成纳米二氧化硅膜,使用扫描电镜和能谱分析观察分析改性弓丝表面及截面的形貌特性,并比较两种弓丝的摩擦性能。结果:研制生产出纳米二氧化硅涂层弓丝,弓丝表面沉积二氧化硅薄膜厚度约50 nm。二氧化硅尺寸均一,分布均匀,表面光洁度高,涂层弓丝摩擦性能明显优于不锈钢弓丝。结论:弓丝表面纳米二氧化硅镀膜对弓丝尺寸几乎无影响,具有良好表面性状及光化学活性,且降低了托槽—弓丝间的摩擦力,可以满足口腔正畸临床需要。
OBJECTIVE: To develop an orthodontic stainless steel arch wire with nano-silica coating and to study the surface properties and basic physical properties of the wire wire coating. Methods: The non-equilibrium magnetron sputtering method was used to deposit nanosilica film on the surface of stainless steel orthodontic arch wire. Morphology characteristics of modified archwire surface and cross section were observed and analyzed by SEM and EDS. Filament silk friction properties. Results: The nanosilica coating was developed and produced. The thickness of silicon dioxide deposited on the surface of arch wire was about 50 nm. Silica has uniform size, uniform distribution and high surface finish. The friction properties of the coated archwire are obviously better than that of the stainless steel archwire. Conclusion: The nanosilica coating on the surface of the archwire has little effect on the size of the archwire, has good surface properties and photochemical activity, and reduces the friction between the bracket and the archwire to meet the clinical needs of orthodontics.