M-LF托槽、传动直丝弓托槽、MBT托槽的摩擦力比较

发布时间：2018-05-19 05:24

本文选题：摩擦力 + M-LF托槽　；参考：《新疆医科大学》2017年硕士论文

【摘要】：目的:测试3种不锈钢托槽与不同尺寸弓丝、不同结扎方式组合所产生的摩擦力大小,探讨对摩擦力影响最显著的因素。方法:本实验在干燥环境中使用WDW200.5电子式万能试验机进行测试,采用正交设计,测试3种直丝弓托槽(MBT托槽、M-LF托槽、传动直丝弓托槽)、3种尺寸弓丝(0.017×0.025英寸不锈钢方丝、0.018×0.025英寸不锈钢方丝、0.019×0.025英寸不锈钢方丝)与3种结扎方式(弹力结扎圈、0.20mm不锈钢结扎丝、0.25mm不锈钢结扎丝)组合的摩擦力,进行极差分析和方差分析。再对弓丝及托槽进行电镜扫描。结果:影响摩擦力的因素由大到小为:结扎方式、弓丝尺寸、托槽种类;M-LF托槽搭配0.017×0.025英寸不锈钢弓丝使用0.20mm不锈钢丝结扎所产生摩擦力最小。结论:弓丝尺寸与结扎方式影响摩擦阻力。M-LF托槽的“减法”设计明显降低了托槽与弓丝间的摩擦力,有助于快速排齐牙齿。使用较细结扎丝,有助于使用滑动机制关闭后牙间隙。
[Abstract]:Objective: to test the friction force produced by the combination of three stainless steel brackets with different sizes of bow wires and different ligation methods, and to explore the most significant factors affecting the friction force. Methods: in this experiment, WDW200.5 universal testing machine was used in the dry environment, and three kinds of straight wire bow brackets were tested by orthogonal design. Transmission straight wire bracket with three dimensions: arch wire 0.017 脳 0.025 inch stainless steel square wire 0.018 脳 0.025 inch stainless steel square wire 0.019 脳 0.025 inch stainless steel square wire, combined with three kinds of ligation modes (elastic ligation ring, 0.20mm stainless steel ligation wire, 0.25mm stainless steel ligature wire), Range analysis and variance analysis were performed. The arch wire and bracket were scanned by electron microscope. Results: the factors influencing the friction force were: ligation mode, arch wire size, bracket type, M-LF bracket and 0.017 脳 0.025 inch stainless steel arch wire ligated with 0.20mm stainless steel wire. Conclusion: the design of "subtraction" of the friction resistance. M-LF bracket can obviously reduce the friction force between the bracket and the arch wire, and is helpful to the rapid alignment of teeth. The use of thin ligation helps to close the posterior space with a sliding mechanism.
【学位授予单位】：新疆医科大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：R783.5

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