Lock-loose托槽与传统托槽摩擦力特性的比较研究

发布时间：2018-02-24 07:43

本文关键词： Lock-loose托槽摩擦力人工唾液正畸　出处：《华西口腔医学杂志》2014年06期 　论文类型：期刊论文

【摘要】：目的在干燥和人工唾液环境中测量Lock-loose托槽结扎中间翼和结扎全翼时与弓丝之间滑动摩擦力和静摩擦力的大小,并与传统四翼托槽和自锁托槽进行对比。方法应用原子力显微镜观察不锈钢弓丝与不同托槽摩擦前后的表观形貌。选用Lock-loose托槽、传统四翼托槽和自锁托槽,分别与0.406 4 mm、0.457 2 mm不锈钢圆丝和0.457 2 mm×0.634 9 mm、0.482 6 mm×0.634 9 mm不锈钢方丝组合,其中Lock-loose托槽使用结扎中间翼和结扎全翼两种结扎方式。使用电子万能力学实验机测量干燥和人工唾液两种环境下弓丝在托槽内滑动的动、静摩擦力。结果不同尺寸弓丝与不同托槽摩擦前后的表面粗糙度无明显差异(P0.05);Lock-loose托槽结扎中间翼与4种弓丝组合的动、静摩擦力均接近于0,与传统四翼托槽有明显差异(P0.05);与0.457 2 mm×0.634 9 mm不锈钢方丝组合时,Lock-loose托槽结扎全翼可以获得最大动、静摩擦力,与传统四翼托槽和自锁托槽的差异有统计学意义(P0.05);人工唾液环境中的摩擦力小于干燥环境中的摩擦力(P0.05)。结论 Lock-loose托槽可以通过不同的结扎方式调节并获得临床所需的摩擦力,有效解决了低摩擦力与强支抗控制的矛盾问题。
[Abstract]:Objective to measure the sliding friction force and static friction force between Lock-loose bracket ligation and total wing ligation in dry and artificial saliva environment. Methods the morphology of stainless steel arch wire before and after friction with different brackets was observed by atomic force microscope. Lock-loose bracket, traditional four-wing bracket and self-locking bracket were selected. Combined with stainless steel round wire of 0.406 4 mm and stainless steel square wire of 0.457 2 mm 脳 0.634 9 mm with 0.482 6 mm 脳 0.634 9 mm square wire, respectively. The Lock-loose bracket was ligated by ligating the middle wing and the whole wing. The movement of the bow wire sliding in the bracket was measured by using the electronic universal mechanical experiment machine in both dry and artificial saliva environments. Results there was no significant difference in surface roughness between different sizes of bow wires and different brackets before and after friction. When combined with 0.457 2 mm 脳 0.634 mm stainless steel square wire, the maximum dynamic and static friction force can be obtained by ligating the full wing of the lock-loose bracket, the static friction force is close to 0, and there is a significant difference between the static friction force and the traditional four-wing bracket, and when combined with 0.457 2 mm 脳 0.634 9 mm stainless steel square wire, the static friction force can be obtained. The difference between the four wing brackets and the self-locking brackets is statistically significant, and the friction force in artificial saliva is smaller than that in dry environment. Conclusion Lock-loose brackets can be adjusted by different ligation methods and the friction force needed in clinic can be obtained. The contradiction between low friction force and strong support control is effectively solved.
【作者单位】：吉林大学口腔医院正畸科;
【基金】：吉林省卫生厅科研基金资助项目(2010Z096)
【分类号】：R783.5

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