Lock-loose托槽、六翼托槽与传统托槽摩擦力特性的比较研究

发布时间：2018-05-26 16:32

本文选题：Lock-loose托槽 + 摩擦力　；参考：《吉林大学》2014年硕士论文

【摘要】：目的: 在干燥和人工唾液环境中测量Lock-loose托槽、六翼平底托槽结扎中间翼和结扎全翼时与弓丝之间动、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: 选用Lock-loose托槽、六翼平底托槽、传统四翼托槽和自锁托槽，分别与0.016"、0.018"不锈钢圆丝和0.018×0.025"、0.019×0.025"不锈钢方丝组合，其中Lock-loose托槽与六翼平底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，并利用原子力显微镜观察不锈钢方丝摩擦前后的表观形貌。结果: Lock-loose托槽与六翼平底托槽结扎中间翼与四种弓丝组合的摩擦力均接近于零，与传统四翼托槽有统计学差异（P0.05）；Lock-loose托槽全翼结扎时与四种弓丝组合的摩擦力均大于六翼平底托槽全翼结扎时与四种弓丝组合的摩擦力，且有统计学差异（P0.05）；与0.018×0.025"不锈钢方丝组合时，Lock-loose托槽结扎全翼获得最大摩擦力，与传统四翼托槽和自锁托槽有统计学差异（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： 1. Lock-loose托槽通过改变结扎方式实现了临床所需摩擦力大小的调节，，有效解决了低摩擦力与强支抗控制的矛盾。 2. Lock-loose托槽是在六翼平底托槽的平底槽沟的基础上形成突脊结构，并在摩擦力性能上成功的进行改良。 3.本实验中人工唾液组摩擦力小于干燥组摩擦力，且有显著性差异（P0.05），故人工唾液起到了润滑作用。
[Abstract]:Objective: In dry and artificial saliva environment, the dynamic and static friction between the middle wing and the full wing of the six-wing flat-bottom bracket was measured in the dry and artificial saliva environment, and compared with the traditional four-wing bracket and the self-locking bracket. Methods: Lock-loose brackets, six-wing flat-bottomed brackets, traditional four-wing brackets and self-locking brackets were combined with 0.016 "0. 018" stainless steel round wire and 0.018 脳 0.025 "0. 019 脳 0.025" stainless steel square wire respectively. Among them, Lock-loose bracket and six wing flat-bottom bracket were ligated with middle wing and whole wing respectively. The dynamic and static friction forces of the arch wire sliding in the bracket under dry and artificial saliva conditions were measured by using an electronic universal mechanical tester. The apparent morphology of stainless steel square wire before and after friction was observed by atomic force microscope. Results: The friction between the Lock-loose bracket and the six-wing flat-bottom bracket ligating the middle wing and the four bow wires is close to zero. There was significant difference between the four-wing bracket and the traditional four-wing bracket. The friction force between the four kinds of bow wire combination and the whole wing ligation of the P0.05 lock-loose bracket was higher than that of the four kinds of bow wire combination when the six-wing flat-bottom bracket was ligated with the whole wing, and the friction force of the four kinds of bow wire combination was higher than that of the six wing flat-bottom bracket. The maximum friction force of Lock-loose bracket ligated with 0.018 脳 0.025 "stainless steel square wire was significantly different from that of traditional four-wing bracket and self-locking bracket. The friction force in artificial saliva was smaller than that in dry environment. Conclusion: 1. By changing the ligation mode, the Lock-loose bracket can adjust the size of the friction force needed in clinic, and effectively solve the contradiction between the low friction force and the control of strong Anchorage. 2. The Lock-loose bracket is formed on the basis of the flat-bottom groove of the six-wing flat-bottomed bracket, and the friction performance is improved successfully. 3. In this experiment, the friction force of artificial saliva group is lower than that of dry group, and there is a significant difference (P0.05A), so artificial saliva plays a lubricating role.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：R783.5

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