Kojima Yukio, Fukui Hisao, Miyajima Kuniaki
Department of Mechanical Engineering, Nagoya Institute of Technology, Nagoya, Japan.
Am J Orthod Dentofacial Orthop. 2006 Sep;130(3):275.e1-10. doi: 10.1016/j.ajodo.2006.02.030.
The purposes of this article were to clarify the combined effect of friction and an archwire's flexural rigidity on canine movement in sliding mechanics, and to explain how to select a suitable archwire and force level for efficient bodily movement.
A numerical simulation was carried out by using a 3-dimensional finite element method.
As the frictional force decreased, both the net force acting on and the moving speed of the canine increased. The elastic deformation of the archwire increased, and the moving pattern of the canine changed from bodily movement to tipping, although there was no clearance between the archwire and the bracket slot. When a light wire was used, wire deformation increased, and the canine experienced greater tipping. These effects of friction and wire properties on canine movement (tipping and rotational angles) are combined by using a single parameter, EI/P, where EI is the flexural rigidity of the archwire, and P is the net force acting on the canine. A suitable combination of EI and P will cause canine bodily movement. The EI is determined from the archwire's size and material.
We propose a method for estimating a suitable combination in this article.
本文旨在阐明滑动力学中摩擦力与弓丝弯曲刚度对尖牙移动的综合影响，并解释如何选择合适的弓丝和力值以实现有效的整体移动。
采用三维有限元法进行数值模拟。
随着摩擦力减小，作用于尖牙的净力和尖牙移动速度均增加。尽管弓丝与托槽槽沟之间无间隙，但弓丝的弹性变形增加，尖牙的移动模式从整体移动变为倾斜移动。使用细丝时，丝的变形增加，尖牙倾斜更明显。摩擦力和丝的特性对尖牙移动（倾斜和旋转角度）的这些影响通过使用单个参数EI/P来综合，其中EI是弓丝的弯曲刚度，P是作用于尖牙的净力。EI和P的合适组合将导致尖牙整体移动。EI由弓丝的尺寸和材料确定。
本文提出了一种估计合适组合的方法。
