Klump J P, Duncanson M G, Nanda R S, Currier G F
Department of Dental Materials, University of Oklahoma College of Dentistry, Oklahoma City.
Am J Orthod Dentofacial Orthop. 1994 Dec;106(6):588-96. doi: 10.1016/S0889-5406(94)70083-4.
This investigation determined the ratio of the energy available for orthodontic tooth movement to the stiffness and flexibility of a given wire. Twenty-five specimens each of five brands of orthodontic wire were tested in tension in the as-received condition. Force versus elongation diagrams were obtained and then converted into stress-strain data. Mean values were determined for the yield strength and yield strain for each brand of wire. The modulus of elasticity (E), modulus of resilience (R), and elastic compliance (C) were then calculated. Two ratios were established by using the three mechanical properties: (1) the modulus of resilience/modulus of elasticity (R/E) ratio and (2) the modulus of resilience/elastic compliance (R/C) ratio. The results confirmed that the use of these two ratios in combination permitted one to differentiate among the various types of orthodontic wires, with respect to stored energy and its relationship to the stiffness or flexibility of the wire.
本研究确定了可用于正畸牙齿移动的能量与给定钢丝的刚度和柔韧性之间的比率。对五个品牌正畸钢丝的25个样本在收到时的状态下进行拉伸测试。获得力与伸长率图表，然后将其转换为应力-应变数据。确定每个品牌钢丝的屈服强度和屈服应变的平均值。然后计算弹性模量（E）、回弹模量（R）和弹性柔量（C）。通过使用这三种力学性能建立了两个比率：（1）回弹模量/弹性模量（R/E）比率和（2）回弹模量/弹性柔量（R/C）比率。结果证实，结合使用这两个比率可以区分不同类型的正畸钢丝在储存能量及其与钢丝刚度或柔韧性的关系方面的差异。
