Methods The three-dimensional finite element model of rocking-chair archwire was set up,and nonlinear method was used to analysis the force system of molars and incisors in different condition.

• 方法采用有限元分析软件建立摇椅弓的三维有限元模型,用非线性分析法分析其在不同情况下施予切牙和磨牙的力系统。