Methods The specimens of the five wires were tested and compared for their elastic modulus, elastic limit, tensile strength, reverting angle, torsional strength and f atigue strength.

• 方法对上述5种临床常用正畸钢丝的弹性模量、性极限、弹角、拉强度、转强度、劳强度等机械性能进行测试和比较。