【摘要】 目的评估第二磨牙锁2种矫治方法的优、缺点。方法 38例患者,男22例,女16例随机分成2组,分别使用:一上下牙齿颌间交互牵引,二改良Nance弓,进行矫治。结果经过3～4个月的矫治,上颌第二磨牙正锁解除,上下颌交互牵引所需平均时间为3.75个月,改良Nance弓技术矫正锁平均时间为3.25个月(P<0.05)结论上下颌牙齿交互牵引和改良Nance弓均能解除第二磨牙锁,改良Nance弓技术能更有效快速地解除第二磨牙锁。更多还原

【Abstract】 Objective To evaluate the advantages and disadvantages of 2 kinds of methods in treating second molar scissors-bite.Methods 38 cases(22 males,16 females) were divided into 2 groups.One was treated with mutual elastics on the upper and lower teeth,while the other was treated with modified Nance arch.Results After 3 to 4 months′ treatment,the right locked occlusion was relieved.The average time treating with modified Nance arch was less than that treating with mutual elastics.Conclusions Both mutual elastics and modified Nance arth can cure the second molar scissors-bite,while the latter is more effective and can relieve the symptoms in a shorter time.更多还原