无论哪一列需要排序，都可以通过对根bean中的arrayList进行重新排序来实现。
It does this by reordering the arrayList in the root bean for whatever column needs to be sorted.
然而，上述材料均不能满足一些特殊情况下对根管修复治疗的需要。
However, none of these are ideal for the special conditions and requirements of root repair.
方法：对135例需要恒磨牙根管再治疗患者的159颗恒磨牙(232个根管)用显微超声技术进行再治疗，按牙位及治疗原因分类，比较成功率。
Methods: the total of 232 root canal in 159 teeth of 135 patients who need root canal retreatment of the permanent molar were treated by using dental operative microscope and ultrasonic technique.
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