不同酸蚀处理方法对氟斑牙托槽脱落率的影响

［摘 要］ 目的:观察不同酸蚀方法对氟斑牙粘结托槽的脱落率的影响，筛选一种降低氟斑牙托槽脱落率的临床可行的酸蚀方法。方法：选择14例中度氟斑牙患者的226颗牙齿为研究对象，按左右分为28个区，随机分为4组(每组7个区)：分别为酸蚀1 min组（n=56）、酸蚀2 min组（n=57）、酸蚀3 min组（n=57）和酸蚀2次组（n=56），记录第4、8和12周托槽脱落率和托槽脱落后牙面上残留的粘接剂残留指数（ARI）。结果：酸蚀2次组和酸蚀2 min组的托槽脱落率明显低于酸蚀1 min组和3 min组（P<0.05）；ARI高于酸蚀1 min组和3 min组(P<0.05）。酸蚀2次组的托槽脱落率低于酸蚀2 min组，但差异无统计学意义(P>0.05）；ARI高于酸蚀2 min组，但差异亦无统计学意义(P>0.05）。各组前磨牙落率均明显高于前牙(P<0.05），酸蚀2次组的前磨牙脱落率低于其他各组(P<0.05）。结论：酸蚀2 min能明显降低氟斑牙托槽脱落率，2次酸蚀比1次酸蚀托槽脱落率降低，尤其是前磨牙托槽脱落率明显降低。

Effects of different etching methods on losing ratio of bond orthodontic brackets in fluorotic teeth

Objective To observe the losing ratio of the bond orthodontic brackets in fluorotic teeth by using different etching methods and find a way to decrease the losing ratio of the bond orthodontic brackets in fluorotic teeth.Methods 226 midrange fluorotic teeth from 14 patients were chosen.The teech were divided into 28 sections according to the direction.Then the 28 sections were randomly divided into four groups: etching 1 min group(n=56),etching 2 min group(n=57),etching 3 min group(n=57) and etching twice g...