酸蚀时间对临床托槽粘结效果的影响 齿科美容

　　[摘要]目的：比较10s和60s酸蚀后临床托槽脱落率的差异，从而探讨正畸临床适宜的牙釉质酸蚀处理时间。方法：选择年龄为10～18岁的正畸患者30名，随机分为两组，两组患者按不同牙位分别进行两种时间的酸蚀。酸蚀后常规粘结托槽，每次复诊时分别记录两组托槽脱落数，连续记录6个月。结果：10s酸蚀组总脱落率为8.4％，60s酸蚀组总脱落率为3.2％，前牙托槽脱落数明显少于后牙，最易脱落的托槽为第二前磨牙。结论：建议正畸临床上粘结前牙可使用10s的酸蚀时间。第二前磨牙及腭向错位侧切牙宜适当延长酸蚀时间。
　　[关键词]正畸治疗；酸蚀时间；脱落率
　　[中图分类号]R783.5  [文献标识码]A  [文章编号]1008-6455（2005）05-0600-02

　　　　　　The influence of etching time for clinical bracket bonded effect
　　　　　　　　　　　　　　　　　　　　　　　LUO Zheng
　　　　　　(Department of stomatology, People's Hospital of Luohu borough,Shenzhen 518020,Guangdong Province, China)

　　Abstract: Objective To investigate the most appropriate etching time in orthodontic treatment，by comparing the clinical failure rates of bracket bonded at 10 seconds and 60 seconds etching． Methods  A total of 540 bonds were studied over a period of 3 months．  Results  There were statistical differences between 10 seconds and 60 seconds etching．10 seconds etching failure rates was higher than that of 60 seconds etching, 10 seconds etching failure rates was only 8.4%,furthermore,the failure area was most frequently seen in second premolar． Conclusion 10 seconds etching time can be adopted for anterior tooth in routine clinical use．
　　Key words: orthodontic treatment; etching time; failure rates