摘要
对常规法、逐步后退法和超声法３种方法预备不同弯曲度后牙细小根管的成形作用进行比较研究。结果：逐步后退法术后弯曲度改变及根尖偏移均较少，成形作用较好；而常规法最差。所以认为：预备轻中度弯曲细小根管，逐步后退法为首选；常规法不适用于后牙弯曲细小根管的预备。
A comparison of canal shape produced by rountine preparation technique,ultrasonic technique and step back technique for fine curved canal of posterior teeth was done in this article.The result showed that the canal shape prepared with step back technique was better,for its postoperative angle change and apical transportation were less than the other two groups.On the contrary,the canal shape prepared with rountine technique was worst.Therefore it was concluded that the step back technique was the first choice for preparing the fine curved canal of posterior teeth.Routine technique was not suitable to prepare the fine curved canal of posterior teeth.
出处
《上海口腔医学》
CAS
CSCD
1998年第1期40-42,共3页
Shanghai Journal of Stomatology
