ProFile ProTaper镍钛根管器械与不锈钢K锉预备弯曲根管的比较研究

目的：比较ProFile镍钛机用根管器械，ProTaper镍钛手用根管器械和不锈钢K锉用于弯曲根管预备时的根管拉直和根尖偏移，为ProFile和ProTaper的临床应用提供实验依据。方法：将正畸前减数拔除的30个下颌第一前磨牙随机分为3组，分别用不锈钢K锉、ProTaper镍钛手用根管器械、ProFile镍钛机用根管器械做根管预备，分析评价其根管拉直和根尖偏移情况。结果：不锈钢K锉组的根管拉直、根尖偏移显著大于ProTaper和ProFile预备组。结论：ProFile和ProTaper镍钛根管预备器械与传统的不锈钢器械相比更适合弯曲根管的根管预备。

Comparative study on curved root canal preparation with ProFile NiTi rotary instruments, ProTaper NiTi hand instruments and stainless steel K-files

AIM:: To compare the root canal straightening and the apical transportation by using three types of instruments to prepare curved root canals and offer experimental evidences for the ProFile and ProTaper's clinic implement.METHODS: Thirty extracted mandibular first premolars were divided into three groups.Group SS was prepared with stainless steel K-files,group PT with ProTaper NiTi hand instruments,and group PF with ProFile NiTi rotary instruments.After preparations the straightening of curved root canals and the apical transportation were compared.RESULTS: The straightening degree of root canals and the apical transportation in group SS were bigger than those of the other two groups.CONCLUSION: The ProFile NiTi rotary instruments and ProTaper NiTi hand instruments are more suitable to the curved root canal's preparation than the stainless steel files.