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目的:比较不锈钢K锉(SS)、Hero 642机用镍钛锉(H642)预备根管的临床效果。方法:选取需做根管治疗的患牙120颗,随机分为两组,每组60颗牙,H642组用机用镍钛锉冠向下预备技术预备根管,SS组有不锈钢K型锉逐步后退技术预备根管。两组均采用标准牙胶尖侧向加压技术进行根管充填。记录两组根管预备出现约诊间痛的概率和根管充填后的效果,进行统计分析。结果:H642组出现约诊间痛的概率(8.3%)明显低于SS组(35.0%)(P<0.05),H642组根管适充率(95.0%)明显高于SS组(75.0%),两组比较差异有统计学意义。结论:H642在根管预备中有明显的优越性,能有效降低约诊间痛,适充率高。
Objective: To compare the clinical effects of stainless steel K file (SS), Hero 642 machine nickel titanium file (H642) preparation of root canal. Methods: 120 teeth needed to be treated by root canal were randomly divided into two groups with 60 teeth in each group. The H642 group was prepared with the preparation of root canal by the downward preparation technique of machine nickel-titanium file. The SS group was made of stainless steel K- Gradually retreat technology for root canal preparation. Both groups adopted standard gutta-percha lateral compression technique for root canal filling. Record two groups of root canal preparation about the probability of pain in the clinic and the effect of root canal filling, statistical analysis. Results: The incidence of clinically pain in H642 group was significantly lower than that in SS group (8.3%) (P <0.05), and that in H642 group was significantly higher than that in SS group (95.0%) , The difference between the two groups was statistically significant. Conclusion: H642 in root canal preparation has obvious advantages, can effectively reduce the pain about the clinic, filling rate is high.