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目的研究Mtwo机用镍钛器械预备感染根管的临床效果。方法选择56例患者共68个感染根管,随机分为Mtwo组(35个)与ProTaper组(33个),Mtwo组采用单一长度技术预备根管,ProTaper组采用冠根向深入法预备根管。分别于预备前后根管内取样,接种,培养,然后检测厌氧菌量的变化;记录两组根管预备所需时间;患牙术后疼痛情况;摄片比较两组根管预备和充填质量。结果两组根管预备后厌氧菌量均明显减少,Mtwo组厌氧菌减少量大于ProTaper组;Mtwo组术后疼痛发生率较高;两组都能在较短时间内完成根管预备,都有较好的根管适充率。结论 Mtwo可以高效的清除根管内感染,有良好的根管成形能力,值得在临床推广应用。
Objective To study the clinical effect of Mtwo machine NiTi apparatus for infection of root canal. Methods A total of 68 infected root canals of 56 patients were selected and randomly divided into two groups: Mtwo group (35) and ProTaper group (33). The root canal was prepared by single length technique in Mtwo group and the root canal . The changes of anaerobic bacteria in the root canal before and after preparation were sampled, inoculated and cultured respectively. The time required for root canal preparation was recorded. The postoperative pain was recorded. The radiography was performed to compare the preparation and filling quality . Results The number of anaerobic bacteria in the two groups of root canal preparation decreased significantly, the reduction of anaerobic bacteria in Mtwo group was greater than that in ProTaper group, the incidence of postoperative pain was higher in Mtwo group. Both groups were able to complete root canal preparation in a short time, Have a good root canal filling rate. Conclusion Mtwo can effectively remove root canal infection, good root canal forming ability, it is worth in the clinical application.