根管预备模型的建立

摘要

目的:建立标准化的根管预备模型,排除干扰因素,使实验在单一因素条件下进行.方法:根管预备模型由模拟弯曲根管树脂模块(RCM)、根管预备装置、温控力控冲水装置、根管预备器械以及根管数的确定组成.结果:树脂模拟弯曲根管平均硬度(邵氏硬度)为(82.31±2.24)HD,曲率角(α)=61°和曲率半径(R)=5.9 mm,工作长度为18 mm.预备根管时用力为10N,恒温箱的温度变化在±0.5℃,选择冲牙器的喷头直径为2mm,流量是一档和九档,分别为220和270mL/min.ProTaper Universal F1镍钛锉第一个标记环到尖端的长度为(18.10±0.13) mm,转速350 r/min、扭矩3.0 N· cm.结论:通过本实验方法可以控制冲水温度、流量、力度、根管角度等因素,保证实验在单一因素下进行;根管模块可大批量生产,用于研究,减少实验误差.%Objective To establish a standardized model of root canal preparation,eliminating interference factors,and ensuring that the experiment is carried out with a single factor.Methods The model of root canal preparation consisted of simulated curved root canal resin module,root canal preparation device,temperature control and power control device,root canal preparation instrument,and numbers of root canals.Results The average hardness (Shore hardness) of root canal resin model was (82.31± 2.24) HD.The measured angle of curvature was 61 °;the measured radius of curvature was 5.9 mm;the root canal working length was 18 mm.In the root canal preparation,the force was 10 N,and the temperature variation of incubator was within 0.5 ℃,and the diameter of the nozzle of oral irrigator was 2 mm,with a flow of 220 mL/min and 270 mL/min,respectively.ProTaper Universal F1 NiTi files had a length of (18.10 ± 0.13) mm from the first mark ring to the pointed end,a speed of 350 r/rain,and a torque of 3.0 N·cm.Conclusion Through the experimental method,we can control the water temperature,flow,force,and root canal angle,ensuring that the experiment is performed with a single factor.Root canal resin module can be put into mass production.Using root canal resin module in the study can reduce experimental error.