两种镍钛系统根管预备后发生牙根微裂的体外研究

发布时间：2018-05-24 22:10

本文选题：根管制备 + 牙根微裂　；参考：《北京大学学报(医学版)》2015年01期

【摘要】：目的:比较Hy Flex CM和Pro Taper Universal两种镍钛器械预备根管后,根尖区牙根微裂的发生率。方法:收集60颗完整的离体下颌切牙,使用自凝树脂和藻酸盐印模材料进行包埋,暴露根尖区3 mm。随机分成3组(n=20),对照组不进行根管预备,两个实验组分别使用Hy Flex CM和Pro Taper Universal镍钛器械预备根管至#40/0.06。根管预备后,在距根尖孔1 mm、2 mm、3 mm处进行水平切盘,利用立体显微镜观察并记录牙根不同横截面牙根微裂的产生情况。结果:对照组未观察到牙根裂的产生,Hy Flex CM实验组牙根微裂的发生率为5%(1/20),Pro Taper Universal实验组为85%(17/20),两实验组间牙根裂发生率的差异有统计学意义(P0.01)。结论:以Hy Flex CM镍钛系统进行根管预备产生根尖部牙根微裂的风险明显低于Pro Taper Universal。
[Abstract]:Objective: to compare the incidence of root microfissure in apical region after root canal preparation with Hy Flex CM and Pro Taper Universal. Methods: 60 intact mandibular incisors were collected and embedded with self-coagulating resin and alginate impression materials, and the apical region was exposed to 3 mm. Three groups were randomly divided into three groups, the control group did not perform root canal preparation, the two experimental groups were treated with Hy Flex CM and Pro Taper Universal nickel titanium instruments to prepare the root canal to #40 / 0.06 respectively. After root canal preparation, a horizontal cutting disc was performed at a distance of 1 mm to 2 mm / 3 mm from the apical foramen. The root microcracks in different cross sections of the root were observed and recorded by stereoscopic microscope. Results: the incidence of root microcleavage in Hy Flex CM group was not observed in the control group. The incidence of root microcleavage in Hy Flex CM group was 85 / 17 / 20 / 20 in the control group, and the difference between the two groups was statistically significant (P 0.01). Conclusion: the risk of apical root microfissures in root canal preparation with Hy Flex CM Ni-Ti system is significantly lower than that with Pro Taper Universal..
【作者单位】：北京大学口腔医学院·口腔医院牙体牙髓科;
【分类号】：R781.05

【共引文献】