不同超声倒预备尖对根管峡部预备成型的体外实验比较

发布时间：2018-04-28 12:07

本文选题：超声器械 + 根尖倒预备　；参考：《实用口腔医学杂志》2014年06期

【摘要】：目的:比较3种超声倒预备尖对哑铃型牙根根管峡部预备成型的差异。方法:120颗由一个峡部连接2个主根管的哑铃型离体上颌前磨牙,随机均分成3组(n=40),分别用超声波配3种倒预备尖对根管峡部进行倒预备:1镍钛尖RE2,2金刚砂尖Berutti,325#K锉。扫描电镜评价峡部的边缘质量、微裂数目和类型,采用SPSS 13.0软件包进行Kruskal Wallis Test秩和检验。结果:超声波配镍钛尖RE2组预备峡部边缘质量优于金刚砂尖Berutti组和25#K锉组(P=0.003);微裂数目少于金刚砂尖Berutti组和25#K锉组(P=0.003);3组间微裂类型无统计学差异(P=0.830)。结论:超声波配合镍钛尖RE2倒预备更适用于预备根管峡部。
[Abstract]:Objective: to compare the difference of three kinds of ultrasonic preparation tips in root canal isthmus of dumbbell-shaped teeth. Methods one hundred and twenty dumbbell-shaped maxillary premolars connected by one isthmus and two main root canals were randomly divided into three groups. The root canal isthmus was prepared with ultrasonic wave and three kinds of inverted apices, respectively. The Beruttion 325#K file was used to prepare the isthmus of root canal. The edge quality, the number and type of microcleavage of isthmus were evaluated by scanning electron microscope. The rank sum test of Kruskal Wallis Test was performed by SPSS 13.0 software package. Results: the edge quality of the prepared isthmus in the RE2 group was better than that in the Emery tip Berutti group and the 25 #K file group, and the number of microcracks was less than that in the Emery tip Berutti group and the 25 #K file group. Conclusion: ultrasonic wave combined with nickel-titanium tip RE2 inversion preparation is more suitable for root canal isthmus preparation.
【作者单位】：广西医科大学口腔医学院牙体牙髓科;
【基金】：广西科技厅青年基金(编号:桂科青0339025) 广西壮族自治区卫生厅自筹经费科研课题(编号:Z2014093)
【分类号】：R781.05

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