不同超声倒预备尖对根管峡部预备成型的体外实验比较  

The effects of different ultrasonic retrotips in the canal isthmus retropreparation

作　　者：张平娟[1] 陈文霞[1] 曾启新[1] 谢方方[1] 

机构地区：[1]广西医科大学口腔医学院牙体牙髓科,南宁530021

出　　处：《实用口腔医学杂志》2014年第6期842-845,共4页Journal of Practical Stomatology

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)

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。Objective： To compare the quality of the canal isthmus retropreparation among three ultrasonic retrotips. Methods： 120 maxillary bicuspid teeth with 2 canals and an isthmus were randomly assigned to 3 groups（n=40）. The canal isthmus were retropreparated by ultrasonic Ni-Ti tip RE2,diamond tip Berutti and #25K file respectively. The quality of cavity margin,the number and type of the micro-cracks were evaluated by SEM. Data were statistically analysed by Kruskal Wallis Test of SPSS 13. 0. Results： The cavity margin quality of ultrasonic Ni-Ti tip RE2 group was superior to that of other 2 groups（P=0. 003）; The number of micro-crack in Ni-Ti tip RE2 group was less than that of other 2 groups（P=0. 003）. The type of micro-cracks has no significant difference among the3 groups（P=0. 830）. Conclusion： Ultrasonic Ni-Ti tip RE2 is feasible in the canal isthmus retropreparation.

关 键 词：超声器械 根尖倒预备 根管峡部 

分 类 号：R781.05[医药卫生—口腔医学]