不同超声倒预备尖对根管峡部牙体切割量的比较研究  

A quantitative study of different ultrasonic retrotips in the canal isthmus retropreparation

作　　者：张平娟[1] 陈文霞[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》2015年第2期171-174,共4页Journal of Practical Stomatology

基　　金：广西壮族自治区卫生厅自筹经费科研课题(编号:Z2014093);广西科技厅青年基金(编号:桂科青0339025)

摘　　要：目的:比较研究3种超声倒预备尖对哑铃型牙根根管峡部牙体切割量的差异。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:镍钛尖RE2、金刚砂尖Berutti、25#K锉。显微成像系统和数据分析系统分别测量预备前、后根切面的相关参数并进行计算分析,定量比较3种超声倒预备尖对哑铃型牙根根管峡部牙体切割量的差异。结果:超声波配镍钛尖RE2组对根管峡部牙体切割量明显少于金刚砂尖Berutti组和25#K锉组(P<0.05)。结论:超声波倒预备尖RE2能更有效地保护根管峡部牙体硬组织。Objective：To compare quantitatively the quality of the canal isthmus retropreparation among three kinds of ultrasonic ret-rotips.Methods：1 20 maxillary bicuspid teeth with two canals and an isthmus were randomly assigned to 3 groups（n=40）.The canal isthmus retropreparation were made respectively using ultrasonic niti tip RE2,diamond tip Berutti and #25K file.Image processing and analysis system were used to measure the preoperative and postoperative parameters for further evaluation.Results：The cutting volume of ultrasonic niti tip RE2 group was significantly less than those of other two groups（P〈0.05）.Conclusion：Ultrasonic niti 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：R782[医药卫生—口腔医学]