【作者】 许婉倩； 薛明；

【Author】 Xu Wanqian;Xue Ming;Department of Endodontics,School and Hospital of Stomatology,China Medical University,Liaoning Provincial Key Laboratory of Oral Diseases;

【机构】 中国医科大学口腔医学院·附属口腔医院牙体牙髓病科,辽宁省口腔医学疾病重点实验室；

【摘要】 目的:比较iRoot SP、C-Root和GuttaFlow2三种根管封闭剂应用于单尖法充填椭圆形根管后的充填率,以此反映根管封闭剂的封闭性能。方法:把35颗有椭圆形单根管的离体前磨牙随机分为4组,其中实验组3个,分别为GuttaFlow2组、iRoot SP组和C-Root SP组,用封闭剂与牙胶尖进行单尖法充填;对照组为NS组,仅用牙胶尖进行单尖法充填。离体牙储存14天后,用Micro-CT扫描,分析并计算充填部分全长和各分段(根上1/3、根中1/3和根尖1/3)的充填率。结果:对于充填部分全长和各分段,各实验组的充填率高于对照组(P<0.05)。对于充填部分全长,iRoot SP和C-Root SP的充填率高于GuttaFlow2(P<0.05)。在根中1/3和根尖1/3处,C-Root SP的充填率高于GuttaFlow2(P<0.05)。在充填部分全长和各分段,iRoot SP和C-Root SP的充填率无明显差异(P>0.05)。结论:使用封闭剂结合牙胶尖充填的封闭效果优于仅使用牙胶尖充填。对于充填部分全长,iRoot SP和C-Root SP的封闭性能优于GuttaFlow2。在根中1/3和根尖1/3处,C-Root SP的封闭性能优于GuttaFlow2。在充填部分全长和各分段处,iRoot SP和C-Root SP有相似的封闭性能。更多还原

【Abstract】 Objective:The aim of this experiment was to evaluate and compare the filling rate of long oval shape root canals filled with different root canal sealers(iRoot SP,C-Root SP and GuttaFlow2),so as to reveal the sealing ability of these sealers.Methods:Thirty-five extracted premolars with single root canal in long oval shape in vitro were randomly divided into 4 groups,including 3 experimental groups,in which root canals were filled with both root canal sealer and gutta-percha using single-cone obturation technique;and a control group,in which root canals were filled with gutta-percha only using single-cone obturation technique.After that,all extracted teeth were storing for 14days,and scanned using Micro-CT.The filling rate of the whole obturated length and 3segments(including coronal,middle and apical third) was calculated.Results:For the whole obturated length and 3 segments,the filling rate of 3 experimental groups were significantly higher than that of control group(P<0.05).For the whole obturated length,the filling rate of iRoot SP and C-Root SP was significantly higher than that of GuttaFlow2 respectively(P<0.05).For the middle and apical third,The filling rate of C-Root SP was significantly higher than that of GuttaFlow2(P<0.05).For the whole obturated length and 3 segments,the filling rate of iRoot SP and C-Root SP was similar(P>0.05).Conclusions:The sealing ability of root canal obturated with root canal sealer was better than that without sealer.For the whole obturated length,iRoot SP and C-Root SP showed better sealing ability than GuttaFlow2.For the middle and apical third,C-Root SP showed better sealing ability than GuttaFlow2.For the whole obturated length and 3 segments,C-Root SP and iRoot SP showed similar sealing ability.更多还原