应用micro-CT评价不同封闭技术的根管充填质量  

Evaluation of the filling quality of different root canal obturation techniques using micro-CT

作　　者：徐海[1] 仇晓慧 张光东[1] 章非敏[3] XU hai;QIU Xiao-hui;ZHANG Guang-dong;ZHANG Fei-min(Department of Conservative Dentistry and Endodontics,Jiangsu Key Laboratory of Oral Diseases,Nanjing Medical University Affiliated Hospital of Stomatology,Nanjing Medical University.Nanjing 210029;Department of Stomatology,Jincheng Town Hospital of Jintan District.Changzhou 213000;Department of Prasthodontics,Jiangsu Key Laboratory of Oral Diseases,Nanjing Medical University Affiliated Hospital of Stomatalo~,Naniing Medical University.Nan]ing 210029,Jiangsu Province,China)

机构地区：[1]南京医科大学口腔疾病研究江苏省重点实验室南京医科大学附属口腔医院牙体牙髓病科,江苏南京210029 [2]常州市金坛区金城镇卫生院口腔科,江苏常州213000 [3]南京医科大学口腔疾病研究江苏省重点实验室南京医科大学附属口腔医院口腔修复科,江苏南京210029

出　　处：《上海口腔医学》2018年第4期349-353,共5页Shanghai Journal of Stomatology

基　　金：国家重点研发计划(2016YFA0201704/2016YFA0201700);江苏高校优势学科建设工程资助项目(2014-37)

摘　　要：目的 :利用micro-CT评价不同封闭技术对根管充填质量的影响。方法 :选取单根管上颌前牙40颗,截冠后,使牙根长度为12 mm。利用ProTaper预备至F3,将处理好的样本随机分为4组(n=10),用牙胶尖和(或)i Root SP分别使用冷侧压法、热牙胶法、单尖法、纯糊剂法完成充填。1周后,应用micro-CT扫描并测量分析根管内存在的间隙,计算各组存在气泡的横截面比例和充填材料整体、冠1/3、中1/3、尖1/3的体积比,采用SPSS 20.0软件包对数据进行统计学分析。结果:热牙胶组存在气泡的横截面比例最少(P<0.05);整体、冠1/3、中1/3热牙胶组的充填材料体积比最大(P<0.05),而尖1/3纯糊剂组的充填材料体积比最大(P<0.05),其他各组间均无显著差异。结论:所有封闭技术均不能避免气泡产生,热牙胶法充填质量最高。PURPOSE： The aim of this study was to evaluate the quality of different root canal obturation techniques by micro-CT. METHODS： Forty single-canal upper incisors were collected and decoronated to obtain 12 mm root segments.The root canals were prepared by using Pro Taper rotary files and allocated into 4 groups randomly（n=10）, then obturated with gutta-percha and（or） iRoot SP by cold lateral compaction（CLC）, continuous wave condensation（CWC）, single core（SC）, sealer-only buckfill（So B） techniques, respectively. Each tooth was then scanned with micro-CT, and the percentage of 3 D volume and 2 D slices of voids and gaps were calculated 1 week later. The data were analyzed using SPSS 22.0 software package. RESULTS： Percentage of cross-sections with voids and gaps in CWC group was significantly less than others（P〈0.05）, and it had a significantly greater filling area in 3 D volume in whole root canal, middle third and coronal third levels（P〈0.05）, while SOB group had the largest filling quality in apical third levels（P〈0.05）. CONCLUSIONS： No filling technology can avoid voids. CWC technology provides the best filling performance.

关 键 词：iRoot SP MICRO-CT 充填质量 

分 类 号：R781.3[医药卫生—口腔医学]