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, China. E-mail:
Shanghai Kou Qiang Yi Xue. 2018 Aug;27(4):349-353.
The aim of this study was to evaluate the quality of different root canal obturation techniques by micro-CT.
Forty single-canal upper incisors were collected and decoronated to obtain 12 mm root segments. The root canals were prepared by using ProTaper 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 (SoB) techniques, respectively. Each tooth was then scanned with micro-CT, and the percentage of 3D volume and 2D slices of voids and gaps were calculated 1 week later. The data were analyzed using SPSS 22.0 software package.
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 3D 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).
No filling technology can avoid voids. CWC technology provides the best filling performance.
本研究旨在通过显微CT评估不同根管充填技术的质量。
收集40颗单根管上颌切牙，截冠后获得12mm的牙根段。使用ProTaper旋转锉预备根管，随机分为4组（n = 10），然后分别采用冷侧方加压（CLC）、连续波热压充填（CWC）、单尖法（SC）、仅用封闭剂回充（SoB）技术，用牙胶和（或）iRoot SP进行充填。然后对每颗牙齿进行显微CT扫描，1周后计算根管内空隙和间隙的三维体积百分比和二维切片百分比。数据采用SPSS 22.0软件包进行分析。
CWC组有空隙和间隙的横截面百分比显著低于其他组（P < 0.05），在整个根管、中1/3和冠1/3水平的三维体积中，其充填面积显著更大（P < 0.05），而SoB组在根尖1/3水平的充填质量最大（P < 0.05）。
没有一种充填技术可以避免空隙。CWC技术提供了最佳的充填性能。
