TY - JOUR A2 - 皮考尼，安德烈AU - 金，Yemi AU - 李，Donghee AU - 金，大-Vin的AU - 金仙杨PY - 2018 DA - 2018年11月25日TI - 根管故障原因分析2516832 VL - - 2018 AB - C形根管SP的本研究的目的是分析各种特性和C形根管的分类和通过检查切除根评价C形根管的根管治疗失败的原因与牙髓显微镜和扫描电子显微镜（SEM）表面。四十二个牙齿C形根管被列入本研究和经历了故意再植手术。手术前，根尖周X线和锥束CT拍摄。根据梅尔顿的冠状和顶层次分类根管配置进行了分析和分类。After injection of 1 : 100,000 epinephrine with 2% lidocaine, the tooth was carefully extracted. After the root-end resection, the resected root surface was examined using an operating microscope and SEM. Mandibular second molars were most frequently involved teeth (90.4%). The most frequently observed root canal configurations were C1 at the coronal level (45.2%) and C3 at the apical 3 mm level (45.2%). The most common cause of failure for a C-shaped root canal treatment was a leaky canal (45.2%), followed by an isthmus (23.8%), missing canal, overfilling, and iatrogenic problems. In conclusion, C-shaped root canals were most frequently found in mandibular second molars. The most common cause of failure was a leaky canal and isthmus. SN - 0161-0457 UR - https://doi.org/10.1155/2018/2516832 DO - 10.1155/2018/2516832 JF - Scanning PB - Hindawi KW - ER -