Cıkrık Büşra Nur, İnce Yusufoğlu Selen
Private Turadent Oral and Health Clinic, Istanbul, Türkiye.
Department of Endodontics, Ankara Yıldırım Beyazıt University Faculty of Dentistry, Ankara, Türkiye.
Odontology. 2025 Jul;113(3):1119-1127. doi: 10.1007/s10266-025-01054-z. Epub 2025 Feb 8.
In cases where initial root canal therapy is unsuccessful, retreatment is the first treatment choice. However, when bioceramic-based sealers have been used in the initial treatment, their complete removal can be challenging. The objective of this study was to evaluate the efficacy of three final irrigation activation methods-conventional needle irrigation, passive ultrasonic activation, and EDDY activation-using a scanning electronic microscopy (SEM) to evaluate the removal of bioceramic-based sealers after retreatment. A total of 108 single-rooted teeth were prepared using ProTaper Next rotary files. The samples were obturated with either MTAFillapex or BioSerra (n = 54) and stored for 2 weeks post-obturation. After the retreatment procedures, the teeth were divided into six groups (n = 18 per group) based on final irrigation activation method used. Group1:MTAFillapex-CNI, Group2:BioSerra-CNI, Group3:MTAFillapex-EDDY, Group4:Bioserra-EDDY, Group5:MTAFillapex-UltraX, Group6:Bioserra-UltraX. The roots were sectioned longitudinally, and the coronal, middle and apical parts were investigated under a SEM. The data were then statistically analysed. The EDDY activation technique proved significantly more effective in removing MTA Fillapex across all sections of the root canal (p < 0.001). In contrast, Ultra-X was more effective in removing Bioserra in the middle and apical sections (p = 0.003, p < 0.001). These findings suggest that activation procedures may be preferable for removing bioceramic-based root canal sealer.
在初次根管治疗失败的情况下，再治疗是首选治疗方法。然而，当初次治疗中使用了生物陶瓷类封闭剂时，将其完全清除可能具有挑战性。本研究的目的是评估三种最终冲洗激活方法——传统针管冲洗、被动超声激活和涡旋激活——的效果，使用扫描电子显微镜（SEM）评估再治疗后生物陶瓷类封闭剂的清除情况。总共108颗单根牙使用ProTaper Next旋转锉进行预备。样本用MTAFillapex或BioSerra进行充填（n = 54），充填后储存2周。再治疗程序完成后，根据最终冲洗激活方法将牙齿分为六组（每组n = 18）。第1组：MTAFillapex - 传统针管冲洗，第2组：BioSerra - 传统针管冲洗，第3组：MTAFillapex - 涡旋激活，第4组：BioSerra - 涡旋激活，第组：MTAFillapex - 超声激活，第6组：BioSerra - 超声激活。将牙根纵向切开，在SEM下观察冠部、中部和根尖部分。然后对数据进行统计学分析。结果证明，涡旋激活技术在清除根管各段的MTA Fillapex方面显著更有效（p < 0.001）。相比之下，超声激活在清除中部和根尖段的BioSerra方面更有效（p = 0.003，p < 0.001）。这些发现表明，激活程序可能更有利于清除生物陶瓷类根管封闭剂。
