Nabavi Mir Ahmad, Kalantar Motamedi Mahmood Reza, Fattahi Pedram, Khazaei Saber
School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran.
Dental Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
Clin Exp Dent Res. 2025 Feb;11(1):e70059. doi: 10.1002/cre2.70059.
The aim of this study is to investigate the effect of electrical heat carrier temperature on bacterial leakage of root canals obturated with the continuous wave of condensation (CWC) technique and a bioceramic sealer.
This ex vivo experimental study was conducted on 92 extracted single-rooted teeth. The teeth were subjected to endodontic treatment and obturated with the Endoseal MTA bioceramic sealer by the CWC technique using two different temperature settings of the electrical heat carrier: 120°C (group G120, n = 41) and 200°C (group G200, n = 41). A positive and a negative control group were also considered (n = 5 each). Bacterial leakage was assessed over a 40-day period using a bacterial leakage model. The incidence of bacterial leakage was compared between the experimental groups using the log-rank test. The significance level was set at 0.05.
The median survival rate was 39.0 (25.0) days in the G120 group and 34.0 (25.0) days in the G200 group. Despite a slightly higher survival rate in the G120 group, the difference between the two experimental groups was not statistically significant (p = 0.612).
The tested temperatures of the electrical heat carrier (120°C and 200°C) did not have a significant effect on bacterial leakage of root canals obturated by the CWC technique and the Endoseal MTA bioceramic sealer.
本研究旨在探讨电热载体温度对采用连续波热凝技术（CWC）和生物陶瓷封闭剂充填的根管细菌渗漏的影响。
本体外实验研究选取92颗拔除的单根牙进行。对这些牙齿进行根管治疗，采用CWC技术，使用两种不同温度设置的电热载体，用Endoseal MTA生物陶瓷封闭剂进行充填：120°C（G120组，n = 41）和200°C（G200组，n = 41）。还设置了一个阳性对照组和一个阴性对照组（每组n = 5）。使用细菌渗漏模型在40天内评估细菌渗漏情况。采用对数秩检验比较各实验组之间细菌渗漏的发生率。显著性水平设定为0.05。
G120组的中位存活率为39.0（25.0）天，G200组为34.0（25.0）天。尽管G120组的存活率略高，但两个实验组之间的差异无统计学意义（p = 0.612）。
所测试的电热载体温度（120°C和200°C）对采用CWC技术和Endoseal MTA生物陶瓷封闭剂充填的根管细菌渗漏没有显著影响。
