Moshonov J, Trope M, Friedman S
Department of Endodontics, Hebrew University-Hadassah, Faculty of Dental Medicine, Jerusalem, Israel.
J Endod. 1994 Feb;20(2):90-2. doi: 10.1016/S0099-2399(06)81189-1.
The efficacy of ultrasonic retreatment, 3 months after obturation, in conjunction with Ketac-Endo, Roth's 801, and AH26 sealers was evaluated. Seventy-two root canals were prepared and obturated with gutta-percha and one of the sealers mentioned above. After 90 days, the canals were retreated by an ultrasonic technique and the retreatment time was recorded. The roots were split and the amount of debris that remained on the canal walls in three separate levels was scored. Compared by one-way and two-way analysis of variance, the mean scores of remaining debris at the different canal levels for the three sealer groups, as well as for each group, were not significantly different. The only significant difference was found in retreatment time for which Ketac-Endo was significantly slower to retreat than the other two sealers (p < 0.002). Thus, the results of this study showed that the amount of debris remaining on the root canal walls following retreatment 3 months after obturation is similar for Ketac-Endo, Roth's 801, and AH26 sealers, but the retreatment time for Ketac-Endo is significantly longer.
评估了根管充填3个月后，超声再治疗联合使用Ketac-Endo、Roth's 801和AH26封闭剂的疗效。制备了72个根管，并用牙胶和上述一种封闭剂进行充填。90天后，采用超声技术对根管进行再治疗，并记录再治疗时间。将牙根劈开，对根管壁上三个不同水平残留的碎屑量进行评分。通过单因素和双因素方差分析比较，三个封闭剂组以及每组在不同根管水平的残留碎屑平均评分无显著差异。唯一显著的差异在于再治疗时间，Ketac-Endo的再治疗速度明显慢于其他两种封闭剂（p < 0.002）。因此，本研究结果表明，根管充填3个月后再治疗时，Ketac-Endo、Roth's 801和AH26封闭剂在根管壁上残留的碎屑量相似，但Ketac-Endo的再治疗时间明显更长。
