Adel Mamak, Tofangchiha Maryam, Rashvand Ensiyeh, Moutabha Iman, Roohi Neda, Reda Rodolfo, Testarelli Luca
Department of Endodontics, Dental Caries Prevention Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
Department of Oral and Maxillofacial Radiology, Dental Caries Prevention Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
Acta Stomatol Croat. 2022 Dec;56(4):351-362. doi: 10.15644/asc56/4/2.
Effective tools and methods are applied during root canal retreatment to eliminate root canal obturation materials and preserve the initial root canal anatomy. The present study compared the efficacy of Reciproc, Neoniti, ProTaper, and Hedstrom files in the retreatment of curved root canals.
In the present study, 100 root canals with 25‒45º curvatures were used. After the samples were initially prepared and examined by CBCT, the root canals were obturated with gutta-percha and randomly assigned to four groups (n=25). A retreatment was carried out in each group with NeoNiTi, ProTaper, Reciproc, and Hedstrom files. CBCT examinations were carried out again under the same conditions. The samples were evaluated at 3-, 6-, and 9-mm distances from the apex on the first and the second CBCT image for root canal transportation and remaining gutta-percha in the root canals. The time required for retreating each canal in each sample was recorded. One-way ANOVA and corresponding non-parametric tests were applied for data analysis.
The root canal transportation in the NeoNiTi group was lower than that in the other groups and significantly different from the ProTaper group (P<0.05). There was a remaining gutta-percha after retreatments in all the four groups, which was not statistically significant (P>0.05).
Despite the fact that the NeoNiTi file produced less transportation than other file systems evaluated in the retreatment of curved root canals, all the files were very effective at the clinically acceptable levels.
在根管再治疗过程中应用有效的工具和方法来去除根管充填材料并保留初始根管解剖结构。本研究比较了Reciproc、Neoniti、ProTaper和Hedstrom锉在弯曲根管再治疗中的疗效。
在本研究中，使用了100个弯曲度为25°至45°的根管。样本最初制备并经CBCT检查后，用牙胶进行根管充填，并随机分为四组（n = 25）。每组分别使用NeoNiTi锉、ProTaper锉、Reciproc锉和Hedstrom锉进行再治疗。在相同条件下再次进行CBCT检查。在第一次和第二次CBCT图像上，在距根尖3毫米、6毫米和9毫米处评估样本的根管偏移情况以及根管内残留的牙胶。记录每个样本中每条根管再治疗所需的时间。采用单因素方差分析和相应的非参数检验进行数据分析。
NeoNiTi组的根管偏移低于其他组，且与ProTaper组有显著差异（P < 0.05）。四组再治疗后均有牙胶残留，但差异无统计学意义（P > 0.05）。
尽管在弯曲根管再治疗中，NeoNiTi锉产生的根管偏移比其他评估的锉系统少，但所有锉在临床可接受水平上都非常有效。
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