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首页> 外文期刊>Journal of Conservative Dentistry >Detection of residual obturation material after root canal retreatment with three different techniques using a dental operating microscope and a stereomicroscope: An in vitro comparative evaluation
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Detection of residual obturation material after root canal retreatment with three different techniques using a dental operating microscope and a stereomicroscope: An in vitro comparative evaluation

机译：使用牙科手术显微镜和体视显微镜通过三种不同技术检测根管再治疗后残留的闭孔材料：体外比较评估

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Aim:The study was designed to compare the efficiency of three different methods used for retreatment using a dental operating microscope (DOM) and a stereomicroscope and to evaluate and compare the two methods for detection of residual obturation material after retreatment.Background:The DOM can play an important role in the successful retreatment by detecting the remaining obturation material.Materials and Methods:Thirty extracted maxillary central incisors were collected and obturated after biomechanical preparation. The samples were divided into three groups depending on the method of retreatment: Group I, H-files; Group II, ProTaper Universal retreatment files; and Group III: H-files + Gates-Glidden drills, with 10 samples in each group. After retreatment, the samples were observed under a DOM for detection of residual obturation material. Later, the teeth were cleared and observed under a stereomicroscope for detecting the remaining filling material. The results were subjected to the Spearman's rank order test and other statistical analysis.Results:The maximum cleanliness of the root canal walls was seen in Group I while Group II showed the least. The difference between the mean scores obtained with a DOM and a stereomicroscope was statistically significant (P = 0.05).Conclusion:None of the techniques could completely remove the obturation material. The root canal cleanliness is best achieved when retreatment is performed under a DOM.
机译：目的：本研究旨在比较三种不同方法的使用牙科手术显微镜（DOM）和体视显微镜进行再治疗的效率，并评估和比较两种方法用于在再治疗后检测残留闭塞材料的效率。材料和方法：生物机械准备后，收集并提取30颗拔除的上颌中切牙并进行封闭。根据再处理的方法将样品分为三组：第一组，H型锉刀;第二组，H型锉刀。第二组，ProTaper Universal再处理文件;第三组：H型锉刀+ Gates-Glidden钻，每组10个样品。重新处理后，在DOM下观察样品以检测残留的充填材料。之后，清洁牙齿并在立体显微镜下观察以检测剩余的填充材料。结果进行了Spearman等级排序测试和其他统计分析。结果：第一组的根管壁清洁度最高，第二组的根管壁清洁度最低。 DOM和立体显微镜的平均得分之间的差异具有统计学意义（P = 0.05）。结论：没有一种技术可以完全去除闭塞材料。当在DOM下进行再治疗时，最好达到根管清洁度。

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