The present micro‐computed tomography (micro‐CT) study compared the presence of voids in the band‐shaped isthmuses obturated by warm vertical compaction (WVC) and single‐cone (SC) techniques. Twenty mesial roots from mandibular first molar teeth showing a band‐shaped isthmus were selected and assigned into two groups based on their preoperative anatomical dimensions (n = 10), according to the filling technique: WVC or SC. Post‐filling micro‐CT scanning was performed. The percentage volume of root canal filling materials and voids were calculated and data were analyzed using the Mann–Whitney U test with a significance level of 5 and 95% confidence interval. Mean percentage volumes of filling materials and voids were 86.88 ± 8.53 and 13.11 ± 8.53 for the WVC group, 84.39 ± 8.30 and 15.60 ± 8.30 for the SC group, respectively, with no significant difference between them (p > .05). Neither WVC nor SC produced void‐free root canal fillings in the band‐shaped isthmuses and both techniques resulted in a similar quality of root canal filling.

中文翻译：

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使用微型计算机断层摄影术对带状地峡中的温暖垂直压实和单锥孔封闭后是否存在空隙进行了幻像研究

目前的微计算机断层扫描（micro-CT）研究比较了通过温暖的垂直压实（WVC）和单锥（SC）技术阻塞的带状峡部空隙的存在。根据下颌第一磨牙的术前解剖尺寸（n = 10），根据其填充技术，选择20个具有带状地峡的近中牙根，并将其分为两组：WVC或SC。进行了灌装后的微CT扫描。使用Mann-Whitney U计算了根管填充材料和空隙的百分比体积并分析了数据显着性水平为5和95％置信区间。WVC组的填充材料和空隙的平均百分比体积分别为86.88±8.53和13.11±8.53，SC组分别为84.39±8.30和15.60±8.30，两者之间无显着性差异（p  > .05）。WVC和SC均未在带状峡部中产生无空隙的根管充填，并且两种技术均导致了类似的根管充填质量。