Dumani A, Yilmaz S, Yoldas O, Kuden C
Department of Endodontics, Faculty of Dentistry, Cukurova University, Adana, Turkey.
Niger J Clin Pract. 2017 Mar;20(3):307-312. doi: 10.4103/1119-3077.178920.
The aim of this study was to evaluate the quality of various filling techniques in distal canals of mandibular molars instrumented with different single-file nickel-titanium (NiTi) systems.
A total of 150 distal roots of mandibular molar teeth were randomly assigned into three main groups and instrumented by using Reciproc (VDW, Munich, Germany), WaveOne (Dentsply Tulsa, Tulsa, OK, USA), or One Shape (MicroMega, Besancon, France) NiTi file systems. The roots were then treated using one of five filling techniques: (1) Matched-single-cone, (2) cold lateral compaction with matched gutta-percha (GP) cone, (3) Thermafil filling, (4) System B/Obtura II, and (5) lateral compaction with standardized GP cones. The roots were then sectioned at three levels (coronal, middle, and apical). Photographs were acquired under a stereomicroscope, and the percentage of GP-filled areas (PGFAs), percentage of sealer-filled areas (PSFAs), and voids were measured using the ImageJ software. Comparisons between groups were applied using Student's t-test or one-way ANOVA for normally distributed data. The Mann-Whitney U-test or Kruskal-Wallis test was used when variables were not normally distributed.
Canals filled with the System B/Obtura showed the highest PGFA and lowest PSFA, whereas those filled with matched-single-cone showed the highest PSFA and lowest PGFA (P < 0.05). The cold lateral compaction with matched GP cone group, lateral compaction group, and Thermafil filling group showed no statistically significant differences in PSFA and PGFA (P > 0.05).
System B/Obtura technique appears to be the best technique to properly fill root canals, whereas the matched-single-cone technique in oval-shaped distal canals of mandibular molars was inadequate.
本研究旨在评估使用不同的单根镍钛（NiTi）系统对下颌磨牙远中根管进行预备后，各种充填技术的充填质量。
将150颗下颌磨牙的远中根随机分为三大组，分别使用Reciproc（德国慕尼黑VDW公司）、WaveOne（美国俄克拉何马州塔尔萨登士柏公司）或One Shape（法国贝桑松MicroMega公司）镍钛锉系统进行根管预备。然后，使用以下五种充填技术之一对根管进行处理：（1）匹配单尖法，（2）与匹配牙胶尖（GP）进行冷侧向加压充填，（3）Thermafil充填法，（4）System B/Obtura II法，（5）与标准化GP尖进行侧向加压充填。随后，将根管在三个水平（冠部、中部和根尖部）进行切片。在体视显微镜下拍摄照片，并使用ImageJ软件测量牙胶充填面积百分比（PGFA）、封闭剂充填面积百分比（PSFA）和空隙率。对于正态分布的数据，采用学生t检验或单因素方差分析进行组间比较。当变量不呈正态分布时，使用曼-惠特尼U检验或克鲁斯卡尔-沃利斯检验。
采用System B/Obtura法充填根管的PGFA最高，PSFA最低，而采用匹配单尖法充填的根管PSFA最高，PGFA最低（P < 0.05）。与匹配GP尖进行冷侧向加压充填组、侧向加压充填组和Thermafil充填组在PSFA和PGFA方面无统计学显著差异（P > 0.05）。
System B/Obtura技术似乎是根管恰填的最佳技术，而在下颌磨牙椭圆形远中根管中，匹配单尖法技术充填效果欠佳。
