Nguyen Tuan Anh, Kim Yaelim, Kim Euiseong, Shin Su-Jung, Kim Sunil
Microscope Center, Department of Conservative Dentistry and Oral Science Research Center, Yonsei University College of Dentistry, 50-1 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea.
Department of Electrical & Electronic Engineering, Yonsei University College of Engineering, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea.
J Clin Med. 2019 Jul 7;8(7):984. doi: 10.3390/jcm8070984.
This study aimed to assess the efficacy of canal filling material removal using three different techniques after filling with a Gutta-Percha (GP) cone and calcium silicate-based sealer, by measuring the percentage of volume debris of GP and sealer remaining intracanal with micro computed tomography (micro-CT). The filling material was removed from 30 plastic teeth by a nickel-titanium (Ni-Ti) rotary retreatment system. Final irrigation was performed with 2 mL of saline and 10 specimens were randomly allocated to a conventional group. In the passive ultrasonic irrigation (PUI) group, ultrasonic irrigation was added to the conventional group ( = 10). In the Gentlefile Brush (GF Brush) group, irrigation with GF Brush was added to the conventional group ( = 10). Remaining filling material was measured using micro-CT imaging analysis. The total mean volume of residual filling material after retreatment in the conventional group, PUI group and GF Brush group were 4.84896 mm, 0.80702 mm, and 0.05248 mm, respectively. The percentage of filling material remaining intracanal was 6.76% in the conventional group, 1.12% in the PUI group and 0.07% in the GF Brush group. This study shows that the cleaning effect of the GF Brush system is superior to those of Ni-Ti retreatment files and the PUI system in the apical area.
本研究旨在通过微型计算机断层扫描（micro-CT）测量根管内残留的牙胶尖（GP）和硅酸钙类封闭剂的体积碎屑百分比，评估在使用GP尖和硅酸钙类封闭剂充填后，采用三种不同技术去除根管充填材料的效果。使用镍钛（Ni-Ti）旋转再治疗系统从30颗塑料牙中去除充填材料。用2 mL生理盐水进行最终冲洗，并将10个标本随机分配至传统组。在被动超声冲洗（PUI）组中，在传统组的基础上增加超声冲洗（n = 10）。在Gentlefile Brush（GF Brush）组中，在传统组的基础上增加GF Brush冲洗（n = 10）。使用micro-CT成像分析测量残留的充填材料。传统组、PUI组和GF Brush组再治疗后残留充填材料的总平均体积分别为4.84896 mm³、0.80702 mm³和0.05248 mm³。根管内残留充填材料的百分比在传统组为6.76%，在PUI组为1.12%，在GF Brush组为0.07%。本研究表明，在根尖区，GF Brush系统的清洁效果优于Ni-Ti再治疗锉和PUI系统。
