da Silva Daylana P, Silva Ingrid Magna R, Falcao Lucas F, Falcao Daniel F, Ferraz Maria Ángela Al, Falcao Carlos Alberto M
Universidade Estadual de Campiñas, Faculdade de Odontologia de Piracicaba, Departamento de Odontologia Restauradora, Piracicaba, Sáo Paulo, Brasil.
Universidade Estadual do Piauí, Faculdade de Odontologia e Enfermagem, Departamento de Odontologia Restauradora, Parnaíba, Piauí, Brasil.
Acta Odontol Latinoam. 2019 Aug 1;32(2):51-56.
The aim of this study was to evaluate the degree of penetration of obturation cement in artificial lateral canals after Passive Ultrasonic Irrigation (PUI) with ethylenediaminetetraacetic acid (EDTA) for different times. Fifty upper molar palatine roots were used, in which two artificial lateral canals were made at distances of 7 and 3 millimeters from the root apex. After instrumentation and drying the canal, the final toilet stage was performed on five groups (n = 10), as follows: G1 - EDTA 17% + PUI for 10 seconds; G2 - EDTA 17% + PUI for 20 seconds; G3 - EDTA 17% + PUI for 30 seconds; G4 - EDTA 17% + PUI for 60 seconds; G5 - EDTA 17% + activation by instrument R50 for 5 minutes (Control). The canals were sealed by the single cone technique, and after 72 hours, sectioned in two planes transverse to the artificial canal, to see the degree of penetration of the sealing cement. In the radiographic analysis, there was no statistical difference (p> 0.05) between groups in the two artificial lateral canals. However, PUI of EDTA for 60 seconds produced a significant difference in the degree of penetration of the sealing cement (p <0.05) at 7 mm from the apex. Therefore, PUI with EDTA for 60 seconds promoted a higher degree of penetration of the obturator cement in the artificial lateral canal.
本研究的目的是评估在使用乙二胺四乙酸（EDTA）进行不同时间的被动超声冲洗（PUI）后，封闭剂在人工侧支根管中的渗透程度。使用了50颗上颌磨牙腭根，在距根尖7毫米和3毫米处制作两条人工侧支根管。根管预备和干燥后，对五组（n = 10）进行最后的冲洗阶段，如下：G1 - 17% EDTA + PUI 10秒；G2 - 17% EDTA + PUI 20秒；G3 - 17% EDTA + PUI 30秒；G4 - 17% EDTA + PUI 60秒；G5 - 17% EDTA + 使用器械R50激活5分钟（对照组）。采用单锥技术封闭根管，72小时后，在与人工根管垂直的两个平面上进行切片，以观察封闭剂的渗透程度。在影像学分析中，两条人工侧支根管的各组之间无统计学差异（p> 0.05）。然而，在距根尖7毫米处，60秒的EDTA PUI在封闭剂的渗透程度上产生了显著差异（p <0.05）。因此，60秒的EDTA PUI促进了封闭剂在人工侧支根管中的更高程度的渗透。
