The aim was to examine the effect of retreatment process on the surface roughness and nickel titanium (NiTi) composition of ProTaper Universal Retreatment (PTUR; consists of 3 files; D1, D2, D3) and WaveOne Gold (WOG) (primary) instruments. Twenty extracted mandibular molar teeth with severe curved (30-40°) mesial roots were selected and divided into two groups (n = 10) based on the instrument used for the removal of the root canal filling. Before and after using the instruments in two canals, they were subjected to atomic force microscopy (AFM) and energy dispersive X-ray spectrophotometry (EDX) analysis. The EDX analysis data and roughness average (Ra) and root mean square (RMS) values were analyzed statistically using a one-way analysis of variance and post hoc Tukey's test at the 5% significant level. There was no significant difference between the new and used D1 and D2 PTUR and WOG instruments in terms of the Ni composition (p > .05). The Ti contents of the used D2 and D3 PTUR instruments were lower those of the new instruments (p < .05). In both new and used instruments, PTUR and WOG have no difference in terms of Ra and RMS values. (p > .05). The Ra and RMS values of the PTUR and WOG systems significantly increased after removal of the root canal filling (p < .05). The use of PTUR and WOG instruments for removal of root canal filling in severely curved root canals affected the surface topography of the files. The NiTi composition of the WOG instruments was unaffected by the retreatment process.

译文

:目的是研究再处理工艺对ProTaper通用再处理(PTUR;包括3个文件; D1,D2,D3)和WaveOne Gold(WOG)(主要)仪器的表面粗糙度和镍钛(NiTi)成分的影响。根据用于去除根管充盈的器械,选择二十颗拔除的具有严重弯曲(30-40°)近中根的下颌磨牙,并将其分为两组(n = 10)。在两条运河中使用该仪器之前和之后,都要对它们进行原子力显微镜(AFM)和能量色散X射线分光光度法(EDX)分析。使用单向方差分析和事后Tukey检验在5%显着水平下对EDX分析数据和粗糙度平均值(Ra)和均方根(RMS)值进行统计分析。在新的和使用过的D1和D2 PTUR和WOG仪器之间,在镍成分方面没有显着差异(p> .05)。所用的D2和D3 PTUR仪器中的Ti含量比新仪器要低(p <.05)。在新仪器和旧仪器中,PTUR和WOG的Ra和RMS值都没有差异。 (p> .05)。去除根管充盈后,PTUR和WOG系统的Ra和RMS值显着增加(p <0.05)。使用PTUR和WOG器械去除严重弯曲的根管中的根管充填会影响锉刀的表面形貌。 WOG仪器的NiTi成分不受再处理过程的影响。

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