Shaheen Neveen Ali, Elhelbawy Nahla Gamaleldin, Sherif Dalia Abdelhamid
Endodontic Department, Faculty of Dentistry, Tanta University, Tanta, Egypt.
Dental Biomaterials Department, Faculty of Dentistry, Tanta University, Tanta, Egypt.
Int J Biomater. 2022 Dec 21;2022:7544813. doi: 10.1155/2022/7544813. eCollection 2022.
This study aims to assess the impact of re-establishing apical patency on the quantity of debris extruded through the apex after three supplementary retreatment files (TruNatomy (TRN), WaveOne Gold (WOG), and XP endo Finisher R (XPFR)).
Eighty single-rooted mandibular premolars were prepared with ProTaper Universal rotary systems (PTU) up to F3 and obturated. The samples were divided into two main groups according to the presence or absence of the apical patency ( = 40), GI with apical patency and GII without apical patency. Based on the file system, which was adopted to eliminate the previous filling, each group had four subgroups ( = 10). In GI PTUR and GII PTUR, ProTaper Universal retreatment files (PTUR) were utilized only to remove the most primary filling material (control groups). In the other groups (PTUR) used, it was first followed by supplementary files. The quantity of debris extruded by different retreatment file systems was determined and compared to the corresponding control group with or without apical patency. Data were analyzed using a two-way ANOVA with a post hoc Tukey's multiple comparison test at a 5% significance level.
There was a statistically significant difference among the control and experimental groups. XPFR had the least quantity of extruded debris. Apical patency did not affect the debris extrusion.
All tested files led to a significant apical debris extrusion regardless of apical patency.
本研究旨在评估重新建立根尖通畅性对使用三种补充再治疗锉（TruNatomy（TRN）、WaveOne Gold（WOG）和XP endo Finisher R（XPFR））后通过根尖挤出的碎屑量的影响。
使用ProTaper通用旋转系统（PTU）将80颗单根下颌前磨牙预备至F3并进行充填。根据是否存在根尖通畅性将样本分为两个主要组（每组40颗），GI组有根尖通畅性，GII组无根尖通畅性。基于用于去除先前充填物的锉系统，每组有四个亚组（每组10颗）。在GI PTUR和GII PTUR组中，仅使用ProTaper通用再治疗锉（PTUR）去除最主要的充填材料（对照组）。在其他使用的组（PTUR）中，首先使用补充锉。测定不同再治疗锉系统挤出的碎屑量，并与有或无根尖通畅性的相应对照组进行比较。使用双向方差分析和事后Tukey多重比较检验在5%显著性水平下分析数据。
对照组和实验组之间存在统计学显著差异。XPFR挤出的碎屑量最少。根尖通畅性不影响碎屑挤出。
无论根尖通畅性如何，所有测试的锉都导致显著的根尖碎屑挤出。
