Department of Endodontics, Faculty of Dentistry, Hatay Mustafa Kemal University, Hatay, Turkey.
Department of Endodontics, Faculty of Dentistry, Hatay Mustafa Kemal University, Hatay, Turkey.
J Endod. 2020 Mar;46(3):419-424. doi: 10.1016/j.joen.2019.11.011. Epub 2020 Jan 21.
The aim of this study was to evaluate the effect of using the XP-endo Finisher (XPF; FKG Dentaire, La Chaux de Fonds, Switzerland) in teeth that have a traditional access cavity (TEC) and a contracted access cavity (CEC) design on the amount of decrease in the number of Enterococcus faecalis bacteria within the root canal system.
Eighty mandibular first molar teeth were selected and randomly divided into 2 groups: TEC and CEC (n = 40/group). After access cavity preparation in the 2 groups, 80 mesiobuccal root canals were contaminated with Enterococcus faecalis for 4 weeks. After the first sampling (S1), in order to perform root canal instrumentation, the TEC and CEC groups were further divided into 4 subgroups (10 teeth/group): Reciproc (VDW GmbH, Munich, Germany) and ProTaper Next (Dentsply Maillefer, Ballaigues, Switzerland) with or without XPF. Bacterial sampling from the root canals was performed with sterile paper points before (S1) and after (S2) instrumentation to determine the bacterial load. The bacterial reduction was counted as colony-forming units/mL and analyzed statistically by 3-factor repeated measures analysis of variance. Multiple comparisons of the main factor effect were performed using the Bonferroni correction (α < .05), all at 5% significance.
The number of E. faecalis bacteria in all the samples with different cavity designs were significantly reduced after instrumentation. The lowest value of bacterial decrease percentage was observed in the CEC-Reciproc-XPF (82.8%) group.
The bacterial reduction counts of E. faecalis were a similar level in the TEC and CEC cavities, and the use of XPF did not show significant differences between groups.
本研究旨在评估在具有传统入口腔（TEC）和收缩入口腔（CEC）设计的牙齿中使用 XP-endo Finisher（XPF；FKG Dentaire，La Chaux de Fonds，瑞士）对根管系统内粪肠球菌数量减少的影响。
选择 80 颗下颌第一磨牙，随机分为 2 组：TEC 和 CEC（每组 n = 40）。在 2 组进行入口腔准备后，80 个近中颊根管被粪肠球菌污染 4 周。在第一次采样（S1）后，为了进行根管器械预备，TEC 和 CEC 组进一步分为 4 个亚组（每组 10 颗牙）：Reciproc（VDW GmbH，慕尼黑，德国）和 ProTaper Next（Dentsply Maillefer，Ballaigues，瑞士），有或没有 XPF。在器械预备之前（S1）和之后（S2）用无菌纸尖从根管中取样，以确定细菌负荷。细菌减少量以菌落形成单位/mL 计数，并通过 3 因素重复测量方差分析进行统计学分析。使用 Bonferroni 校正（α<0.05）对主要因素效应进行多重比较（所有在 5%的显著性水平）。
所有不同腔设计样本中的粪肠球菌数量在器械预备后均显著减少。在 CEC-Reciproc-XPF（82.8%）组中观察到细菌减少百分比的最低值。
TEC 和 CEC 腔中的粪肠球菌细菌减少计数水平相似，使用 XPF 各组之间没有显示出显著差异。
