使用热处埋器械从配对椭圆形根管中取出根管充填材料的三维能力评估。

3-dimensional Ability Assessment in Removing Root Filling Material from Pair-matched Oval-shaped Canals Using Thermal-treated Instruments.

机构信息

Department of Endodontics, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil.

出版信息

J Endod. 2019 Sep;45(9):1135-1141. doi: 10.1016/j.joen.2019.06.003. Epub 2019 Jul 23.

DOI:10.1016/j.joen.2019.06.003

PMID:31350048

Abstract

INTRODUCTION

The purpose of this study was to evaluate the ability of the XP-endo Shaper instrument (FKG Dentaire, La Chaux-de-Fonds, Switzerland) during the removal of root fillings from oval-shaped canals. M-Wire Reciproc and Reciproc Blue systems (VDW, Munich, Germany) were used as reference instruments for comparison, and micro-computed technology was used as an analytical tool.

METHODS

Thirty mandibular incisors with oval-shaped canals were matched based on similar anatomic features of the canal (eg, volume, aspect ratio, and 3-dimensional configuration) after scanning procedures. The canals were prepared with M-Wire Reciproc R25 instruments and filled with gutta-percha and AH Plus sealer (Dentsply DeTrey, Konstanz, Germany) using the continuous wave of condensation technique. Then, the sample was allocated into 3 experimental groups (n = 10) according to the retreatment protocol used: M-Wire Reciproc, Reciproc Blue, and XP-endo Shaper. M-Wire Reciproc R25, Reciproc Blue R25, and XP-endo Shaper instruments were used to remove the root fillings. Apical enlargement was performed with M-Wire Reciproc R40, Reciproc Blue R40, and BioRace BR5 (FKG Dentaire) instruments. Each sample was scanned after each endodontic procedure. The volume of remaining root filling material was quantified before and after apical enlargement. The percentage volumes of root filling reduction in relation to the instrumented canals at both time points (before and after apical enlargement) were calculated and considered for statistical analysis. Data were analyzed statistically with a significance level of 5%.

RESULTS

Reciproc Blue presented significantly lower removal of filling material compared with the XP-endo Shaper (Tukey test, P < .05). No difference was detected either between M-Wire Reciproc and Reciproc Blue (Tukey test, P > .05) or M-Wire Reciproc and XP-endo Shaper (Tukey, P > .05). The increase of apical enlargement significantly improved the removal of root fillings from the root canals (P < .05); this effect was similar for all systems (time point × file system, P > .05).

CONCLUSIONS

The XP-endo Shaper instrument showed a higher percentage of root filling removal, but no differences were observed comparing M-Wire Reciproc with the XP-endo Shaper or Reciproc Blue. The increase of apical enlargement improved the removal of root fillings in all groups. None of them was able to render root canals completely free from root fillings.

摘要

简介

本研究的目的是评估 XP-endo Shaper 器械（FKG Dentaire，La Chaux-de-Fonds，瑞士）在从椭圆形根管中去除根充物时的能力。M-Wire Reciproc 和 Reciproc Blue 系统（VDW，慕尼黑，德国）被用作比较的参考器械，并使用微计算机断层扫描技术作为分析工具。

方法

在扫描程序后，根据根管的类似解剖特征（例如体积、纵横比和三维形态），选择 30 颗下颌切牙作为椭圆形根管的匹配样本。使用 M-Wire Reciproc R25 器械制备根管，并使用连续波冷凝技术填充牙胶和 AH Plus 密封剂（Dentsply DeTrey，康斯坦茨，德国）。然后，根据再治疗方案将样本分为 3 个实验组（n = 10）：M-Wire Reciproc、Reciproc Blue 和 XP-endo Shaper。使用 M-Wire Reciproc R25、Reciproc Blue R25 和 XP-endo Shaper 器械去除根充物。使用 M-Wire Reciproc R40、Reciproc Blue R40 和 BioRace BR5（FKG Dentaire）器械进行根尖扩大。在每个根管治疗程序后对每个样本进行扫描。在根尖扩大前后分别对剩余根充材料的体积进行定量。计算在两个时间点（根尖扩大前后）与器械根管相关的根充减少的百分比体积，并进行统计分析。数据采用显著性水平为 5%进行统计学分析。

结果

Reciproc Blue 与 XP-endo Shaper 相比，根充材料的去除率显著降低（Tukey 检验，P <.05）。M-Wire Reciproc 与 Reciproc Blue（Tukey 检验，P >.05）或 M-Wire Reciproc 与 XP-endo Shaper（Tukey，P >.05）之间均未检测到差异。根尖扩大的增加显著提高了从根管中去除根充物的效果（P <.05）；所有系统的效果相似（时间点×文件系统，P >.05）。