Department of Restorative Dentistry and Endodontics, Faculty of Odontology, Université de Lille, Lille, France; MABLAB, University of Lille, Lille, France.
Faculty of Medicine, Université de Lille, Lille, France; INSERM U1008, Université de Lille, CHU Lille, F-59000 Lille, France.
Eur Endod J. 2023 Mar;8(2):156-161. doi: 10.14744/eej.2022.55376.
The present study aimed to compare the shaping ability of the F6 SkyTaper® (F6S), HyFlex® EDM OneFile (HEDM), and One Curve® (OC) nickel-titanium single-file instruments using micro-computed tomography.
Fifty-two mesiobuccal roots of maxillary first molars, with a degree of curvature between 20° and 42°, were randomised into three experimental groups (n=15 per group): F6S, HEDM, and OC, and a non-instrumented control group (n=7). All specimens were scanned by micro-computed tomography before and after instrumentation. The following parameters were evaluated: preparation time, volume of dentine removed, cutting efficiency, unshaped surfaces, and canal transportation. Cutting efficiency was analysed using an ANOVA parametric test and Tukey's multiple comparison post hoc test. Other parameters were analysed using a non-parametric Kruskall-Wallis test followed by Dunn's multiple comparison post hoc test.
No instrument separation occurred during instrumentation. No significant differences were found between the instrument groups with respect to all the parameters (p>0.05). All the instruments induced morphological changes in the root canal dentine (p<0.05) and tended to increase canal transportation toward the coronal portion of the root canals (p>0.05).
All instruments were able to shape curved canals and preserve their original anatomy. Single-file endodontic procedures with these instruments can be used with comparable changes in the root canal shape with minimal transportation. (EEJ-2022-01-06).
本研究旨在使用微计算机断层扫描比较 F6 SkyTaper®（F6S）、HyFlex® EDM OneFile（HEDM）和 One Curve®（OC）镍钛单文件器械的成形能力。
52 颗上颌第一磨牙近颊根，具有 20°至 42°的弯曲度，随机分为三组（每组 15 个）：F6S、HEDM 和 OC，以及未处理的对照组（n=7）。所有标本在器械处理前后均通过微计算机断层扫描进行扫描。评估以下参数：准备时间、牙本质去除量、切割效率、未成形表面和根管输送。使用方差分析参数检验和 Tukey 多重比较后验检验分析切割效率。使用非参数 Kruskal-Wallis 检验，然后是 Dunn 多重比较后验检验分析其他参数。
在器械处理过程中未发生器械分离。在所有参数方面，各组器械之间均无显著差异（p>0.05）。所有器械均使根管牙本质的形态发生变化（p<0.05），并倾向于增加根管向根管冠部的输送（p>0.05）。
所有器械均能成形弯曲的根管并保持其原始解剖结构。使用这些器械进行单文件牙髓治疗程序可以在根管形状发生相似变化的情况下使用，且输送最小。（EEJ-2022-01-06）。
