Dantas Wania Christina Figueiredo, Marceliano-Alves Marilia Fagury Videira, Marceliano Eduardo Fagury Videira, Marques Eduardo Fernandes, de Carvalho Coutinho Thais Machado, Alves Flavio R F, Martin Alexandre Sigrist De, Pelegrine Rina Andrea, Lopes Ricardo Tadeu, Bueno Carlos Eduardo da Silveira
Department of Endodontics, São Leopoldo Mandic College, São Leopoldo Mandic Research Institute, Campinas, São Paulo, Brazil.
Department of Endodontics and Dental Research, Iguaçu University, Nova Iguaçu, Brazil.
Eur J Dent. 2023 Jul;17(3):699-705. doi: 10.1055/s-0042-1750694. Epub 2022 Oct 11.
This study compared the shaping ability of the Hyflex CM and XP-endo Shaper rotary file systems in curved mesial canals of mandibular molars using micro-computed tomography.
Seventeen mesial roots of extracted first mandibular molars with two independent mesial canals were scanned before and after root canal preparation with the tested rotatory file systems. Each mesial canal from the same specimen was prepared with one of the two systems. The parameters analyzed were canal centering (transportation) for the cervical, middle, and apical segments, as well as for the entire canal (0-10 mm from the apex); and canal volume increase, canal surface area increase, and unprepared canal walls for two segments, 0 to 4 mm and 0 to 10 mm from the apex.
There was no significant difference between both systems regarding canal centering (transportation), volume increase, and unprepared canal walls for the 0 to 10 mm segment (> 0.05); however, a significant difference was observed for the 0 to 4 mm segment ( <0.01), where the Hyflex CM left 28.46% of unprepared walls and XP-endo Shaper left 13.26%.
The shaping ability of the two tested rotatory file systems in mesial roots of first mandibular molars was similar for all parameters in all the segments evaluated, except for the 0 to 4 mm segment, where XP-endo Shaper left a smaller area of unprepared canal walls than Hyflex CM.
本研究使用微型计算机断层扫描技术，比较Hyflex CM和XP-endo Shaper旋转锉系统在下颌磨牙弯曲近中根管中的塑形能力。
对17颗拔除的下颌第一磨牙的近中根进行扫描，这些根有两条独立的近中根管，分别在使用受试旋转锉系统进行根管预备前后进行扫描。同一样本的每个近中根管使用两种系统中的一种进行预备。分析的参数包括颈段、中段和根尖段以及整个根管（距根尖0 - 10毫米）的根管居中情况（偏移）；以及根尖0至4毫米和0至10毫米两个节段的根管容积增加量、根管表面积增加量和未预备的根管壁情况。
在根管居中情况（偏移）、容积增加以及根尖0至10毫米节段的未预备根管壁方面，两种系统之间无显著差异（>0.05）；然而，在根尖0至4毫米节段观察到显著差异（<0.01），其中Hyflex CM留下28.46%的未预备壁，XP-endo Shaper留下13.26%。
在评估的所有节段中，除了根尖0至4毫米节段外，两种受试旋转锉系统在下颌第一磨牙近中根中的塑形能力在所有参数上相似，在该节段中，XP-endo Shaper留下的未预备根管壁面积比Hyflex CM小。
