Postgraduate Program in Endodontics, Universidad Autonoma de Nuevo Leon, Monterrey, Mexico.
Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rio de Janeiro, Brazil.
Int Endod J. 2023 Sep;56(9):1147-1154. doi: 10.1111/iej.13945. Epub 2023 Jun 21.
This study evaluated and compared the shaping ability of four rotary instrument systems in long-oval root canals using microcomputed tomographic (micro-CT) evaluation. Currently, there is no data available on the canal shaping abilities of BlueShaper and DC Taper instruments.
Sixty-four single-rooted mandibular premolars were matched based on similar root canal morphologic features as determined by (micro-CT) and randomly assigned to 1 of 4 experimental groups (n = 16) according to the instrument system used: BlueShaper, TruNatomy, DC Taper and HyFlex EDM One File. Changes in the root canal surface and volume, remaining dentine thickness, and number of prepared areas were assessed.
No significant differences were found amongst the four instrument systems for the parameters evaluated (p > .05). There was a significant reduction in the number of unprepared areas and the remaining dentine thickness after each increase in size of the instruments tested (p < .05).
The four instrument systems perform similarly in long oval root canals. Although none could prepare all canal walls, larger preparations incorporated significantly more surfaces in the final shape.
本研究通过 microCT 评估比较了 4 种旋转器械系统在长椭圆形根管中的成形能力。目前，尚无关于 BlueShaper 和 DC Taper 器械根管成形能力的数据。
根据 microCT 确定的类似根管形态特征，将 64 颗下颌前磨牙配对，并根据使用的器械系统随机分为 4 个实验组（n = 16）：BlueShaper、TruNatomy、DC Taper 和 HyFlex EDM One File。评估根管表面和体积的变化、剩余牙本质厚度和预备区域的数量。
在所评估的参数中，4 种器械系统之间没有发现显著差异（p >.05）。在每次增加测试器械的尺寸后，未预备区域的数量和剩余牙本质厚度都显著减少（p <.05）。
这 4 种器械系统在长椭圆形根管中表现相似。尽管没有一种器械能够预备所有根管壁，但较大的预备会在最终形状中包含更多的表面。
