Department of Restorative and Prosthetic Dental Sciences, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, National Guard Health Affairs, Riyadh, Kingdom of Saudi Arabia.
King Abdullah International Medical Research Centre, National Guard Health Affairs, Riyadh, Kingdom of Saudi Arabia.
Eur Endod J. 2020 May 14;5(2):123-127. doi: 10.14744/eej.2020.96967. eCollection 2020.
The purpose of this laboratory-based study was to compare the shaping forces and torques developed by the XP Shaper (FKG Dentaire SA, La Chaux-de-fonds, Switzerland) and OneCurve (Micro-Mega, Besancon, France) systems during shaping of narrow canals.
Mandibular premolars with a single canal were divided equally into two groups; XP Shaper and OneCurve (n=16 each). In both groups, the canals were shaped with XP Shaper file (30/01) or OneCurve file (25/O6) that was inserted three times until it reached the canal length. The tooth was surrounded by water under controlled simulated intracanal temperature throughout the experiment. The inward and outward peak forces and the peak torques were recorded and analyzed statistically using the Mann-Whitney test. The shaping times were analyzed using Student's t-test. The significance level was set at 5%.
In both groups, the developed forces in both directions and the torques increased with the successive insertions of the file. In the two groups, the inward peak forces ranged from 0.33 to 3.12 N, while the outward peak forces ranged from 0.09 to 1.96 N. In the three insertions, the XP Shaper showed significantly lower peak forces in both directions. The peak torque developed in both groups ranged from 0.12 to 1.52 N.cm. XP Shaper had significantly lower torque values in all the insertions than OneCurve. The XP Shaper system was able to completely shape the canals in 33.4 seconds while the OneCurve system was able to completely shape the canals in 32.8 seconds.
The XP Shaper system showed favorably lower force and torque values during canal shaping compared with the OneCurve system.
本实验室研究旨在比较 XP Shaper（FKG Dentaire SA，拉绍德封，瑞士）和 OneCurve（Micro-Mega，贝桑松，法国）系统在成形狭窄根管时产生的成形力和转矩。
将具有单根管的下颌前磨牙平均分为两组；XP Shaper 组和 OneCurve 组（每组 16 个）。在两组中，均使用 XP Shaper 锉（30/01）或 OneCurve 锉（25/O6）将根管成形 3 次，直至达到根管长度。在整个实验过程中，牙齿在受控的模拟根管内温度下被水包围。记录向内和向外的峰值力和峰值转矩，并使用 Mann-Whitney 检验进行统计学分析。使用 Student's t 检验分析成形时间。显著性水平设为 5%。
在两组中，随着锉的连续插入，产生的力和转矩在两个方向上均增加。在两组中，向内峰值力范围为 0.33 至 3.12 N，而向外峰值力范围为 0.09 至 1.96 N。在三次插入中，XP Shaper 在两个方向上的峰值力均显著较低。两组的峰值转矩范围为 0.12 至 1.52 N·cm。在所有插入中，XP Shaper 的转矩值均显著低于 OneCurve。XP Shaper 系统能够在 33.4 秒内完全成形根管，而 OneCurve 系统能够在 32.8 秒内完全成形根管。
与 OneCurve 系统相比，XP Shaper 系统在根管成形时显示出有利的较低力和转矩值。
