■在使用文件系统XPendoShaper进行仪器检查后,评估下颌第一磨牙弯曲近中颊管的运河运输和对中能力,自调整文件(SAF),HyflexEDM,ProTaperNEXT,WaveOneGold,和K文件与锥束计算机断层扫描(CBCT)的帮助。
■评估了90个最近提取的下颌第一磨牙,其近颊根具有25-30度管曲率。术前CBCT扫描后,牙齿被随机分配到六个实验组15。在使用XPendoShaper进行准备之后,SAF,HyflexEDM,ProTaperNext,WaveOneGold,和K文件,使用与术前扫描相同的参数进行仪器后扫描.在3毫米处,6mm,离顶点9毫米,对样品进行运河运输和定心比评估。
■与除SAF外的其他组相比,XPendoShaper的根尖运输最少,结果具有统计学意义。K档案显示根尖向根管侧壁的最高运输。XPendoShaper在保持根管中部和根尖三分之一的定心能力方面更好,SAF在保持冠状三分之一的定心能力方面更好。
■在根管准备中,与其他文件系统相比,XPendoShaper的顶端运输最少,对中能力更好。K文件显示最高的运输。
UNASSIGNED: To assess the canal transportation and centering ability in the mandibular first molars\' curved mesiobuccal canals after instrumentation with file systems XP endo Shaper, self-adjusting File (SAF), Hyflex EDM, Pro Taper NEXT, WaveOne Gold, and K files with the help of Cone-Beam Computed Tomography (CBCT).
UNASSIGNED: Ninety recently extracted mandibular first molars with mesiobuccal roots that had a 25-30 degree canal curvature were assessed. Following preoperative CBCT scans, teeth were allocated randomly to six experimental groups of fifteen. After preparation with XP endo Shaper, SAF, Hyflex EDM, Pro Taper Next, WaveOne Gold, and K files, post-instrumentation scans were taken using same parameters as pre operative scans. At 3 mm, 6 mm, and 9 mm from the apex, samples were assessed for canal transportation and centering ratio.
UNASSIGNED: Apical transportation was least for XP endo Shaper as compared to other groups except SAF and the results were statistically significant. K file showed the highest apical transportation toward the lateral wall of the root canal. XP endo Shaper was better in maintaining centering ability of middle and apical third of canal and SAF was better in maintaining centering ability of coronal third.
UNASSIGNED: In root canal preparation, least apical transportation and better centering ability with XP endo Shaper than other file systems compared. K file showed the highest transportation.