Department of Endodontics, Universitat Internacional de Catalunya, Barcelona, Spain.
Int Endod J. 2010 Jul;43(7):560-4. doi: 10.1111/j.1365-2591.2010.01710.x. Epub 2010 Apr 23.
To evaluate root canal transportation at the major foramen through the use of stainless steel size 08 K-Flex files, size 10 reamers, and XF finger spreaders when used as patency instruments.
One hundred and two mesiobuccal canals of maxillary and mandibular first molars were randomly divided into three groups (34 canals each). Size 08 stainless steel K-Flex files, size 10 stainless steel reamers and stainless steel XF finger spreaders were used as patency instruments in groups A, B and C respectively. The major foramen was photographed before and after instrumentation. The images were superimposed and then evaluated using Photoshop to determine the frequency of apical transportation. The statistic analysis was performed using chi(2)test.
Transportation was detected in 22% of the specimens; 9% in group A, 12% in group B and 44% in group C. Significant differences were observed between groups A and C (P = 0.0025) and between groups B and C (P = 0.0069), but not between groups A and B (P = 1.00).
No transportation was found in the majority of the samples when size 08 K-Flex files and size 10 stainless steel reamers were used. The XF finger spreaders, when used to maintain apical patency, caused the greatest transportation of the major foramen.
通过使用不锈钢 08 号 K 型锉、10 号扩孔钻和 XF 指扩锉作为通畅锉来评估在主要管孔处的根管偏移。
将 102 个上颌和下颌第一磨牙的近颊根管随机分为三组（每组 34 个根管）。分别使用 08 号不锈钢 K 型锉、10 号不锈钢扩孔钻和不锈钢 XF 指扩锉作为 A、B 和 C 组的通畅锉。在器械预备前后拍摄主要管孔的照片。将图像叠加，然后使用 Photoshop 进行评估，以确定根尖偏移的频率。使用卡方检验进行统计分析。
在 22%的标本中检测到偏移；A 组为 9%，B 组为 12%，C 组为 44%。A 组和 C 组（P = 0.0025）以及 B 组和 C 组（P = 0.0069）之间存在显著差异，但 A 组和 B 组之间没有差异（P = 1.00）。
当使用 08 号 K 型锉和 10 号扩孔钻时，大多数样本中没有发现偏移。当使用 XF 指扩锉来维持根尖通畅时，会导致主要管孔发生最大的偏移。
