Nazari Moghadam Kiumars, Teimoori Somaye, Labbaf Hossein, Kazemi Ali, Kavosi Ali, Mahdavi Fateme
Department of Endodontics, , School of Dentistry, Shahed University, Tehran, Iran.
Department of Endodontics, School of Dentistry, Semnan university, Semnan, Iran.
Iran Endod J. 2019 Winter;14(1):35-39. doi: 10.22037/iej.v14i1.21601.
This study aimed to compare the changes in root canal anatomy following the use of PathFile and R-Pilot using cone-beam computed tomography (CBCT).
In this , experimental study, 60 extracted maxillary first and second molars with 20 to 40 mesiobuccal root curvature, minimum of 19 mm of root length, no calcified root canals and no history of previous treatment were divided into two groups (=30). CBCT scans were taken before and after the treatment, and sections at 1, 2 and 3 mm from the apex were compared. Pairwise comparisons were carried out using the Mann Whitney-U test. The centering ratio data were analyzed using the -square test and Fisher's exact test. All statistical analyses were carried out using Sigma Stat 4 software.
The difference between PathFile and R-Pilot in canal transportation in mesiodistal direction was significant at 1 and 2 mm from the apex (<0.01). The R-Pilot file was significantly superior to PathFile in centering ability in mesiodistal direction at 1 mm from the apex (<0.05). Canal transportation direction was towards the mesiolingual and distobuccal in R-Pilot and PathFile groups, respectively.
Within the limitations of this study, the results showed that R-Pilot with reciprocal movement is a safe and easy to use instrument for creating a glide path.
本研究旨在使用锥形束计算机断层扫描（CBCT）比较使用PathFile和R-Pilot后根管解剖结构的变化。
在本实验研究中，将60颗拔除的上颌第一和第二磨牙分为两组（每组30颗），这些磨牙的近中颊根弯曲度为20至40度，根长至少19毫米，无根管钙化且无既往治疗史。在治疗前后进行CBCT扫描，并比较根尖1、2和3毫米处的切片。使用曼-惠特尼U检验进行成对比较。使用卡方检验和费舍尔精确检验分析定心率数据。所有统计分析均使用Sigma Stat 4软件进行。
在距根尖1和2毫米处，PathFile和R-Pilot在近远中方向的根管偏移差异显著（P<0.01）。在距根尖1毫米处，R-Pilot锉在近远中方向的定心能力上显著优于PathFile（P<0.05）。R-Pilot组和PathFile组的根管偏移方向分别朝向近中舌侧和远中颊侧。
在本研究的局限性内，结果表明具有往复运动的R-Pilot是一种安全且易于使用的建立滑行通道的器械。
