Nazarimoghadam Kiumars, Daryaeian Mohammad, Ramazani Nahid
Associate Professor, Department of Endodontics, Shahed University, Tehran, Iran.
Assistant Professor, Children and Adolescent Health Research Center, Department of Endodontics, Zahedan University of Medical Sciences, Zahedan, Iran.
J Dent (Tehran). 2014 Sep;11(5):554-9. Epub 2014 Sep 30.
The aim of ideal canal preparation is to prevent iatrogenic aberrations such as transportation. The aim of this study was to evaluate the root canal transportation by Reciproc file with and without glide path.
Thirty acrylic-resin blocks with a curvature of 60° and size#10 (2% taper) were assigned into two groups (n= 15). In group 1, the glide path was performed using stainless steel k-files size#10 and 15 at working length In group 2, canals were prepared with Reciproc file system at working length. By using digital imaging software (AutoCAD 2008), the pre-instrumentation and post-instrumentation digital images were superimposed over, taking the landmarks as reference points. Then the radius of the internal and external curve of the specimens was calculated at three α, β and γ points (1mm to apex as α, 3mm to apex as β, and 5mm to apex as γ). The data were statically analyzed using the independent T-test and Mann-Whitney U test by SPSS version 16.
Glide path was found significant for only external curve in the apical third of the canal; that is, 5mm to apex (P=0.005). But in the other third, canal modification was not significant (P> 0.008).
Canal transportation in the apical third of the canal seems to be significantly reduced when glide path is performed using reciprocating files.
理想的根管预备目的是预防诸如根管偏移等医源性异常情况。本研究的目的是评估使用和不使用引导通路时Reciproc锉的根管偏移情况。
将30个弯曲度为60°、尺寸为#10（锥度2%）的丙烯酸树脂块分为两组（n = 15）。在第1组中，使用尺寸为#10和15的不锈钢K锉在工作长度处制备引导通路。在第2组中，使用Reciproc锉系统在工作长度处预备根管。通过使用数字成像软件（AutoCAD 2008），将预备前和预备后的数字图像进行叠加，以标志点作为参考点。然后在三个α、β和γ点（距根尖1mm为α，距根尖3mm为β，距根尖5mm为γ）计算标本内外曲线的半径。使用SPSS 16版的独立T检验和曼-惠特尼U检验对数据进行统计学分析。
发现引导通路仅对根管根尖三分之一处的外曲线有显著影响；即距根尖5mm处（P = 0.005）。但在其他三分之一处，根管形态改变不显著（P > 0.008）。
当使用往复式锉进行引导通路制备时，根管根尖三分之一处的根管偏移似乎会显著减少。
