Coniglio Ivanovic, Carvalho Carlos Augusto, Magni Elisa, Cantoro Amerigo, Ferrari Marco
Department of Fixed Prosthodontics and Dental Materials, University of Siena, Siena, Italy.
J Endod. 2008 Jun;34(6):752-5. doi: 10.1016/j.joen.2008.03.017.
This study evaluates the effect on post space debridement in oval-shaped canals of an experimental ultrasonic tip with oval section (Satelec) compared with a circular ultrasonic tip (KaVo). Thirty teeth with an oval-shaped canal were endodontically treated and obturated and then randomly divided into 3 groups (n = 10) according to the procedure used for post space debridement: Satelec tip, Largo #2 drill + KaVo file, and Largo #2 drill + water. Debris and dentin tubules were evaluated by assigning scores to scanning electron microscope post spaces images; lower scores corresponded to fewer debris and higher number of open tubules. The Satelec group showed significantly lower debris and open tubules scores than KaVo group (p < .05) and control group (p < .05), which differed significantly between each other (p < .05). Also the debris and open tubules scores in different post space regions differed significantly among the experimental groups (p < .001). The oval ultrasonic tip resulted in a better post space debridement than a circular ultrasonic tip in oval-shaped canals.
本研究评估了一种具有椭圆形截面的实验性超声尖（赛特力）与圆形超声尖（卡瓦）相比，对椭圆形根管桩道清创的效果。选取30颗具有椭圆形根管的牙齿进行根管治疗并充填，然后根据桩道清创所使用的方法随机分为3组（每组n = 10）：赛特力尖组、Largo #2钻 + 卡瓦锉组和Largo #2钻 + 水组。通过对扫描电子显微镜下桩道图像评分来评估碎屑和牙本质小管；分数越低表明碎屑越少，开放小管数量越多。赛特力组的碎屑和开放小管评分显著低于卡瓦组（p < 0.05）和对照组（p < 0.05），而卡瓦组和对照组之间差异也显著（p < 0.05）。此外，不同实验组在不同桩道区域的碎屑和开放小管评分差异也显著（p < 0.001）。在椭圆形根管中，椭圆形超声尖比圆形超声尖能带来更好的桩道清创效果。
