Coniglio Ivanovic, Magni Elisa, Goracci Cecilia, Radovic Ivana, Carvalho Carlos Augusto, Grandini Simone, Ferrari Marco
Department of Fixed Prosthodontics and Dental Materials, University of Siena, Siena, Italy.
J Endod. 2008 Jan;34(1):83-6. doi: 10.1016/j.joen.2007.10.019.
This study compared the effect of two drills and five cleaning regimens on post space debridement. One hundred extracted premolars were instrumented and obturated with warm vertical compaction of gutta percha. The teeth were divided into two groups according to the drill used to remove gutta percha/sealer and for post space preparation: a Largo drill (Largo; Dentsply, St Quentin en Yvelines, France) or a MTwo-PF drill (Sweden&Martina, Due Carrare, Padova, Italy). The following cleaning regimens were used: EDTA, ultrasonics, ultrasonics + EDTA, phosphoric acid, and distilled water. Scanning electron microscopic images of the post spaces were taken, and the presence of debris and of open dentin tubules were evaluated. The ultrasonics + EDTA, phosphoric acid, and EDTA groups were comparable in open tubules scores for both drills and in debris scores after the use of MTwo-PF (p > 0.05). The ultrasonics and control groups performed significantly worse (p < 0.05). The MTwo-PF drill resulted as effective as the Largo drill in obtaining a good post space cleaning, especially when followed by ultrasonics + EDTA irrigant regimen.
本研究比较了两种钻针和五种清理方案对桩腔清理的效果。选取100颗拔除的前磨牙，采用热垂直加压牙胶进行根管预备和充填。根据用于去除牙胶/封闭剂及制备桩腔的钻针不同，将牙齿分为两组：Largo钻针组（Largo；登士柏，法国伊夫林省圣康坦）和MTwo-PF钻针组（瑞典&玛蒂娜，意大利帕多瓦省杜卡拉雷）。采用以下清理方案：乙二胺四乙酸（EDTA）、超声、超声+EDTA、磷酸和蒸馏水。拍摄桩腔的扫描电子显微镜图像，评估碎屑和开放牙本质小管的存在情况。对于两种钻针，超声+EDTA组、磷酸组和EDTA组在开放小管评分方面相当，在使用MTwo-PF钻针后碎屑评分方面也相当（p>0.05）。超声组和对照组表现明显较差（p<0.05）。MTwo-PF钻针在获得良好的桩腔清理效果方面与Largo钻针一样有效，尤其是在采用超声+EDTA冲洗方案时。
