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该研究的目的是在体外测定在切除的牙根面上的4种牙本质粘接剂的封闭性能以及评估封闭时血污染的效果。 材料和方法 选取80颗拔除的单根管牙进行高压消毒,去除碎屑,拍X线片。任何有龋病、内吸收、牙裂、多根管和多于1个主根尖孔的牙齿都不能包括在此研究中。截冠,在工作长度根管预备至50~#锉,再用3~#～5~#Gates Gliddlen钻和直至70~#锉用后退法完成根管预备。在每个牙根上制成3mm长,呈45°的斜面,然后用NaOCl冲洗,确保根尖孔开放,不用糊剂将标准
The aim of this study was to determine in vitro the blocking properties of four dentin adhesives on the excised root surface and to assess the effect of blood clotting on closure. Materials and Methods 80 single-rooted extracted teeth were autoclaved, debris was removed and X-ray films were taken. Any tooth that has caries, internal resorption, tooth split, multiple tubes, and more than one primary apical foramen can not be included in this study. Coronal closure, in the working length of the root canal preparation to 50 ~ # file, and then 3 ~ # ~ 5 ~ # Gates Gliddlen drill until 70 ~ # file with reverse method to complete root canal preparation. A 3 mm long, 45 ° bevel was made on each root and then rinsed with NaOCl to ensure that the apical foramen was open without the use of a paste