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外文期刊>international endodontic journal
>In vitroevaluation of apical leakage of root canal fillings after in situ obturation with thermoplasticized and laterally condensed gutta‐percha
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In vitroevaluation of apical leakage of root canal fillings after in situ obturation with thermoplasticized and laterally condensed gutta‐percha
SummaryThe purpose of this investigation was to compareIn vitrothe sealing ability of root canal treatments performedIn situwith injected thermoplasticized gutta‐ percha compared with the lateral condensation technique. Thirty single‐rooted teeth with straight canals, due for extraction For orthodontic or periodontal reasons were prepared using a step‐back technique. Teeth were then divided randomly into groups A and B and obturated, respectively, with the sectional injection thermoplasticized gutta‐percha and the lateral condensation techniques. Teeth were extracted after 15 days, immersed in India ink for 3 days and the leakage was determined using area‐metric analysis. The roots were ground transversally and the root portion was incrementaly removed with successive steps of 250 μm each, up to the coronal level of the dye penetration. Every section was photographed with a stereoscopic microscope under the same magnification (×20); 310 photographs were taken. Measurements of the area covered by ink as well as the whole cross‐sectional area of the canal were made from each photograph with the aid of a digitizing computer.The measurements were subjected to non‐parametric statistical analysis. No significant difference was found (P>0.05). The technique of lateral condensation proved to be better in the first five sections (1.2 mm from the foramen) while thermoplasticized gutta‐percha technique was superior in the rest
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机译:摘要本研究的目的是比较原位注射热塑性牙胶与侧向冷凝技术进行的根管治疗的体外密封能力。30 颗直管的单根牙齿,由于正畸或牙周的原因,使用后退技术制备了拔牙。然后将牙齿随机分为 A 组和 B 组,并分别使用分段注射热塑性牙胶和侧向冷凝技术进行闭塞。15 天后拔牙,浸入印度墨水中 3 天,使用面积度量分析确定渗漏。将根部横向研磨,并以每个步骤250μm的连续步骤逐渐去除根部,直至染料渗透的冠状水平。每个切片都用立体显微镜在相同的放大倍率下拍摄(×20);拍摄了310张照片。在数字化计算机的帮助下,从每张照片中测量了墨水覆盖的区域以及运河的整个横截面积。对测量值进行非参数统计分析。差异无统计学意义(P>0.05)。在前五个切段(距孔1.2毫米)中,侧向缩合技术被证明更好,而热塑性牙胶技术在其余部分更胜一筹
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