Rekab M S, Ayoubi H Rushdi
Professor, Department of Endodontics, School of Dentistry, Damascus University of Medical Sciences, Damascus, Syria.
J Dent (Tehran). 2010 Fall;7(4):205-13. Epub 2010 Sep 30.
One of the principle purposes of root canal obturation is to obtain hermetic sealing of the root canal system. According to the development of technology, many materials are now used in root canal filling. An in vitro dye leakage study was performed to evaluate the apical sealability of White-colored Mineral Trioxide Aggregate (WMTA) and Gray-colored Portland Cement (GPC) when used alone or as a sealer with gutta-percha points in root canal filling.
Seventy-five single-rooted extracted human teeth were used in this study. After cleaning and shaping, the teeth were randomly divided into five equal groups of 15 teeth each based on the root canal filling material used; Group 1, (WMTA) alone; Group 2, (GPC) alone; Group 3, (Gutta-percha points + WMTA); Group 4, (Gutta-percha points + GPC); Group 5, (Gutta-percha points + AH26). Methylene blue was used to determine the apical leakage. After sectioning the teeth longitudinally, linear dye penetration was measured with a caliper under the stereomicroscope. Data were analyzed by Kruskal-Wallis and one-way ANOVA tests with (P ≤ 0.05) as the level of significance.
The results showed that there were no statistically significant differences among the materials of five groups.
(WMTA) alone, (Gutta-percha points + WMTA), (GPC) alone and (Gutta-percha points + GPC) may be used in the root canal filling.
根管充填的主要目的之一是实现根管系统的密封。随着技术的发展，现在许多材料被用于根管充填。进行了一项体外染料渗漏研究，以评估白色矿物三氧化物凝聚体（WMTA）和灰色波特兰水泥（GPC）单独使用或作为与牙胶尖联合使用的根管充填封闭剂时的根尖封闭性。
本研究使用了75颗单根拔除的人牙。在清理和预备根管后，根据所使用的根管充填材料将牙齿随机分为五组，每组15颗；第1组，单独使用（WMTA）；第2组，单独使用（GPC）；第3组，（牙胶尖 + WMTA）；第4组，（牙胶尖 + GPC）；第组，（牙胶尖 + AH26）。使用亚甲蓝测定根尖渗漏情况。纵向切开牙齿后，在体视显微镜下用卡尺测量染料的线性渗透情况。数据采用Kruskal-Wallis检验和单因素方差分析进行分析，显著性水平为（P≤0.05）。
结果显示五组材料之间无统计学显著差异。
单独使用（WMTA）、（牙胶尖 + WMTA）、单独使用（GPC）以及（牙胶尖 + GPC）均可用于根管充填。
