Naseri Mandana, Ahangari Zohreh, Shahbazi Moghadam Mahyar, Mohammadian Manijeh
Department of Endodontics, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Iran Endod J. 2012 Winter;7(1):20-4. Epub 2012 Mar 1.
Providing adequate coronal seal of temporary filling materials is critical for the success of root canal therapy. The aim of this in vitro study was to compare coronal seal ability of three restorative materials over different periods of time.
Ninety-eight molar teeth were selected. Once access cavities were prepared, teeth were divided randomly into three time groups (1 day, 1 week, and 4 weeks). Each group was then subdivided into three groups of 10 teeth. Each subgroup was restored using one of three restorative materials including Coltosol, Cavizol and Zonalin and then incubated in distilled water at 37ºC. The samples were then immersed in 2% methylene blue dye. After rinsing and drying, teeth were sectioned longitudinally and examined for dye penetration. Kruskal-Wallis and Mann Whitney U tests were used to analyze the data.
All experimented materials showed increasing leakage from the 1st day to the 4th week. Zonalin showed more leakage than Coltosol and Cavizol at each time interval (P<0.05), but there was no significant difference between Coltosol and Cavizol.
Coltosol and Cavizol are suitable temporary materials for up to 1 week.
为临时充填材料提供足够的冠部封闭对于根管治疗的成功至关重要。本体外研究的目的是比较三种修复材料在不同时间段的冠部封闭能力。
选取98颗磨牙。制备开髓洞形后，将牙齿随机分为三个时间组（1天、1周和4周）。然后每组再细分为三组，每组10颗牙齿。每个亚组使用三种修复材料之一（包括Coltosol、Cavizol和Zonalin）进行修复，然后在37℃的蒸馏水中孵育。随后将样本浸入2%的亚甲蓝染料中。冲洗并干燥后，将牙齿纵向切片并检查染料渗透情况。使用Kruskal-Wallis和Mann Whitney U检验分析数据。
所有实验材料从第1天到第4周的渗漏均增加。在每个时间间隔，Zonalin的渗漏均多于Coltosol和Cavizol（P<0.05），但Coltosol和Cavizol之间无显著差异。
Coltosol和Cavizol作为临时材料在长达1周的时间内是合适的。
