Zarei Mina, Javidi Maryam, Ghoddusi Jamileh, Naghavi Neda, Roohani Ehsan
Department of Endodontics, Member of Dental Research Center, Dental School, Mashad University of Medical Sciences, Mashad, Iran.
Department of Endodontics, Dental School, Mashad University of Medical Sciences, Mashad, Iran.
Iran Endod J. 2007 Spring;2(1):11-4. Epub 2007 Apr 1.
The aim of this study was to compare the sealing ability of Real Seal (RS) and Gutta-percha (GP).
Forty nine extracted human maxillary central incisors were used. The coronal part of each tooth was removed, the root canal was prepared using the crown down technique and apical enlargement to rotary file # 40. The specimens were randomly divided in to 3 groups of 15 each and two control groups of 2 each. Group 1, was obturated with RS and group 2 and 3 were obturated with GP and AH26 sealer by lateral condensation technique. In group 1 and 3 the smear layer was removed by 5mL of 5.25% NaOCl and 3mL of 17% EDTA. Leakage of the obturated roots was measured using the fluid filtration technique. This method was done at 2 min intervals for 8 min. data were analyzed using ANOVA and Tukey tests.
Statistical analysis indicated significant differences between groups 2 with 1 and 3. The most leakage value was observed in the group 2.
Root canal filling with RS or GP in combination with smear layer removal showed better sealing. Therefore the smear layer has more effect one apical leakage than the obturation system.
本研究的目的是比较Real Seal（RS）和牙胶尖（GP）的封闭能力。
使用49颗拔除的人类上颌中切牙。去除每颗牙齿的冠部，采用冠向下技术预备根管并将根尖扩大至40号旋转锉。将标本随机分为3组，每组15个，另有两个对照组，每组2个。第1组用RS充填，第2组和第3组用GP和AH26封闭剂通过侧向加压技术充填。在第1组和第3组中，用5mL 5.25%的次氯酸钠和3mL 17%的乙二胺四乙酸去除玷污层。采用液体过滤技术测量充填根管的渗漏情况。该方法每隔2分钟进行一次，共进行8分钟。数据采用方差分析和Tukey检验进行分析。
统计分析表明第2组与第1组和第3组之间存在显著差异。第2组的渗漏值最高。
RS或GP结合去除玷污层进行根管充填显示出更好的封闭效果。因此，玷污层对根尖渗漏的影响比充填系统更大。
