Kumar R Vinod, Shruthi Cs
Department of Conservative Dentistry and Endodontics, Dayanand Sagar College of Dental Sciences Shyavige Malleshwara Hills, Bangalore, Karnataka, India.
J Conserv Dent. 2012 Jul;15(3):274-7. doi: 10.4103/0972-0707.97958.
This study was designed to evaluate the apical seal of root canals obturated with resin cement as a root canal sealer and compare with that of the glass ionomer and zinc oxide eugenol sealers using a cold lateral condensation gutta-percha technique.
Successful root canal treatment requires three-dimensional obturation of the root canal system with nonirritating biomaterials. None of the available materials are capable of providing a fluid tight seal.
The prepared teeth were randomly divided into three groups of 15 each to be obturated using three different sealers. Group I: zinc oxide eugenol (Tubliseal), Group II: Glass ionomer (Ketac Endo), and Group III: resin cement (C & B Superbond). All the specimens were stored in 100% relative humidity at 37° for 24 h. The specimens were placed in 2% methylene blue dye for 48 h and sectioned. The dye penetration was evaluated under a stereomicroscope.
The "Kruskal" Wallis test was carried out to test the equality of mean. All the specimens showed dye leakage, and there was a statistically significant difference (P < 0.0001) among the groups. The specimens in Group III showed a minimal leakage and the specimens in Group I showed a maximum leakage.
Resin cement sealed the root canals significantly better when compared with zinc oxide eugenol and glass ionomer sealers.
本研究旨在评估使用树脂水门汀作为根管封闭剂根管充填后的根尖封闭性，并采用冷侧向加压牙胶技术将其与玻璃离子水门汀和氧化锌丁香酚封闭剂的根尖封闭性进行比较。
成功的根管治疗需要使用无刺激性生物材料对根管系统进行三维充填。现有的材料均无法提供完全密封。
将预备好的牙齿随机分为三组，每组15颗，分别使用三种不同的封闭剂进行充填。第一组：氧化锌丁香酚（Tubliseal）；第二组：玻璃离子水门汀（Ketac Endo）；第三组：树脂水门汀（C & B Superbond）。所有标本在37°、相对湿度100%的环境中保存24小时。将标本置于2%亚甲蓝染料中48小时后进行切片。在体视显微镜下评估染料渗透情况。
采用“Kruskal”Wallis检验来检验均值是否相等。所有标本均出现染料渗漏，且各组间存在统计学显著差异（P < 0.0001）。第三组标本的渗漏最少，第一组标本的渗漏最多。
与氧化锌丁香酚和玻璃离子水门汀封闭剂相比，树脂水门汀对根管的封闭效果明显更好。
