Kopper Patrícia Maria Poli, Vanni José Roberto, Della Bona Alvaro, de Figueiredo José Antônio Poli, Porto Sérgio
Dental School of Lutheran University of Brazil - Campus Cachoeira do Sul.
J Appl Oral Sci. 2006 Jan;14(1):43-8. doi: 10.1590/s1678-77572006000100009.
This in vivo study evaluated the sealing ability of a resin-based sealer (AH Plus) and a zinc oxide-eugenol sealer (Endofill) in dogs' teeth, exposed to the oral environment for 45 and 90 days. Forty eight lower incisors from 8 dogs were endodonticaly treated. A stratified randomization determined the sealer use in each root canal. All canals were filled using the lateral condensation technique. The excess filling material at the cervical portion of the root canal was sectioned, leaving a 10-mm obturation length inside the canal. Teeth were provisionally sealed with glass ionomer cement for 24 h and the canals were exposed to the oral environment for either 45 or 90 days. Therefore, the experimental groups were as follows: A45- AH Plus for 45 days; A90- AH Plus for 90 days; E45- Endofill for 45 days; and E90- Endofill for 90 days (n=12). After the experimental period, the dogs were killed and the lower jaw was removed. The incisors were extracted and the roots were covered with two coats of nail varnish. The teeth were immersed in India ink for 96 h and submitted to diaphanization. Dye leakage (in mm) was measured using stereomicroscopy (10x magnification). The results were statistically analyzed using two-way ANOVA and Tukey test for multiple comparisons (á = 0.05). Group E90 (2.03+/-0.94) showed significantly higher mean leakage value than all other groups (p<0.001). None of the sealers, in both study conditions, were able to prevent dye leakage.
这项体内研究评估了树脂类封闭剂（AH Plus）和氧化锌丁香酚封闭剂（Endofill）在犬牙中的封闭能力，这些牙齿在口腔环境中暴露45天和90天。对8只犬的48颗下颌切牙进行了根管治疗。采用分层随机化确定每个根管中使用的封闭剂。所有根管均采用侧向加压充填技术进行充填。将根管颈部多余的充填材料切断，使根管内保留10毫米的充填长度。用玻璃离子水门汀临时封闭牙齿24小时，然后将根管暴露于口腔环境中45天或90天。因此，实验组如下：A45 - AH Plus封闭45天；A90 - AH Plus封闭90天；E45 - Endofill封闭45天；E90 - Endofill封闭90天（n = 12）。实验期结束后，处死犬只并取下下颌。拔出切牙，牙根涂两层指甲油。将牙齿浸入印度墨水中96小时，然后进行透明化处理。使用体视显微镜（10倍放大）测量染料渗漏（以毫米为单位）。结果采用双向方差分析和Tukey检验进行统计学分析，用于多重比较（α = 0.05）。E90组（2.03±0.94）的平均渗漏值显著高于所有其他组（p < 0.001）。在两种研究条件下，两种封闭剂均无法防止染料渗漏。
