氧化锌丁香油类根管封闭剂粘度对根管封闭性能的影响

摘要] 目的 探讨氧化锌丁香油类根管封闭剂粘度对根管封闭性能的影响。方法 选取60颗单根管牙，随机分成6组。分别用3种不同粘度的氧化锌丁香油封闭剂和Cortisomol封闭剂各三组充填根管。经染料渗透后沿牙体长轴纵向剖开，在体视显微镜下观察根管渗漏染色长度。用扫描电镜观察根管封闭剂与根管壁的密合度。用SPSS 12.0软件作方差分析。结果 3种不同粘度的氧化锌丁香油封闭剂和Cortisomol封闭剂组组间微渗漏长度差异均有显著性，其中氧化锌丁香油封闭剂较稀组的染料渗漏长度最长，Cortisomol封闭剂较稠组的染料渗漏长度最短。结论 适当增加氧化锌丁香油类根管封闭剂的粘度可提高根管的密封程度。

Influence of the viscosity of Zinc Oxide-eugenol-based root canal sealers on the sealability of root fillings

Abstract: Objective To evaluate the sealability of zinc oxide-eugenol-based root canal sealers of different viscosities. Methods: 60 extracted human single-rooted teeth were selected and randomly divided into six groups (n=10). The root canals were respectively filled with Zinc Oxide-Eugenol sealers and Cortisomol sealers of different viscosities. The teeth were split along long axis after dye penetration. The lengths of root apical dye microleakage were measured with stereopsis microscope. The interface of the dentins and the sealers was observed by the SEM. ANOVA of the SPSS12.0 was used to compare the differences. Results: There were differences among groups of Zinc Oxide-Eugenol sealers and Cortisomol sealers of different viscosities (P<0.05). Conclusion: The increment of the viscosity of zinc oxide-eugenol-based root canal sealers can increase the apical sealing ability of sealers in this experiment.