Department of Endodontics, School of Dentistry, Aichi-Gakuin University, 2-11 Suemori-dori, Chikusa-ku, Nagoya 464-8651, Japan.
Dent Mater J. 2011;30(1):52-7. doi: 10.4012/dmj.2010-106. Epub 2011 Jan 26.
The purpose of this study was to examine the physical properties of PEMA-TA/HX-based resins including 20 to 100% ethanol, for a root canal filling material. The values of the elastic modulus in the samples including ethanol were more than 250 MPa, being higher than the approximately 40 MPa of Gutte-percha (GP). The values of compressive strain in the samples increased in an ethanol concentration-dependent manner. The weight of samples including ethanol decreased gradually. In the adhesiveness test, the values of PEMA-TA/HX-based resins including ethanol were significantly higher than that of GP (p<0.01). Cohesive fractures were observed in Super-Bond SEALER in the samples including ethanol except for 20%. The results suggest that the new PEMA-TA/HX-based resin cone in combination with resin-based sealer might facilitate "monoblock obturation". The new PEMA-TA/HX-based resin cone developed in the present study may be effective root canal filling material for vertical root fractures.
本研究旨在考察基于 PEMA-TA/HX 的树脂在包括 20%至 100%乙醇在内的各种物理性能，作为根管填充材料。含有乙醇的样本的弹性模量值均超过 250MPa，高于牙胶（Gutte-percha，GP）的约 40MPa。样本的压缩应变值呈乙醇浓度依赖性增加。含有乙醇的样本的重量逐渐减轻。在黏附性测试中，含有乙醇的 PEMA-TA/HX 基树脂的数值显著高于牙胶（p<0.01）。除 20%以外，在含有乙醇的样本中观察到 Super-Bond SEALER 发生内聚性断裂。结果表明，新型 PEMA-TA/HX 基树脂牙胶尖与树脂基封闭剂联合使用可能有助于“单块式封闭”。本研究开发的新型 PEMA-TA/HX 基树脂牙胶尖可能是治疗垂直根折的有效根管填充材料。
