Siqueira J F, Favieri A, Gahyva S M, Moraes S R, Lima K C, Lopes H P
Department of Dentistry, Estácio de Sá University, Rio de Janeiro, Brazil.
J Endod. 2000 May;26(5):274-7. doi: 10.1097/00004770-200005000-00005.
Endodontic sealers that possess both optimum flow ability and antimicrobial properties may theoretically assist in the elimination of microorganisms located in confined areas of the root canal system. The antimicrobial effects and the flow rate of the following sealers were investigated and compared: Kerr Pulp Canal Sealer EWT, Grossman's Sealer, ThermaSeal, Sealer 26, AH Plus, and Sealer Plus. The agar diffusion test was used to assess the antimicrobial activity of the sealers. In the flow assay, the sealers were placed between two glass slabs and a weight of 500 g was placed on the top of the glass. The diameters of the formed discs were recorded. All root canal sealers tested showed some antimicrobial activity against most of the microorganisms. There were no significant differences between the materials tested (p > 0.05). All root canal sealers also flowed under the conditions of this study. Statistical analysis of the results revealed that AH Plus and Kerr Pulp Canal Sealer EWT had flow values significantly superior to the other sealers tested (p > 0.05). Taken together, these findings suggest that these sealers have the potential to help in the microbial control in the root canal system.
理论上，兼具最佳流动性和抗菌性能的根管封闭剂可能有助于清除位于根管系统狭窄区域的微生物。本研究对以下几种封闭剂的抗菌效果和流动速率进行了调查与比较： Kerr 牙髓根管封闭剂EWT、格罗斯曼封闭剂、ThermaSeal、封闭剂26、AH Plus和Sealer Plus。采用琼脂扩散试验评估封闭剂的抗菌活性。在流动试验中，将封闭剂置于两块玻璃板之间，并在玻璃板顶部放置一个500克的重物，记录形成圆盘的直径。所有测试的根管封闭剂对大多数微生物均表现出一定的抗菌活性。测试材料之间无显著差异（p>0.05）。在本研究条件下，所有根管封闭剂也都具有流动性。结果的统计分析显示，AH Plus和Kerr牙髓根管封闭剂EWT的流动值显著优于其他测试封闭剂（p>0.05）。综上所述，这些研究结果表明，这些封闭剂有潜力帮助控制根管系统中的微生物。
