Georgopoulou M K, Wu M K, Nikolaou A, Wesselink P R
Department of Endodontics, Dental School, Athens, Greece.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1995 Sep;80(3):338-44. doi: 10.1016/s1079-2104(05)80392-0.
A fluid transport model study was used to evaluate the sealing ability of five root canal sealers, AH 26, Sealapex, Ketac Endo, Roth, and Kerr EWT, and a dental bonding agent at thicknesses of 0.05 mm (thin layer) and 0.3 mm (thick layer) with 270 standard human root sections obturated with sealer combined with standard gutta-percha cylinders. AH26 and Sealapex sealed more tightly in thick layers, whereas Ketac Endo, Johnson and Johnson Bonding Agent, Roth, and Kerr EWT sealed more tightly in thin layers. In thin layers J&J Bonding sealed more tightly than any other sealer tested. In thick layers AH 26 and Sealapex sealed more tightly than Ketac Endo and J&J Bonding Agent, and these sealed more tightly than Roth and Kerr EWT. These findings indicate that the thickness of the sealer layer significantly influences the sealing of a root canal filling and that the influence of thickness varies depending on the type of sealer.
一项流体传输模型研究用于评估五种根管封闭剂（AH 26、Sealapex、Ketac Endo、Roth和Kerr EWT）以及一种牙科粘结剂在0.05毫米（薄层）和0.3毫米（厚层）厚度时的密封能力，该研究使用270个标准人牙根切片，用封闭剂与标准牙胶尖圆柱体进行充填。AH26和Sealapex在厚层中密封更紧密，而Ketac Endo、强生粘结剂、Roth和Kerr EWT在薄层中密封更紧密。在薄层中，强生粘结剂的密封比其他任何测试的封闭剂都更紧密。在厚层中，AH 26和Sealapex的密封比Ketac Endo和强生粘结剂更紧密，而这两种又比Roth和Kerr EWT密封更紧密。这些发现表明，封闭剂层的厚度显著影响根管充填的密封性，并且厚度的影响因封闭剂类型而异。
