Evaluation of Selected Properties of Mineral Trioxide Aggregate Sealer Cement
Evaluation of Selected Properties of Mineral Trioxide Aggregate Sealer Cement
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DOI：
10.1016/j.joen.2009.07.008
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发表时间：
2009-10-01
影响因子：
4.2
通讯作者：
Camilleri, Josette
中科院分区：
文献类型：
--
作者：
Camilleri, Josette
简介：将水溶性聚合物添加到矿物三氧化物聚集体（MTA）中，其迄今为止主要用于密封侧向根穿孔和作为根端填充材料，产生了适合用作牙髓充填剂的材料。方法：将MTA与水以4和3.33的粉/液比混合，并加入2 μ L至20 μ L的水溶性聚合物。测试材料的流动性和膜厚度，并确定符合EN ISO 6876第4.3.1、4.3.4（2002）节要求的最佳聚合物量。使用ISO 6876（2002）建议的方法，使用髓腔充填物（PCS）作为对照，测试所得MTA充填物的不透射线性。通过在扫描电子显微镜下评估30天后的浆体微观结构和通过收集50个水化产物的定量分析并将数据绘制为原子比，绘制Al/Ca相对于Si/Ca和S/Ca以及Al/Ca的图，来评估聚合物添加对MTA和硅酸钙水泥的水化特性的影响。结果：MTA的流动性和膜厚符合ISO 6876（2002）要求，需要高聚合物添加量。所得骨水泥的不透射线性低于PCS，但大于国际标准规定的3 mm厚Al。聚合物的加入并没有改变MTA的水化机理。结论：在MTA中添加水溶性聚合物不会改变材料的水合特性，并导致材料具有适合用作牙髓骨水泥的改进的特性。（J Endod 2009，35：1412-1417）
Introduction: The addition of a water-soluble polymer to mineral trioxide aggregate (MTA), which to date has been used primarily to seal lateral root perforations and as a root-end filling material, resulted in material that is suitable for use as an endodontic sealer. Methods: MTA was mixed with water at powder/liquid ratios of 4 and 3.33 and an addition of 2 mu L to 20 mu L of water-soluble polymer. The materials were tested for flow and film thickness, and the optimal quantity of polymer required to conform to EN ISO 6876 Section 4.3.1, 4.3.4 (2002) was determined. The resultant MTA sealer was tested for radiopacity using methods suggested by ISO 6876 (2002) using pulp canal sealer (PCS) as control. The effect of polymer addition on the hydration characteristics of the MTA and calcium silicate cement was evaluated by assessing paste microstructure under the scanning electron microscope after 30 days and by collecting 50 quantitative analyses of the hydration products and plotting the data as atomic ratios, Plots of Al/Ca versus Si/Ca and S/Ca and Al/Ca were drawn. Results: High additions of polymer were required for the flow and film thickness of MTA to conform to ISO 6876 (2002). The resultant cement sealer had a lower radiopacity than PCS but greater than the 3-mm thickness of Al specified by the international standard. The addition of polymer did not modify the hydration mechanism of MTA. Conclusions: The addition of a water-soluble polymer to MTA did not alter the hydration characteristics of the material and resulted in a material with improved properties suitable for use as endodontic sealer cement. (J Endod 2009,35:1412-1417)