Physical and Chemical Properties of New-generation Endodontic Materials
Physical and Chemical Properties of New-generation Endodontic Materials
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DOI：
10.1016/j.joen.2009.11.012
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发表时间：
2010-03-01
影响因子：
4.2
通讯作者：
Watanabe, Ikuya
中科院分区：
文献类型：
--
作者：
Porter, Micah L.;Berto, Antonio;Watanabe, Ikuya
简介：白色和灰色的矿物三氧化物聚集体（MTA）在牙髓治疗中有许多用途，但由于其难以处理的特性而受到限制。本研究比较了白色MTA（WMTA）与三种实验性根端充填材料的物理和化学性质：Capasio（Primus Consulting，布拉登顿，FL）、Ceramicrete-D（塔尔萨牙科专业/阿贡国家实验室，阿贡，IL）和Generex-A（Dentsply塔尔萨牙科专业，塔尔萨，OK）。方法：采用国际标准化组织（ISO）6876方法检测固化时间和不透射线性。抗压强度按照ISO 9917方法测量。在混合后测量材料的pH。开发了一种新的测试方法，用于测试材料在放置后立即的耐冲刷性。通过方差分析和Sidak事后分析（p < 0.05）比较抗压强度和抗冲刷性的数据。结果：Generex-A的凝固时间是WMTA的一半。所有材料均符合ISO 6876的不透射线性要求。7天后的抗压强度按以下顺序降低：Generex-A > Capasio > WMTA > Ceramicrete-D。Capasio和Generex-A的初始pH值为碱性，与WMTA相似，而Ceramicrete-D的初始pH值为酸性。值得注意的是，替代材料在冲洗试验后仍留在原位，而WMTA从后处理中被取代。结论：替代材料的临床操作和耐冲洗性远上级WMTA。不透射线性、抗压强度和抗冲洗性使Generex-A和Capasio材料适合进一步研究。Ceramicrete-D较弱，不透射线性较低，最初呈酸性。（J Endod 2010;36：524-528）
Introduction: Mineral trioxide aggregate (MTA), white and gray, has many uses in endodontic therapy but is limited by its difficult handling characteristics. This study compared the physical and chemical properties of white MTA (WMTA) with three experimental root-end filling materials: Capasio (Primus Consulting, Bradenton, FL), Ceramicrete-D (Tulsa Dental Specialties/Argonne National Laboratory, Argonne, IL), and Generex-A (Dentsply Tulsa Dental Specialties, Tulsa, OK). Methods: The setting time and radiopacity were tested using International Organization for Standardization (ISO) 6876 methods. Compressive strength was measured following the ISO 9917 method. The pH of the materials was measured after mixing. A novel test was developed for washout resistance of the materials immediately after placement. Data were compared by analysis of variance and Sidak post hoc analysis (p < 0.05) for compressive strength and washout resistance. Results: The setting time of Generex-A was half that of WMTA. All materials met the ISO 6876 requirements for radiopacity. The compressive strengths after 7 days decreased in this order: Generex-A > Capasio > WMTA > Ceramicrete-D. The initial pH of Capasio and Generex-A were alkaline, similar to WMTA, whereas that of Ceramicrete-D was acidic. Significantly, alternative materials remained in situ after the washout test, whereas WMTA was displaced from the retropreparations. Conclusions: The clinical handling and washout resistance of the alternative materials were far superior to WMTA. The radiopacity, compressive strength, and washout resistance make Generex-A and Capasio materials suitable for further study. Ceramicrete-D was weaker, less radiopaque, and initially acidic. (J Endod 2010;36:524-528)