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首页> 外文期刊>Journal of dentistry >pH changes of self-etching primers mixed with powdered dentine.
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pH changes of self-etching primers mixed with powdered dentine.

机译：混合粉状牙本质的自蚀底漆的pH值变化。

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OBJECTIVES: The purpose of this study was to examine the pH changes of self-etching primers mixed with dentine powder. METHODS: Four self-etching primer adhesive systems were used: Clearfil SE Bond, Imperva Fluoro Bond, Mac Bond II, and Unifil Bond. Dentine discs obtained from extracted bovine incisors were milled and pulverized into a fine powder. The dentine powder was then mixed with solutions of self-etching primers diluted with distilled water. The pH changes of the primer-dentine powder mixtures were measured by a solid-state pH sensor connected to a pH meter at time points 10, 20, 30, 60, 120, 180, 300, and 600s after the start of mixing. Data were analyzed by the Tukey HSD test and the Dunnett test at a significance level of 0.05. RESULTS: The baseline pH values of the self-etching primers ranged from 1.83 to 2.34, with Mac Bond II exhibiting a significantly lower value than the other three products. After mixing with the dentine powder, the pH values significantly increased, ranging from 6.95 to 7.37 at 600s after mixing; there were no significant differences in these values among the self-etching primers used. An insoluble precipitate was formed in the case of Clearfil SE Bond, indicating a chemical reaction between the functional monomer and the dentine powder. CONCLUSIONS: The dentine has a strong buffering capacity against the acidity of self-etching primers.
机译：目的：本研究的目的是研究与牙本质粉混合的自蚀底漆的pH值变化。方法：使用了四种自蚀刻底漆粘合剂体系：Clearfil SE Bond，Imperva Fluoro Bond，Mac Bond II和Unifil Bond。从提取的牛切牙获得的牙本质盘被研磨并粉碎成细粉。然后将牙本质粉末与用蒸馏水稀释的自蚀底漆溶液混合。在混合开始后的10、20、30、60、120、180、300和600s的时间点，通过连接到pH计的固态pH传感器测量底漆-牙本质粉末混合物的pH变化。通过Tukey HSD测试和Dunnett测试分析数据，显着性水平为0.05。结果：自蚀底漆的基线pH值范围为1.83至2.34，其中Mac Bond II的pH值明显低于其他三种产品。与牙本质粉混合后，混合后600 s的pH值显着增加，范围从6.95到7.37。在使用的自蚀底漆之间，这些值没有显着差异。在Clearfil SE Bond的情况下形成了不溶的沉淀物，表明功能性单体与牙本质粉末之间发生了化学反应。结论：牙本质对自蚀底漆的酸性具有很强的缓冲能力。

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