Salem Milani Amin, Banifatemeh Alireza, Rahimi Saeed, Jafarabadi Mohammad Asghari
Gen Dent. 2015 May-Jun;63(3):43-6.
While it has been proven that the handling properties of mineral trioxide aggregate (MTA) are improved upon mixing it with propylene glycol (PG), this study sought to evaluate how PG affects the microhardness of MTA in terms of setting quality. MTA was mixed with different proportions of distilled water (DW) and PG to prepare 5 groups (n = 30). The DW/PG percent proportions used in Groups 1-5 were 100/0, 80/20, 50/50, 20/80, and 0/100, respectively. The mixed MTA was condensed into acrylic molds. Half of the samples of each group were evaluated on Day 4, the other half on Day 28. The results indicated that PG reduces the microhardness of MTA, thus adversely affecting its setting process. Group 2 (80% DW/20% PG) best improved the handling of MTA without a significant reduction in setting quality.
虽然已证实将三氧化矿物凝聚体（MTA）与丙二醇（PG）混合后其操作性能会得到改善，但本研究旨在评估PG在凝固质量方面如何影响MTA的显微硬度。将MTA与不同比例的蒸馏水（DW）和PG混合以制备5组（n = 30）。第1 - 5组使用的DW/PG百分比比例分别为100/0、80/20、50/50、20/80和0/100。将混合后的MTA填入丙烯酸模具中。每组样本的一半在第4天进行评估，另一半在第28天进行评估。结果表明，PG会降低MTA的显微硬度，从而对其凝固过程产生不利影响。第2组（80% DW/20% PG）在不显著降低凝固质量的情况下，能最佳地改善MTA的操作性能。
