Abbaszadegan Abbas, Sedigh Shams Mahdi, Jamshidi Yasin, Parashos Peter, Bagheri Rafat
Department of Endodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Students' Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Aust Endod J. 2015 Dec;41(3):117-21. doi: 10.1111/aej.12101. Epub 2015 Feb 6.
The aim of this study was to evaluate the effect of adding 10% calcium chloride (CaCl2) on the setting time, solubility and the pH of calcium-enriched mixture (CEM) cement. Setting time was assessed in accordance with American Dental Association specification N°57. Solubility was measured at 24 and 72 h, 7 and 14 days in hydrated and dehydrated conditions by calculating weight change. The pH of MiliQ water in which the CEM cement samples were immersed was measured immediately after each time interval with and without the addition of CaCl2. The data were analysed using the Mann-Whitney U-test and the Student's t-test. The initial setting time was significantly decreased after the addition of 10% CaCl2. The pH of water increased immediately when in contact with the cements in both groups. The weight loss of hydrated and dehydrated specimens was more than 3% and was significantly reduced by the addition of 10% CaCl2.
本研究的目的是评估添加10%氯化钙（CaCl2）对富钙混合物（CEM）水泥的凝固时间、溶解度和pH值的影响。凝固时间根据美国牙科协会规范第57号进行评估。通过计算重量变化，在水合和脱水条件下，于24小时和72小时、7天和14天测量溶解度。在每个时间间隔后，立即测量浸泡有CEM水泥样品的MiliQ水中有无添加CaCl2时的pH值。使用曼-惠特尼U检验和学生t检验对数据进行分析。添加10%CaCl2后，初凝时间显著缩短。两组水泥与水接触时，水的pH值立即升高。水合和脱水试样的重量损失超过3%，添加10%CaCl2后显著降低。
