新型根尖倒充填材料的pH值及钙离子释放情况评估
Evaluation of pH and calcium ion release of new root-end filling materials.
作者信息
de Vasconcelos Bruno Carvalho, Bernardes Ricardo Affonso, Cruz Suyane M Luna, Duarte Marco Antonio Húngaro, Padilha Pedro de Magalhães, Bernardineli Norberti, Garcia Roberto Brandão, Bramante Clóvis Monteiro, de Moraes Ivaldo Gomes
机构信息
Department of Endodontics, Brazilian Dental Association-Ceará Session, Ceará, Brazil.
出版信息
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2009 Jul;108(1):135-9. doi: 10.1016/j.tripleo.2009.02.026. Epub 2009 May 17.
OBJECTIVE
The purpose of this study was to evaluate the pH and calcium ion release of 6 materials used for root-end filling and perforation repair.
STUDY DESIGN
Gray ProRoot MTA, gray MTA-Angelus, white MTA-Angelus, and CPM were compared to 2 experimental ones: MTA-exp, also based in Portland cement with a modified mixing liquid, and MBPc, an epoxy-resin based cement containing calcium hydroxide. After 3, 24, 72, and 168 hours the water in which each sample had been immersed was tested to determine the ph and calcium ion release.
RESULTS
All the analyzed materials showed alkaline pH and capacity to release calcium ions; however, a tendency of reduction of these characteristics was noted for all the analyzed materials, except for the MBPc, which showed a slight increase of pH among the 3 initial periods.
CONCLUSION
The results suggest that all materials investigated presented alkaline pH and ability of release of calcium ions.
目的
本研究旨在评估用于根尖充填和穿孔修复的6种材料的pH值和钙离子释放情况。
研究设计
将灰色ProRoot MTA、灰色MTA-Angelus、白色MTA-Angelus和CPM与2种实验材料进行比较：同样基于波特兰水泥并配有改良混合液的MTA-exp，以及一种含氢氧化钙的环氧树脂基水泥MBPc。在3、24、72和168小时后，对浸泡过每个样品的水进行测试，以确定pH值和钙离子释放情况。
结果
所有分析材料均显示碱性pH值且具有释放钙离子的能力；然而，除MBPc外，所有分析材料均呈现出这些特性降低的趋势，MBPc在最初3个时间段内pH值略有升高。
结论
结果表明，所有研究材料均呈现碱性pH值和释放钙离子的能力。
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