Estrela C, Pesce H F
Faculdade de Odontologia, Universidade Federal de Goiás, Goiánia, GO, Brasil.
Braz Dent J. 1996;7(1):41-6.
The objective of this research is to chemically analyze calcium hydroxide pastes added to three hydrosoluble vehicles having different acid-base characteristics using polyethylene tubes implanted in subcutaneous connective tissue in a dog, evaluating the liberation of calcium and hydroxyl ions over a period of 7, 30, 45 and 60 days. The three vehicles were saline, anesthetic, and polyethylene glycol 400. Chemical analysis of the liberated calcium ions was done by means of conductimetry using EDTA for titration. Liberation of hydroxyl ions was determined by analogy of calcium ions liberated, which are in direct proportion to the molecular weight of calcium hydroxide.
本研究的目的是，通过植入犬皮下结缔组织的聚乙烯管，对添加到三种具有不同酸碱特性的水溶性载体中的氢氧化钙糊剂进行化学分析，评估7天、30天、45天和60天期间钙和氢氧根离子的释放情况。这三种载体分别是生理盐水、麻醉剂和聚乙二醇400。通过使用乙二胺四乙酸（EDTA）进行滴定的电导法对释放的钙离子进行化学分析。氢氧根离子的释放是通过与释放的钙离子类推来确定的，钙离子的释放与氢氧化钙的分子量成正比。
