Comparative Evaluation of the pH of Calcium Hydroxide Powder in Contact with Carbon Dioxide (CO2)

被引：5

作者：

Cavalcante, Amaro de Mendonca ^{[1
,3
]}

de Souza Lima, Jose Carlos ^{[2
]}

Santos, Lucineide de Melo ^{[3
]}

Costa de Oliveira, Paulo Cesar ^{[2
]}

Lisboa Ribeiro Junior, Karlos Antonio ^{[1
]}

Goulart Sant'ana, Antonio Euzebio ^{[1
]}

机构：

[1] Univ Fed Alagoas, Lab Quim Prod Nat LPqRN, IQB, BR-57072970 Maceio, AL, Brazil

[2] Univ Fed Alagoas, Lab Quim Analit, CCEN, BR-57072970 Maceio, AL, Brazil

[3] Univ Fed Alagoas, Fac Odontol, Lab Dent & Endodontia, Ctr Ciencias Saude, BR-57072970 Maceio, AL, Brazil

来源：

MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS | 2010年 / 13卷 / 01期

关键词：

calcium hidroxide; ph evaluation; dioxide carbon;

D O I：

10.1590/S1516-14392010000100002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This work involved an evaluation of calcium hydroxide powder in the absence and presence of CO2. 0.12g of calcium hydroxide powder was used for each of 16 aliquots diluted in 100 mL of deionized water and distributed in 2 samples of 8 aliquots. The indices of pOH, [OH-] and [Ca++] were obtained by mathematical calculations after determining the pH. The results demonstrated that in the presence of CO2, calcium hydroxide showed a marked loss of [OH-] and [Ca++] in relation to the decrease in pH. However, the high alkaline pH of the calcium hydroxide powder was preserved in the absence of CO2, maintaining its reparative and antimicrobial properties.

引用

页码：1 / 4

页数：4

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