Acid Neutralization Capacity of a Tricalcium Silicate-Containing Calcium Phosphate Cement as an Endodontic Material.

IF 1.5 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2010-12-01 Print Date: 2010-11-01 DOI:10.6028/jres.115.033

A Maria Cherng, Shozo Takagi, Laurence C Chow

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引用次数: 12

Abstract

A calcium phosphate cement (CPC) was shown to have the necessary attributes for endodontic materials except adequate basicity needed for antimicrobial properties. To enhance its basicity, tricalcium silicate (Ca3SiO5), a highly alkaline compound, was added to CPC at a mass fraction of 0.25, 0.5 or 0.75. The basicity, acid neutralization and physical properties of the CPC-Ca3SiO5 composites were investigated. Mineral trioxide aggregate (MTA) was used as the control. The acid neutralizing capacity of the CPC-Ca3SiO5 composites and MTA were measured by titrating the suspensions of ground set samples with a 0.2 mol / L HCl at predetermined pH levels, i.e., 11, 9.0, and 7.4. The setting time of CPC-Ca3SiO5 composites determined by the Gilmore needle method was 40 ± 10 min. Acid neutralizing capacity of CPC depended (p < 0.05) on Ca3SiO5 content. CPC containing 75 % Ca3SiO5 could neutralize slightly less acid than MTA (p < 0.05), but it had a shorter setting time than that of MTA (> 4 h) and excellent handling properties.

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含硅酸三钙磷酸钙水泥作为牙髓材料的酸中和能力。

磷酸钙水泥(CPC)被证明具有根管材料的必要属性，除了抗菌性能所需的足够的碱性。为了提高其碱度，将高碱性化合物硅酸三钙(Ca3SiO5)以0.25、0.5或0.75的质量分数加入到CPC中。研究了CPC-Ca3SiO5复合材料的碱度、酸中和性和物理性能。以矿物三氧化骨料(MTA)为对照。用0.2 mol / L的HCl在预设的pH值(11、9.0和7.4)下滴定样品悬浮液，测定了CPC-Ca3SiO5复合材料和MTA的酸中和能力。Gilmore针法测定CPC-Ca3SiO5复合材料的凝固时间为40±10 min, CPC的酸中和能力与Ca3SiO5含量有关(p < 0.05)。Ca3SiO5含量为75%的CPC的中和酸能力略低于MTA (p < 0.05)，但凝结时间短于MTA (> 4 h)，处理性能优良。

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来源期刊

Journal of Research of the National Institute of Standards and Technology Engineering-General Engineering

自引率

33.30%

发文量

期刊介绍： The Journal of Research of the National Institute of Standards and Technology is the flagship publication of the National Institute of Standards and Technology. It has been published under various titles and forms since 1904, with its roots as Scientific Papers issued as the Bulletin of the Bureau of Standards. In 1928, the Scientific Papers were combined with Technologic Papers, which reported results of investigations of material and methods of testing. This new publication was titled the Bureau of Standards Journal of Research. The Journal of Research of NIST reports NIST research and development in metrology and related fields of physical science, engineering, applied mathematics, statistics, biotechnology, information technology.