Compressive Strength and Setting Time of MTA and Portland Cement Associated with Different Radiopacifying Agents.

ISRN dentistry Pub Date : 2012-01-01 Epub Date: 2012-08-23 DOI:10.5402/2012/898051

Mario Tanomaru-Filho, Vanessa Morales, Guilherme F da Silva, Roberta Bosso, José M S N Reis, Marco A H Duarte, Juliane M Guerreiro-Tanomaru

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引用次数: 40

Abstract

Objective. The aim of this study was to evaluate the compressive strength and setting time of MTA and Portland cement (PC) associated with bismuth oxide (BO), zirconium oxide (ZO), calcium tungstate (CT), and strontium carbonate (SC). Methods. For the compressive strength test, specimens were evaluated in an EMIC DL 2000 apparatus at 0.5 mm/min speed. For evaluation of setting time, each material was analyzed using Gilmore-type needles. The statistical analysis was performed with ANOVA and the Tukey tests, at 5% significance. Results. After 24 hours, the highest values were found for PC and PC + ZO. At 21 days, PC + BO showed the lowest compressive strength among all the groups. The initial setting time was greater for PC. The final setting time was greater for PC and PC + CT, and MTA had the lowest among the evaluated materials (P < 0.05). Conclusion. The results showed that all radiopacifying agents tested may potentially be used in association with PC to replace BO.

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不同放射性浊化剂对MTA和硅酸盐水泥抗压强度和凝结时间的影响。

目标。本研究的目的是评估MTA和波特兰水泥(PC)与氧化铋(BO)、氧化锆(ZO)、钨酸钙(CT)和碳酸锶(SC)相关的抗压强度和凝结时间。方法。对于抗压强度测试，样品在EMIC DL 2000仪器中以0.5 mm/min的速度进行评估。为了评估凝固时间，每种材料都使用吉尔摩型针进行分析。统计学分析采用方差分析和Tukey检验，显著性为5%。结果。24 h后，PC和PC + ZO值最高。21 d时，PC + BO组抗压强度最低。PC的初始凝固时间更长。PC和PC + CT的最终凝固时间更长，MTA的最终凝固时间最短(P < 0.05)。结论。结果表明，所有测试的放射性增浊剂都可能与PC联合使用以取代BO。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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ISRN dentistry

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