The Influence of Temperature on Rheological Properties of Three Root Canal Sealers

IF 0.6 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materiale Plastice Pub Date : 2022-07-01 DOI:10.37358/mp.22.2.5596

Milica(Premovic) Cvjeticanin, D. Zorica, V. Krstonošić, Miroslav S Hadnadjev, I. Stojanac, B. Ramić, M. Drobac, L. Petrovic, T. Atanacković

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引用次数: 0

Abstract

Purpose was to determine the viscoelastic properties of three root canal sealers as a function of temperature, time and frequency using dynamic oscillatory measurements. Methods: Measurements were performed on the dynamic oscillatory rheometer set to temperatures: 25�C, 35�C, 40�C and 65�C. Stress sweep and frequency sweep tests were used in order to determine storage moduli G�, loss moduli G�� and complex viscosity η*. Results Higher values of storage compared to loss moduli indicate the more pronounced solid-like behavior of tested materials. EndoREZ showed the highest values of G� and G�� moduli at all temperatures. With temperature increase the G� and G�� moduli of Sealapex and EndoREZ increased while the moduli of AH Plus decreased. With frequency increase all materials showed viscosity decrease exhibiting non-Newtonion, shear-thinning behavior. With temperature increase AH Plus demonstrated viscosity decrease, while the viscosity of Sealapex and EndoREZ increased. Clinical significance: All tested materials were temperature, time and frequency dependent and this dependency varied between them. The obtained results may be used to predict the rheological behavior of root canal sealers in different temperature conditions, thus helping as to estimate optimal handling characteristics for specific clinical applications.

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温度对三种根管封闭剂流变性能的影响

目的是通过动态振荡测量来确定三种根管密封器的粘弹性特性与温度、时间和频率的关系。方法:在动态振荡流变仪上进行测量，设置温度为:25℃、35℃、40℃和65℃。采用应力扫描和频率扫描试验确定了储模G′、损耗模G′和复粘度η*。结果与损耗模量相比，较高的存储值表明被测材料具有更明显的固体样行为。在所有温度下，EndoREZ的G′和G′模量均最高。随着温度的升高，Sealapex和EndoREZ的G′和G′模量增大，而AH Plus的模量减小。随着频率的增加，所有材料的粘度都下降，表现出非牛顿剪切减薄的行为。随着温度的升高，AH Plus的粘度降低，而Sealapex和EndoREZ的粘度增加。临床意义:所有被测材料均具有温度、时间和频率依赖性，且这种依赖性在不同材料之间存在差异。所得结果可用于预测根管密封剂在不同温度条件下的流变行为，从而有助于估计特定临床应用的最佳处理特性。

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来源期刊

Materiale Plastice MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

1.40

自引率

25.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Materiale Plastice, abbreviated as Mater. Plast., publishes original scientific papers or guest reviews on topics of great interest. The Journal does not publish memos, technical reports or non-original papers (that are a compiling of literature data) or papers that have been already published in other national or foreign Journal.