Comparative Evaluation of Surface Microhardness of Zirconia-reinforced Glass Ionomer Cement and Conventional Glass Ionomer Cement after Immersion in an Acidic Drink: An In Vitro Study.

Q3 Dentistry
Tarandeep Kour, Prinka Shahi, Suma Sogi, Roopam Kapoor, Neetu Jain, Apurva Gambhir
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Abstract

Background: Microhardness is one of the most imperative physical characteristics for comparative study of dental material. Under acidic conditions, restorative materials experience degradation over time, which can be envisaged by changes in the surface characteristics such as downturn in hardness. Thus, we aim to assess the effect of acidic drink on microhardness of zirconia-reinforced glass ionomer cement (GIC) and conventional GIC.

Materials and methods: Zirconia-reinforced GIC and conventional GIC were chosen for this present study. A total of 60 study pellets were prepared and divided into two groups. Group A consisted of 30 pellets of zirconia-reinforced GIC and group B consisted of 30 pellets of conventional GIC. Baseline readings of microhardness were taken by Vickers hardness testing machine. The samples of groups A and B were further divided into three subgroups. Subgroup 1: immersed in distilled water for 1 day (control). Subgroup 2: immersed in Coca-Cola for 1 day. Subgroup 3: immersed in Coca-Cola for 7 days. Surface hardness values were recorded after 1 day for subgroups 1 and 2 and after 7 days for subgroup 3.

Results: The surface microhardness of zirconia-reinforced GIC was significantly higher than conventional GIC when intergroup comparison was made. There was no statistically significant difference in microhardness of both conventional GIC and zirconia-reinforced GIC from baseline values after 1 day of immersion either in distilled water or Coca-Cola. Microhardness of both conventional GIC and zirconia-reinforced GIC showed a significant rise from baseline after immersion in Coca-Cola after 7 days.

Conclusion: Both the materials tested resisted acidic challenge; however, zirconia-reinforced GIC showed greater microhardness and can be considered as an alternative material of choice for conventional GIC.

How to cite this article: Kour T, Shahi P, Sogi S, et al. Comparative Evaluation of Surface Microhardness of Zirconia-reinforced Glass Ionomer Cement and Conventional Glass Ionomer Cement after Immersion in an Acidic Drink: An In Vitro Study. Int J Clin Pediatr Dent 2025;18(1):6-12.

氧化锆增强玻璃离子水泥浆与常规玻璃离子水泥浆在酸性饮料中浸泡后表面显微硬度的比较研究。
背景:显微硬度是牙科材料比较研究中最重要的物理特性之一。在酸性条件下,修复材料会随着时间的推移而降解,这可以通过表面特征的变化(如硬度下降)来预测。因此,我们旨在评估酸性饮料对氧化锆增强玻璃离子水泥(GIC)和常规GIC显微硬度的影响。材料和方法:本研究选择氧化锆增强GIC和常规GIC。共制备60粒研究微球,分为两组。A组为30粒氧化锆增强GIC, B组为30粒常规GIC。显微硬度基线读数由维氏硬度试验机采集。将A、B组样本进一步分为3个亚组。分组1:在蒸馏水中浸泡1天(对照组)。第二组:浸泡在可口可乐中1天。第三组:浸泡在可口可乐中7天。第1、2亚组1天后记录表面硬度值,第3亚组7天后记录表面硬度值。结果:组间比较,氧化锆增强GIC表面显微硬度明显高于常规GIC。在蒸馏水或可口可乐中浸泡1天后,常规GIC和氧化锆增强GIC的显微硬度与基线值无统计学差异。在可口可乐中浸泡7天后,常规GIC和氧化锆增强GIC的显微硬度均较基线显著升高。结论:两种材料均能抵抗酸性侵蚀;然而,氧化锆增强GIC表现出更高的显微硬度,可以被认为是传统GIC的替代材料选择。如何引用本文:Kour T, Shahi P, Sogi S等。氧化锆增强玻璃离子水泥浆与常规玻璃离子水泥浆在酸性饮料中浸泡后表面显微硬度的比较研究。中华临床儿科杂志,2015;18(1):6-12。
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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CiteScore
1.20
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135
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