Objective:

The aim of this study was to investigate the surface microhardness and roughness properties of a modified glass ionomer cement formed by adding different ratios of Chitosan, when exposed to saliva and acid erosive gastric acid cycle environments.

Methods:

Chitosan was added to conventional glass ionomer liquid at volumes of 5% and 10%. The chitosan-modified glass ionomer was used for the experimental group, and traditional glass ionomer formed the control group. All the groups were separated into two subgroups. One of these subgroups was subjected to a gastric acid erosive cycle. The other subgroup was immersed in artificial saliva. Microhardness, surface roughness with optical profilometer and AFM measurements of all the samples were taken. Qualitative surface topographic evaluations were made using a SEM. The data were analyzed by Kruskal-Wallis and Mann Whitney U-test for pairwise comparisons of the groups at the 0.05 level of significance.

Results:

The addition of chitosan to GIC had a positive effect on the microhardness values. The gastric acid erosive cycle application negatively affected the microhardness and surface roughness properties of the sample groups.

Conclusion:

The chitosan-modified glass ionomer cement samples showed clinically acceptable surface roughness values. Although the results of the addition of the biopolymer, chitosan, to GIC are promising, there is a need for further in-vivo studies.

中文翻译：

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玻璃离子水门汀中添加壳聚糖对显微硬度和表面粗糙度的影响

客观的：

本研究的目的是研究通过添加不同比例的壳聚糖形成的改性玻璃离子水门汀在暴露于唾液和酸侵蚀胃酸循环环境时的表面显微硬度和粗糙度特性。

方法：

壳聚糖以 5% 和 10% 的体积添加到常规玻璃离聚物液体中。实验组采用壳聚糖改性玻璃离聚物，对照组为传统玻璃离聚物。所有组被分成两个亚组。这些亚组之一经历了胃酸侵蚀循环。另一个小组沉浸在人工唾液中。对所有样品进行显微硬度、表面粗糙度与光学轮廓仪和 AFM 测量。使用 SEM 进行定性表面形貌评估。通过 Kruskal-Wallis 和 Mann Whitney U检验分析数据，以在显着性水平为 0.05 时对各组进行成对比较。

结果：

向 GIC 添加壳聚糖对显微硬度值有积极影响。胃酸侵蚀循环应用对样品组的显微硬度和表面粗糙度性能产生负面影响。

结论：

壳聚糖改性玻璃离子水门汀样品显示出临床可接受的表面粗糙度值。尽管将生物聚合物壳聚糖添加到 GIC 中的结果是有希望的，但仍需要进一步的体内研究。