Aging characteristics of four hybrid glass ionomers

Proceedings of the 1995 Fourteenth Southern Biomedical Engineering Conference Pub Date : 1995-04-07 DOI:10.1109/SBEC.1995.514439

B. Bennett, A. Puckett, J. Fitchie

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Abstract

Summary form only given. The objective of this study was to evaluate the change in Barcol hardness of five different hybrid glass ionomers (GI) after storage in distilled H/sub 2/O at 37/spl deg/C. The materials were (A) Encapsulated and (B) Handmixed Variglass (Caulk Dentsply, Milford, DE), (C) Vitremer (3M, St. Paul, MN), (D) Fuji II (GC Corp., Tokyo, Japan) and (E) Photacfil (ESPE Premier, Norristown, PA). Barcol hardness measurements were taken on all the samples after twenty-four hours, 1 week and 1 month of aging. Comparison of the initial hardness using ANOVA (p<0.05) revealed no significant differences. However, materials A and B showed a decrease in hardness after 1 week of storage. In contrast, materials C, D and E showed a significant increase (p<0.05) in hardness after storage. Based upon these results, it may be concluded that materials C, D and E continue to react during aging resulting in a harder material. In contrast, the materials A and B do not continue to react but actually become softer due to plasticization by absorbed water. The additional reaction of materials C, D and E is most probably the result of further ionic crosslinking which may be facilitated by water absorption.

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四种杂化玻璃离子的老化特性

只提供摘要形式。本研究的目的是评价5种不同的杂化玻璃离子(GI)在37℃/spl℃的蒸馏H/sub /O中保存后的硬度变化。材料为(A)封装和(B)手工混合varigglass (Caulk Dentsply, Milford, DE)， (C) Vitremer (3M, St. Paul, MN)， (D) Fuji II (GC Corp, Tokyo, Japan)和(E) Photacfil (ESPE Premier, Norristown, PA)。分别在时效24小时、1周和1个月后对样品进行巴氏硬度测定。采用方差分析比较初始硬度(p<0.05)，差异无统计学意义。然而，材料A和材料B在储存1周后硬度下降。C、D、E材料贮藏后硬度显著升高(p<0.05)。根据这些结果，可以得出结论，材料C、D和E在时效过程中继续发生反应，导致材料变硬。相反，材料A和材料B不会继续反应，而是由于吸收的水的塑化而变得更软。材料C、D和E的附加反应很可能是进一步离子交联的结果，而离子交联可以通过吸水来促进。

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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Proceedings of the 1995 Fourteenth Southern Biomedical Engineering Conference

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