Blair F M, Whitworth J M, McCabe J F
Dental School, University of Newcastle Upon Tyne, England.
Dent Mater. 1995 Jul;11(4):277-80. doi: 10.1016/0109-5641(95)80063-8.
This study was conducted to compare the physical properties of a gallium alloy restorative material and a widely used mercury-containing dental amalgam.
Although the specimens were not prepared according to ISO specifications, specimens of both materials were subjected to ISO standard (ISO 1559; 1986) tests. The results were analyzed by ANOVA, Mann-Whitney U test and Student's t-test.
The gallium alloy showed setting expansion which was greater than that for the other amalgam and greater than the upper limit set by the ISO standard. For other properties, gallium alloy performed as well as, and in the case of creep, was superior to that of the amalgam.
The gallium alloy proved difficult to manipulate even when using the PTFE coated instruments recommended by the manufacturer. It is suggested that while the material may prove to be a viable alternative to conventional dental amalgam, a considerable improvement in its handling characteristics would be required before it would gain widespread acceptance for clinical use.
本研究旨在比较一种镓合金修复材料与一种广泛使用的含汞牙科汞合金的物理性能。
尽管样本并非按照ISO规范制备，但两种材料的样本均接受了ISO标准（ISO 1559；1986）测试。结果通过方差分析、曼-惠特尼U检验和学生t检验进行分析。
镓合金表现出的凝固膨胀大于另一种汞合金，且大于ISO标准设定的上限。对于其他性能，镓合金表现与汞合金相当，在蠕变方面优于汞合金。
即使使用制造商推荐的涂有聚四氟乙烯的器械，镓合金仍难以操作。建议尽管该材料可能被证明是传统牙科汞合金的可行替代品，但在其获得临床广泛应用之前，需要对其操作特性进行相当大的改进。
