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银汞合金(Amalgam)又称汞齐,是一种特殊类型的合金。它以汞为液体,银锡铜为合金粉,两者在一定比例下进行研磨成可塑状,以后硬化成合金,这样汞与合金的结合,称之汞齐化反应。银汞合金在1826年应用于临床。1896年G.V.Black氏首次介绍银汞合金的组成:银65％,锡29％,铜6％。至1970年银汞合金中铜的含量从6％上升至30％,这种高铜合金比传统式低铜合金具有一定的优越性,美国A、D、A N01规定了银汞合金标准,到1977年标准随之修改,允许银汞合金中铜含量可以增高。银汞合金适用于牙体缺损修复。据国外报道银汞合金作为补牙每年已超过1亿6千万只,我国制造银汞合金中银的用量每年达7吨左右,可见银汞合金在临床上应用之多。因为它具有操作方便,性能良好,以及价廉。但也存在某些不足之处。如果能了解它的性能,注意操作规范,可以成为良好的修复体。
Amalgam, also known as amalgam, is a special type of alloy. It is mercury for the liquid, silver tin copper alloy powder, both in a certain percentage of grinding into plastic form, later hardened into an alloy, so the combination of mercury and the alloy, called the amalgamation. Silver amalgam used in clinical in 1826. In 1896 G.V. Black's first introduction of silver amalgam composition: 65% silver, tin 29%, 6% copper. By 1970, the content of copper in amalgam rose from 6% to 30%. Such a high-copper alloy has some advantages over the traditional low-copper alloy. The United States A, D, and A01 stipulate the amalgam standard The 1977 standard has been revised to allow for increased copper content in silver-amalgam. Silver amalgam suitable for dental defect repair. According to foreign reports, amalgam as an annual supplement has more than 160 million, the amount of silver amalgam made in our country reaches about 7 tons per year, indicating that amalgam is used as much as clinically. Because it is easy to operate, good performance, and inexpensive. But there are some shortcomings. If you can understand its performance, pay attention to practices, can be a good restoration.