Rupp N W, Paffenbarger G C, Patel P R
J Am Dent Assoc. 1980 Jan;100(1):52-5. doi: 10.14219/jada.archive.1980.0025.
For most of the tested amalgams, the increased mercury content caused by delayed compaction increases the flow or creep. The amalgams that had high creep values when packed early were decidedly affected by the increase in mercury content caused by delay in compaction. Amalgams made with Dispersalloy, Tytin, Sybraloy, and New True Dentalloy are not as sensitive to the mercury content as are some of the others tested. Tests for creep may be related more to clinical practice if they are performed on specimens compacted three minutes after trituration rather than on specimens compacted immediately (a half minute) after trituration. In clinical practice, small amounts of amalgam should be mixed and used immediately after trituration. If the delay between trituration and compaction is longer than three minutes, additional mixes are required. We therefore conclude that, in making a large amalgam restoration, many small mixes have superior results over one large mix.
对于大多数测试的汞合金而言，延迟压实导致的汞含量增加会使流动性或蠕变增加。那些早期填充时蠕变值较高的汞合金，显然会受到压实延迟导致的汞含量增加的影响。用Dispersalloy、Tytin、Sybraloy和New True Dentalloy制成的汞合金对汞含量的敏感度不如所测试的其他一些汞合金。如果对研磨后三分钟压实的试样而不是对研磨后立即（半分钟）压实的试样进行蠕变测试，那么这些测试可能与临床实践的相关性更大。在临床实践中，少量汞合金应在研磨后立即混合并使用。如果研磨和压实之间的延迟超过三分钟，则需要额外混合。因此，我们得出结论，在制作大型汞合金修复体时，多次少量混合比一次大量混合效果更佳。
