Brown I H, Miller D R
Department of Chemical Engineering (Materials), University of Adelaide, Australia.
Am J Dent. 1993 Oct;6(5):248-54.
Compressive strength, dimensional change during hardening and residual mercury content of three high-copper spherical particle amalgams (Tytin, Logic and Valiant), two admix amalgams (Dispersalloy and Permite C) and a conventional lathe-cut amalgam (New True Dentalloy) were determined as a function of condensation pressure and trituration time. The properties of the three amalgams containing non-spherical particles were markedly dependent on condensation pressure in the range 3 MPa to 14 MPa. Specimens condensed at 3 MPa showed substantially lower strength, greater expansion during hardening and higher residual mercury contents than did specimens condensed at 14 MPa. The three high-copper spherical particle amalgams, on the other hand, were comparatively insensitive to condensation pressure. Variations in trituration time between 5 and 12 seconds had little effect on the properties of any of the amalgams.
测定了三种高铜球形颗粒汞合金（Tytin、Logic和Valiant）、两种混合型汞合金（Dispersalloy和Permite C）以及一种传统车削型汞合金（New True Dentalloy）的抗压强度、硬化过程中的尺寸变化和残余汞含量，这些都是冷凝压力和研磨时间的函数。三种含非球形颗粒的汞合金的性能在3兆帕至14兆帕的冷凝压力范围内明显依赖于冷凝压力。在3兆帕下冷凝的试样比在14兆帕下冷凝的试样强度明显更低、硬化过程中膨胀更大且残余汞含量更高。另一方面，三种高铜球形颗粒汞合金对冷凝压力相对不敏感。研磨时间在5至12秒之间的变化对任何一种汞合金的性能影响很小。
