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银汞合金由于它优异的性能,一个多世纪来,还没有一种牙科充填材料能取而代之。但是,银汞充填技术如果掌握得不好,它的失败率还是相当高的。银汞充填失败的原因很多,充填物最终汞含量过高是失败的主要原因之一。根据实验,银汞充填物最终汞含量超过54％时;其强度就明显地降低。银汞合金在调研时,传统上都采用汞和银合金粉按重量以8:5的比例混合。用这种比例调研的银汞含汞量过高,必须在充填前及充填过程中不断地将多余的汞除去,使其最终汞含量降到53％以下。这种方法使用得当,可以达到较高的质量。但是除
Silver amalgam Because of its excellent properties, no dental filling material has been replaced for more than a century. However, the failure rate of amalgam filling technology is still very high if not well mastered. There are many reasons for the failure of amalgam filling, and one of the main reasons for the failure is that the final filling of mercury content is too high. According to the experiment, when the final mercury content of the amalgam fill exceeds 54%, its strength is obviously reduced. Silver amalgam research, traditionally used mercury and silver alloy powder by weight to 8: 5 ratio of mixing. Mercury amalgam found in this scale is too high for mercury to be continuously stripped of excess mercury before and during filling to reduce its final mercury content below 53%. This method is used properly, can achieve higher quality. But except