Polishability of Dental Amalgam as Influenced by Condensation Pressure and Primary Mercury Content
作者:
LeitãoJorge,
期刊:
Acta Odontologica Scandinavica
(Taylor Available online 1983)
卷期:
Volume 41,
issue 6
页码: 327-331
ISSN:0001-6357
年代: 1983
DOI:10.3109/00016358309162343
出版商: Taylor&Francis
关键词: Amalgam surface;porosity;roughness
数据来源: Taylor
摘要:
The polishability of some amalgam products was studied by determining the roughness (Rs) of metallographically polished specimens. The surface porosity of the specimens was also measured and was found to be closely correlated with the roughness. Two manipulative variables, condensation pressure and primary (precondensation) mercury content, were examined with respect to their effect on porosity and polishability. For the condensation pressures 14 and 20 MPa no differences could be observed in the effect on the surface properties studied. The primary mercury content was varied in three steps—the normal, recommended level and 5% more and less than this. For those products having a recommended precondensation mercury content of 50% or less, the 5% decrease in mercury resulted in a pronounced increase in porosity and Rs. The results indicate that polishability is for some products markedly improved by avoiding a dry mix.
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