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6.2 Amalgam. 6.3 Direct gold. ... a number of considerations will determine the type and extent of the preparation. ... 1; Moderate: 2; Enlarged: 3; Extensive: 4 ...
There are two ways in which wax can be used to produce cast metal/ceramic indirect restorations, these are known, firstly, as the indirect wax technique using Type 1 inlay wax and, secondly, the direct wax technique using Type 2 inlay wax. For technique 1, a wax pattern is designed on the die from the cast impressions and for technique 2 the ...
The amalgam expands ≈0.1% over 6–8 hours on setting. The final structure is a metal matrix composite , where γ 1 , η and γ 2 phases, are a matrix for unreacted original alloy, minus the fast-reacting β-phase and excess Sn.
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The metal may be in the granulated form or as shavings, wool, or powder. The amalgam forms on the surface of the zinc. After washing to remove salts, the amalgam is placed in a long glass tube, similar to a chromatography column, equipped with a stopcock. [1] The amalgam is a more effective reducing agent than zinc metal.
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No particular formula is assigned to "sodium amalgam". Na 5 Hg 8 and Na 3 Hg are well defined compounds. In sodium amalgams, the Hg-Hg distances are expanded to around 5 Å vs. about 3 Å for mercury itself. [3] Usually amalgams are classified on the weight percent of sodium. Amalgams with 2% Na are solids at room temperature, whereas some more ...