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5 Cards in this Set
- Front
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Amalgam
1. mix with mercury 2. is an alloy mixed with mercury to form a ______ mass which eventually hardens 3. they oftentimes last for 15 years or more |
Amalgam
1. mix with mercury 2. is an alloy mixed with mercury to form a plastic mass which eventually hardens 3. they oftentimes last for 15 years or more |
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Historical Aspects
1. _____ brothers 2. __ ___ _______ 3. _____ and _______ 4. Amalgam wars: anti-amalgam pledge, safety of mercury |
Historical Aspects
1. Crawcour brothers (1800s) 2. G. V. Black (1906) 3. Innes & Youdelist (1967) 4. Amalgam wars: anti-amalgam pledge, safety of mercury |
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Amalgam: What is it?
1. High _______ alloy -silver (55-70%), tin (25-27%), copper(9-30%), zinc(0.01%), trace metals 2. Mercury liquid -___ ____ technique 3. The amalgam alloy is triturated with liquid mercury. Before mixing, the percentage of mercury is as high as ____. After condensation and burnishing, the percentage of mercury is approximately ____. |
Amalgam: What is it?
1. High copper alloy -silver (55-70%), tin (25-27%), copper(9-30%), zinc(0.01%), trace metals 2. Mercury liquid -WA eames technique 3. The amalgam alloy is triturated with liquid mercury. Before mixing, the percentage of mercury is as high as 50%. After condensation and burnishing, the percentage of mercury is approximately 30%. |
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Amalgam: Setting reaction
1. __________ amalgam Silver-tin (gamma) + mercury (mercury) -> silver-tin (gamma) + silver-mercury (gamma-1) + tin-mercury (gamma-2) 2. ___ _______ amalgam silver-tin + copper+mercury-> silver-tin (_____) + silver-mercury (____ __) + copper-tin (___) Copper is more affinity to tin than mercury. This reduced the gamma-2 or tin-mercury product |
Amalgam: Setting reaction
1. conventional amalgam Silver-tin (gamma) + mercury (mercury) -> silver-tin (gamma) + silver-mercury (gamma-1) + tin-mercury (gamma-2) 2. high copper amalgam silver-tin + copper+mercury-> silver-tin (gamma) + silver-mercury (gamma-1) + copper-tin (eta) Copper is more affinity to tin than mercury. This reduced the gamma-2 or tin-mercury product |
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Amalgam Classification
1. _____ content (high or low) 2. _____ shape (____-__:machined, irregular shape, _____-_____, regular shapre, __-_____:dispersion phase - mixture of both) |
Amalgam Classification
1. copper content (high or low) 2. alloy shape (leathe-cut:machined, irregular shapre, spherical-atomized, regular shapre, ad-mixed:dispersion phase - mixture of both) |
