Briefly explained, low copper amalgams are also known as "traditional" or "conventional" and have been used for many decades (even at present) and contain less than 6 % copper, while high copper amalgams contain more than 6 % copper, in fact there are 2 main groups, one containing around 12-13 % copper, and the other containing up to 30 % copper. The additional copper helps to increase the formation of gamma 1 (silver-tin) and prevent the formation of a weak phase of dental amalgams, named gamma-2 (tin-Mercury) and thus the strength of the final product is higher. Therefore, the high copper amalgams have a higher compressive strength and in general, better mechanical properties, but there is one disadvantage, they release more mercury vapor, a poison for the brain, CNS and many other cells.
High copper amalgams are a new class of amalgams introduced by manufacturers starting about 1975-1976. The high copper amalgams are called such because they contain a new mixture of metals that include a significantly higher copper content than the previous generation of amalgam.
The 'high copper' amalgams reportedly have better strength, durability and clinical outcomes than previous low copper versions.
Some amalgam critics have alleged that high copper amalgams off gas mercury vapor at a much higher rate than the previous low copper versions, up to 50x faster.
Copper rich ores contain Relatively large amount of copper. Copper obtained from rich ores is from better quality than low-grade ores. A low-grade ore doesn't contain very high proportion of valuable copper
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They are between two atoms.These atoms have high electro negativity difference
Copper is great for conducting electricity, is malable, and has a high melting point.
Copper is low resiatance
Copper rich ores contain Relatively large amount of copper. Copper obtained from rich ores is from better quality than low-grade ores. A low-grade ore doesn't contain very high proportion of valuable copper
Basic Topical anesthetic Syringe Rubber dam High speed But block Slow speed 557 but (carbide bur) Dycal Amalgam Amalgam well Amalgamator Holenback Amalgam carier Ball burnisher Amalgam condenser 2 by 2 Cotton rolls Floss Ariculating paper Matrix Wedges
Copper rich ores contain Relatively large amount of copper. Copper obtained from rich ores is from better quality than low-grade ores. A low-grade ore doesn't contain very high proportion of valuable copper
there is no difference between high pressure and performance chromatography
there is no difference
difference between high tech positioning and high touch positioning?
ADSL is a way of using a pair of copper wires which is normally used for a phone line, to transfer high volumes of data. The copper wires were only originally designed to carry a phone call.Fibre optic cables are especially designed to transfer high volumes of data. They are made of glass, not copper wires.
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The difference between low percent error and high percent error is one is low and the other is high
Copper is just that pure copper. Beryllium copper also known as copper beryllium, beryllium bronze and spring copper, is a copper alloy with .5 to 3% beryllium and sometimes with other alloying elements. Beryllium copper combines high-strength with non-magnetic and non-sparking qualities. It has excellent metalworking, forming and machining qualities. It has many specialized applications in tools for hazardous environments, musical instruments, precision measuring devices, bullets, and aerospace.
The difference between e60m5 and e60550i is that e60m5 has a high speed than e60550i.
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