6. Gold alloy â gold-colored mixture of gold, copper and other metals, and is used mainly for crowns, fixed bridges and some partial denture framework. 1  Advantages â good resistance to further decay if fits well; excellent durability-does not fracture under stress; does not corrode in the mouth.or more than 150 years, dental fillings known as amalgams have been widely used to treat tooth decay. Amalgam fillings are made of a mixture of metals. The ingredients include equal parts of elemental mercury (43 to 54 percent), and an alloy powder (46 to 57 percent) mainly composed of silver, tin, copper.
limit order. Definition. An order to a broker to buy a specified quantity of a security at or below a specified price, or to sell it at or above a specified price (called the limit price). This ensures that a person will never pay more for the stock than whatever price is set as his/her limit.
Using Limit Orders. A limit order is used to buy stock at a price lower than the current share price or to sell stock at a higher price than the current value. Use a buy limit order to buy a stock you want to own but think the price will go lower in the near future and you want to pick up shares at the lower price. limit order can be filled at your limit price or better. This means on a buy limit order, the stock purchase price will be your limit price or lower; a sell limit order can be filled at the limit price or a higher price.