Summer in Japan is the season of fireworks! Highlights of the fireworks shows throughout Japan. Ten fireworks shows that have distinguishing features such as a long history, a high level of craftsmanship, or being highly entertaining have been selected from representative fireworks shows throughout Japan and are introduced here.
Most people recognize dental amalgams as silver fillings. Dental amalgam is a mixture of mercury, silver, tin and copper. Mercury, which makes up about 50 percent of the compound, is necessary to bind the metals together to provide a strong, hard, durable filling.
Dentists use amalgam (silver) tooth fillings because they're strong and they last a long time -- typically at least seven years, and usually longer. They also are the least expensive type of fillings. Dental amalgam is a mixture of metals; the fillings are known as silver fillings because of their silver color.Dentists often use them for fillings in the back teeth.entists may use amalgam or silver fillings to fix cavities in teeth. Amalgam fillings are strong and durable. They are generally more economical than tooth-colored fillings.