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.
Fillings or dental fillings are used to repair the damaged surfaces of teeth. The surface of teeth may be damaged by small fractures, damaged enamel or decay. It takes 25 to 90 minutes to place a filling in a tooth. What different types of fillingsare there? Dental fillings are made of gold, silver, mercury or amalgam, porcelain or ceramic, plastic, composite resin materials or a glass and acrylic mixture called glass inomer.