State Route 520 Bridge: Also known as the Evergreen Point Bridge, it is the longest floating span in the world. It also produced some of Seattle area's longest traffic jams until the state began tolling the bridge again for the first time in 30 years last December.
Tooth decay is damage that occurs when germs (bacteria) in your mouth make acids that eat away at a tooth. It can lead to a hole in the tooth, called a cavity. If not treated, tooth decay can cause pain, infection, and tooth loss. A tooth has three layers. The hard outer layer is called enamel.
For caries of bone, see Osteolysis. Tooth decay, also known as dental caries, cavities, or caries, is a breakdown of teeth due to activities of bacteria. The cavities may be a number of different colors from yellow to black. Symptoms may include pain and difficulty with eating. Complications may include inflammation of the tissue around the tooth, tooth loss, and infection or abscess formation. The cause of caries is bacterial breakdown of the hard tissues of the teeth (enamel, dentin and cementum). This occurs due to acid made from food debris or sugar on the tooth surface.