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.
New research reveals that dental caries, also known as cavities or tooth decay, is actually an infectious disease. Dental caries cause the demineralization and break down of the enamel, dentin and cementum within teeth.