Sources: American Heart Association. Heart Disease and Stroke Statistics - 2009 Update; CDC, Heart Disease and Stroke Prevention Addressing the Nation's Leading Killers, At A Glance, 2011. Heart disease and stroke are the first and fourth leading causes of death in the United States.
Your teeth are composed of four dental tissues. Three of themâenamel, dentin and cementumâare hard tissues. The fourth tissueâpulp, or the center of the tooth that contains nerves, blood vessels and connective tissueâis a soft, or non-calcified, tissue.
You have a variety of teeth in your mouth, all serving different functions. Each tooth, however, is comprised of the same tissues and fibers to keep it in place and working properly. Your teeth are held in place by your gums, the soft pink tissue you see around your teeth when you smile. The part of the tooth that you can see emerging from your gums is known as the crown.