What are our teeth made of?
Your pearly teeth are made from calcium and other chemicals found in milk and wholesome cheese, in nourishing meat and eggs, from vitamin chemicals found in green and yellow vegetables and from different minerals found in water and a wide assortment of foods. A person grows two sets of teeth during a lifetime. The first tooth cutting begins when a baby is about six months old, and at the age of two and a half the young person has a full set of 20 milk teeth. Then the body begins to absorb or dissolve and take back some of the materials used to make these first rather soft teeth. Most of the roots disappear and the teeth fall out one by one. The second set of teeth begins to Erupt through the gums when a young person is about six years old. The second set is the permanent teeth that should be durable enough to last a person all through his or her lifetime. The quality of these teeth depends upon the ingredients from which they are built. And these ingredients, of course, are extracted f
An up to date dentist can ,.fill a cavity or even extract a tooth without hurting you. But you would rather keep your teeth healthy and free of cavities. You can help make this possible by learning about your teeth and by following a few rules. Then the dentist will give them an expert cleaning, which is no strain on you at all. Your teeth should look like a double row of milky white pearls, hard and spanking clean. When you look in a mirror and open your mouth, you see just the coating of only part of your teeth. When you run your finger over their tops, you are touching the hardest material in your body. It is tooth enamel, much harder than bones, and it forms a jacket over the crown or top part of each healthy tooth. The enamel. covered crown is above the gum where you can see it. every tooth has roots that reach right down into the jaw bone, and the biggest part of a tooth is buried out of sight. In a healthy tooth the material under the enamel of the crown also is out of sight. Th
Do you brush your teeth at least twice a day? If you do, and you brush hard, have you ever wondered why you dont wear your teeth down? The fact is that our teeth are pretty tough about as hard as rocks. Every tooth is made up of the same two parts: a root, or roots, to anchor it in the jaw bone, and a crown, the part that can be seen in the mouth. Teeth are composed mostly of mineral salts, of which calcium and phosphorus are the most prominent. The enamel is hard and shiny, and covers the crown. The cementum is a bonelike material that covers the root. The dentine is an ivorylike material that forms the bulk or body of the tooth. And the dental pulp is in a hollow space called the pulp chamber inside the tooth.
