The enamel on our teeth is the hardest substance in the human body. The enamel once fully formed does not get replaced.
It is the hard layer covering the surface of the tooth. Teeth are protected from decay by the enamel, which wears away with age. Teeth enamel is composed primarily of calcium phosphate, a compound that is a form of hydroxyapatite. In addition to calcium phosphate, tooth enamel also contains about 5% water by weight.
As a result of acid erosion from foods and beverages such as coffee, soft drinks, and fruit juices, the enamel on teeth can erode.
A layer of enamel protects the dentine, which is a softer and more sensitive substance. Dentine is designed in such a way that it is capable of withstanding chewing forces and protecting the pulp, which contains nerves and blood vessels.
It is said that the first toothbrushes were made of bones, sticks, and hog bristles. These early brushes were not known for lasting long as they wore out very quickly.
Before the invention of toothbrushes people used to use what was called “chew sticks” These chew sticks were made from a stick that was chewed at one end to make a brush like end.
In ancient times, toothpaste was not as sophisticated as it is today. In ancient times, toothpaste was made up of ash, chalk, salt, vinegar, and salt. In order to clean the teeth, the mixture was applied to them and then they were brushed with a brush or cloth.
Before modern toothpaste was invented people used to use all kinds of gross substances as toothpaste. Some of the weirdest and grossest were:
- Lizard liver
- Dried flowers