How do our teeth grow? Detailed answer

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How do our teeth grow? Detailed answer

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How do our teeth grow?

Each tooth has two parts: the root or roots that attach the tooth to the jaw and the part that is visible in the mouth. There are four different substances in the tooth. The enamel covering the top of the tooth is a hard and shiny substance. Cement is a bone-like substance covering the root. Dentin is similar to ivory and is the body of the tooth.

The dental pulp is the hollow space inside the tooth, which is called the pulp cavity. The dental pulp is made up of tissue that contains nerves, arteries, and veins. They enter the tooth through a hole near the end of the root. Lack of dietary calcium or vitamin D leads to a weakening of the enamel, which causes the teeth to decay prematurely.

Tooth decay is exacerbated by the presence of food containing sugar or starch around the tooth, especially at night. When decomposed in the mouth, these substances produce acids that act on the calcium in the tooth and dissolve it, as a result of which the teeth soften and bacteria easily penetrate into them.

Why do teeth sometimes become crooked? In each case, the reasons may be different, but scientists believe that this problem may be caused by the way the jaws have developed in modern humans. Apparently, the jaws of modern man do not always provide enough space for his teeth. Therefore, they either appear in an already crooked position, or are shifted at the entrance of growth.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

What gesture did the ancient Romans order to kill a defeated gladiator?

The notion that ancient Roman spectators at the Colosseum chose life or death for the vanquished by pointing their thumbs up or down is erroneous. It arose after the appearance of the painting "Pollice Verso" by the artist Jean-Leon Gerome, who incorrectly translated the Latin text. In fact, a thumb bent in any direction (up or down) meant death for the vanquished, symbolizing a naked sword. And to bestow life, the audience showed a clenched fist, alluding to the sword hidden in the scabbard.

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Fear of heights is one of the most common phobias in the world. And now a group of European researchers have found a new way to treat it that doesn't require going to the doctor or going up to the roof.

The researchers used 100 volunteers for the experiments, all of whom were previously diagnosed with a fear of heights, but they did not receive any treatment for their problem. The researchers then divided the volunteers into two groups. 51 volunteers were sent to the control group, while 49 people were given the opportunity to undergo a two-week virtual reality treatment (47 people agreed to the offer and 44 completed it). The scientists published the results of the study in The Lancet Psychiatry.

During the program, volunteers used a virtual reality helmet along with a "virtual trainer" for six sessions, each lasting approximately 30 minutes. The automated trainer asked them questions about their fear of heights and told them facts about their phobia. He then took the subjects through a series of virtual scenarios to help people address their fear. In the scenarios, people were in different situations: for example, they could throw a ball over a roof parapet or save a cat from a tree. At the end of each session, the trainer asked people how they were feeling and encouraged them to face their fear in the real world between sessions.

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