Why do our teeth decay? Detailed answer

BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

Why do our teeth decay? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

Did you know?

Why do our teeth decay?

In protozoa, teeth are replaced throughout life. As soon as the teeth wear out and fall out, others immediately grow in their place. A person has only one replacement of teeth. Children by the age of two have only 20 teeth, called milk teeth. Under the milk teeth are the second teeth, which begin to erupt by the age of six. These milk teeth are replaced by the age of 12.

An adult should have a full set of teeth - 32 molars. After that, we can no longer grow new teeth, so the teeth must be monitored to avoid their destruction. Usually the enamel starts to break down. You can see how defects appear on the enamel. It may just be a small hole. But the bacteria that are always present in our mouths soon break down the surface of the enamel and settle underneath. Bacteria do not eat enamel, but they can feed on dentin and lymph, which is located in the channels of the dentin. Subsequently, bacteria corrode the walls of the channels, and a crack forms in the enamel. It may not be noticeable for some time.

But if the bacteria undermine the tooth so much that the walls are too thin, we will find out about this very quickly. This will happen due to the fact that hot or cold will be able to penetrate through the hole into the pulp. The pulp occupies the free space in the center of the tooth and contains the nerves. These nerves are excited by exposure to cold or hot.

When the teeth become sensitive to cold or hot, this means that decay has taken place. When bacteria enter the pulp through the tubules of the dentin, they find an abundance of food and breeding ground there. So we experience a toothache that causes a lot of inconvenience, it is impossible to eat anything, there is no strength to endure. The shell of the tooth begins to die. Moral - go to the dentist more often!

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

How do fish sniff?

It will probably surprise many that fish can sniff things. But like all other organisms, fish sniff with their noses. Fish have two pairs of nostrils. Each nostril has two openings. One in front, the other just behind him. The location of the nostrils on the head can be completely different, depending on the type of fish. The flow of water passes through all the holes. It flows into the front and out through the back. At the same time, water irritates sensitive cells that tell the fish about the smell.

Many fish have a keen sense of smell. They can detect even a faint trace of a substance. Indeed, the sense of touch can be very important for fish when they find their way home. You know that sturgeons return to their original spawning habitats.

How do they do it? Scientists believe that they show their children the way by smell. The researchers trained the sturgeon to distinguish between 14 different types of odors. Some fish can tell the difference between water from two bodies of water. But if their noses are plugged, they cannot do it.

For other experiments, a large group of sturgeon was taken from their native waters. One half got their noses plugged, the other half didn't. Those whose noses didn't work got lost. The second found their way to their pond.

Test your knowledge! Did you know...

▪ How are fossils formed?

▪ Are the further adventures of Robinson Crusoe described?

▪ When did shoe stores use x-rays?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

Monitor Samsung C27RG5 11.06.2019

Samsung Electronics has announced the launch of the 27-inch C27RG5 monitor, which is the latest addition to Samsung's line of curved gaming monitors. The novelty supports G-Sync technology and a refresh rate of 240 Hz.

Screen resolution C27RG5 - 1920 x 1080 pixels, VA panel curvature radius - 1500R, static contrast ratio - 3000:1, maximum brightness - 300 cd/m2. The screen is characterized by viewing angles of 178° and a response time of 4 ms. Given the scope of the monitor, it has modes optimized for different gaming genres.

The monitor is equipped with one DisplayPort 1.2 input, two HDMI 2.0 inputs and a headphone output. The stand provides tilt angle adjustment from -2° to 15°.

The price of new items is $400.

Other interesting news:

▪ First PowerVR Series6 GPUs from Imagination Technologies

▪ artificial black soil

▪ James Webb telescope launched into orbit

▪ New OMRON Sensor Detects Tilt Direction

▪ Sensory Compensation Mechanism

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Big encyclopedia for children and adults. Selection of articles

▪ article Blood insult. Popular expression

▪ article What ended the duel between two Englishmen, one of whom appeared naked? Detailed answer

▪ article Ancient Russian units of measurement. Tourist tips

▪ article Thermostat for a water tank. Encyclopedia of radio electronics and electrical engineering

▪ article Grounding and electrical safety protective measures. Grounding devices in areas with high earth resistivity. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews