Permanent teeth

The first teeth of the baby begin to erupt with half a year. At the same time, parents will feel this on themselves. The first sign that the baby's teeth are pricked will be salivation. Kids begin to pull very hard into their mouths, everything that comes to hand. The child becomes whiny, irritable and restless, and certainly will not let you sleep at night.

The first molars will begin to be seen no earlier than 12 months. First, the upper ones appear, and by the 19 months the lower teeth will also appear. The whole process is very painful and painful for kids, so it is important to carefully and with understanding treat the child, give him calming herbal teas.

When the baby's teeth are chopped, gum massage can be very effective. For this, they must be cleaned with clean hands and gently massage the child, slightly pressing while doing so. This not only saves your child for some time from unpleasant sensations, but also allows the teeth to pass through the gum a little faster.

Root teeth will be replaced by permanent teeth when your child grows up, since they are not at all adapted to chewing hard and dense food, which in principle is not required for babies.

In adults, molars are called molars, they are located in the sixth, seventh and eighth positions of the permanent row. Teeth have a dense structure and a characteristic shape for the implementation of the masticatory function. They replace their predecessors by the age of five or six years, and are distinguished by strength and density.

It should be noted that the so-called "wisdom teeth" can appear at the age of 18 and even after 30 years - there is nothing wrong with that.

On the upper jaw, the molars have three canals, and on the lower jaw only two. However, there are exceptions, and sometimes dentists can observe an uncharacteristic arrangement of dental canals and roots.

Each molar has a specific chewing surface, which is represented by tubercles. They can be five and four, depending on the position of the tooth. Most often, only the first molar of the lower jaw can see five tubercles, and all the rest - four.

Between the teeth in the oral cavity there is an interdental space, the width of which can vary.

The structure of the teeth, in general, is similar. Each of them has enamel - this is a special fabric that covers the entire tooth from top to bottom. The tooth can also be divided into a crown, neck and root.

Root teeth do not fundamentally differ in structure from the rest, but their mass is much greater than the mass of canine teeth. Virtually all the space of the crown and root is occupied by dentin - it is a solid substance that looks like a sponge. Dentin nourishes the whole tooth, because In its tubules pass the nerve endings and small vessels.

In the middle of the tooth there is a cavity that reaches the root itself and ends with a small hole. For each individual tooth root in the jaw there is a special place - the cell into which it is placed. Between the root and the recess there is a small space filled with connective tissue, which allows the tooth to stay very tightly in the cell. From the tissue to the tooth penetrate its vessels and nerve endings - it supports the life of the organ.

All teeth in the oral cavity are arranged in the form of two arches, having the same structure. In this case, the chewing surfaces of the upper and lower arch should ideally match each other. The junction of these surfaces is called a bite.

As for the strength and strength of all teeth as a whole, in this case the hereditary factor and human nutrition play a big role. If the body lacks calcium, the teeth begin to crumble. There are a number of diseases that provoke tooth loss and fragility, but to a large extent everything depends on the person.