At what age does a child get permanent teeth?

Milk and molar teeth in children

Many people believe that there are no differences between permanent and temporary teeth, but this is not true. So, how to distinguish a baby tooth from a molar? At a minimum, their number differs (milk - 20, permanent, as a rule, 32). Temporary teeth have a light shade, while permanent teeth are naturally more yellow. Indigenous ones are also significantly larger in size than dairy ones - visually it is quite easy to distinguish them. Here are the most common questions asked by Internet users on this topic.

1. Do children have molars?
   Of course, there are, and at a certain point they begin to actively erupt.
2. How many molars do children have?
   From 28 to 32 (the maximum set appears after all eights appear).
3. Which molars appear first in a child?
   Typically, the lower central incisor erupts first.
4. At what age do children start to get their molars?
   Usually, dentition renewal begins after 6–7 years, but there are no strict limits.
5. Do children lose molars?
   By themselves - no, as a result of injuries and illnesses - yes.
6. What are the risks of removing a molar tooth in children?
   As corny as it may sound, his loss. And yes, a new one will not grow. Everything is like adults.
7. What to do if a child has yellow molars?
   Permanent teeth have a more yellowish tint than temporary teeth. Plaque on a child’s molars is normal, but hygiene should never be neglected.
8. What to do if a child has black molars?
   When teething, baby teeth may have a black color (the so-called Priestley plaque, or pigment bacteria). However, this does not happen with molars. If they are black, go to the dentist immediately.
9. What to do if a child does not have molar buds?
   This happens, but very rarely. Fortunately, with modern implantation and prosthetics technologies, the problem can be solved.
10. Is it normal for a child to have crooked molars?
    Contact an orthodontist immediately: correcting a bite in childhood is much easier and faster than in adults.
11. Which teeth do children replace with molars?
    All twenty, plus new molars appearing.

What does the dental formula look like?

The medical record, which the big one keeps in the dental clinic at his place of residence, contains notes about his dental condition. To avoid confusion, doctors number the teeth on each side of each jaw. So, the 1st and 2nd teeth are incisors, the 3rd are canines, the 4th and 5th are small molars (doctors call molars molars), the 6th and 7th are large molars. The 8th - the farthest one - is a “wisdom tooth”; a number of people do not have it, or they do, but not all. Each side of the jaw is also numbered: 1 - top right, 2 - top left, 3 - bottom left, 4 - bottom right. For example, entry 48 does not mean that you are a “Tarkatan” with a combat superset of teeth that does not exist. You simply do not have a “wisdom tooth” on the lower right. Entry 41 - a person lost one of the frontal incisors on the same side on the same jaw. You can write down the formula of the teeth more clearly: for example, “there is no 8th tooth from the bottom right.”

It often turns out that due to lack of space on the jaw, the wisdom tooth develops incorrectly - it can grow crooked, in which case its removal is indicated. For example, it may remain under the gum and, because of this, be affected by caries, which can subsequently develop into pulpitis or a dental cyst. Problematic “wisdom teeth” are quickly and decisively removed, and their absence will not greatly affect the quality of chewing food.

Molars in children: symptoms of eruption

• Fever. When teething in children, body temperature may rise, usually not higher than 38 degrees.
• Itching and pain at the site where the molar appears. Various gels and ointments, as well as gum massage, will help relieve children from unpleasant sensations.
• Increased salivation and runny nose.

Important!

The growth of molars in children, especially at the initial stage, leads to weakened immunity. Take vitamins and do not forget about preventive visits to the dentist.

Injuries

An accident or incident, such as a fight, can cause a tooth injury. And it doesn’t matter whether a small part has broken off, or the tooth has cracked, as they say, “to the point of bleeding” - the help of a doctor is definitely needed. In some cases, lost dental tissue is replenished. If a tooth is broken into pieces, it will most likely need to be completely removed and a prosthesis replaced every year. And the answer is simple - the dental tissues have not yet fully matured, the body is growing. And it is necessary to take full care of your teeth at such an early age. In case of extension, the operation is performed by introducing composite materials that replace enamel and dentin.

When does a child's molars come out?

Most parents are interested in the question: at what age do children’s molars begin to erupt? The first buds form in the fifth month of pregnancy. The exact timing of their appearance has not been determined and depends on the individual characteristics of the organism. Nevertheless, an approximate scheme for the eruption of molars in children exists. If the appearance of a permanent tooth is delayed for more than six months from the extreme threshold (especially after the loss of a baby tooth), consult a specialist. The doctor will take control of the process and be able to identify complications.

Second lower premolar

Average age of teething: 11-12 years

Average age of root formation: 13-14 years

Average length: 22.3 mm

The second lower premolar, which is very similar in crown shape to the first premolar, has a less complex root.

Its crown has a well-developed buccal cusp and a much better formed lingual cusp than on the first premolar. The access is made slightly oval, wider in the mesial-distal direction. They begin to form access in the central sulcus with a fissure bur with a cutting apex, and then expand and form the contour of the burr hole with spherical burs No. 4 and 6.

Researchers reported that only 12% of mandibular second premolars studied had a second or third canal [17]. Vertucci [13] also showed that second premolars had one apical foramen in 97.5%, while only 2.5% of the teeth examined had two foramina.

An important circumstance that should not be forgotten is the anatomical location of the mental foramen and the vessels and nerves passing through it. Due to the proximity of these structures, an acute inflammatory process in the area of ​​the lower premolars can cause temporary paresthesia. The exacerbation of the pathological process in this area is more severe and resistant to conservative treatment than in other areas.

Pattern of growth of molars in children

In most cases, the permanent tooth appears 3 to 5 months after the temporary tooth falls out. The order of eruption of molars is in many ways similar to the appearance of milk teeth. The first molars in children are the central lower incisors. The upper permanent teeth develop later than the lower ones, if we consider them in pairs.

Location and anatomical features of molars

Since man is an omnivore, for a healthy metabolism he needs different foods, including rough, animal, and plant foods. In order for the body to absorb it, you need to chew the food well, which is what molars do. Their chewing area reaches 1 cm2. Each such organ can withstand pressure of up to 70-75 kilograms. In total, there are up to 12 such units in the oral cavity of an adult. Six of them are located on the lower jaw, six on the upper jaw, three on each side.

The last elements in the series are the third molars. They are also called wisdom teeth. They cut through in adults, and often may not cut through at all. Their roots can have two, three or more branches. The size of the crowns of molar units can reach from 7 millimeters, in some organs up to nine. Their chewing surface is diamond-shaped with rounded corners. It has four tubercles, which are separated by 3 grooves located transversely. Classification of roots:

• palatal;
• buccal-distal;
• buccal-mesial;

The last type of roots is the largest. The palatine root belongs to the middle ones. The shortest in size is the buccal-distal. Each subsequent molar unit is endowed with smaller roots and a crown portion than the previous one. The first molar organs are large, their coronal surface is significant in area, and the size of the roots is the largest. The second units are already smaller in size. The extreme units do not have milk precursors. Their root length and crown size vary significantly. Usually, there are 3 tubercles on the crown, one of which is lingual and 2 buccal. As a rule, their roots are not too long, but they are often displaced and deviated to the side. Wise teeth can come into contact with 2 antagonists at the same time. This is considered normal.

On the upper jaw

The top row has its own characteristics and differences. Their main aspect is location. They form a straight line that is only slightly curved and diverges to the sides. The slope of the units increases from the first to the third segment. In addition, in the upper teeth:

1. Larger in size than the organs located in the lower jaw;
2. The root system is more powerful, it has three roots;
3. The tooth surface area is extensive;
4. Good ability to chop and chew food;
5. The outer side is covered with sharp tubercles with protruding forms, there are 3 or more of them;

The second molars of the upper row in the coronal part are similar to the first molar units, although they are more massive and rectangular. They are easier to dissect. The roots are usually grouped, sometimes merging with each other. The canals, which are parallel, often overlap each other when X-rays are taken. The roots are shorter compared to previous teeth. The three mouths often form a flat triangle, less often a straight line. The convex bottom of the chamber gives the mouths a funnel shape. It happens that the channels to the bottom of the chamber bend at a very acute angle.

Rarely do the upper posterior units have four roots. The first molar large organ of the upper jaw is equipped with more powerful roots than its lower antagonist. The peculiarity of the second molar teeth is that their crown can have any shape, while the lower ones can only have a certain shape. Properties of the shape of the upper units: cubic, regular, with a clear cross-shaped groove that divides the surface into four parts. The eights that are located on top are smaller in size than the bottom ones. In addition, they can develop from 1 to 4 or more roots.

On the lower jaw

Molars on the chewing side have tubercles, as well as fissures, that is, grooves. They can be shaped like cones, drops, or grooves. Reliefs are formed during the formation of organ rudiments. Since they grind food, there is a high risk of caries. To avoid such a pathology, it is necessary to seal the fissures. The procedure prevents food particles from getting into the grooves. In addition, sealants nourish the enamel layer with fluoride, helping it become healthier. To achieve maximum effectiveness, the session is carried out immediately when the units erupt, or within 12 months.

The molar organs of the lower row differ from the segments of the upper jaw. Their features:

• Such units have a different anatomical structure.
• They most often have 3 canals and 2 roots.
• They are smaller in size than their antagonists.
• The number of tubercles varies from three to six.
• The distal and medial roots are parallel.
• Root fusion is often diagnosed.
• The crown of the first unit has the shape of a cube, it is slightly elongated in the direction of the dentition.
• The most posterior wise crowns are always large in size, they are larger than the upper ones.
• As a rule, they have two roots that can grow together into one.
• The fissure tubercles are lower, blunt, and have a rounded shape.

The bottom row is located almost in a straight line. The crowns are inclined in the opposite direction than on the upper segment. Because of this, when the jaw bones are closed, the upper row is superimposed on the units of the lower jaw with a slight shift outward. The crowns of the 2nd molar tooth are slightly smaller than the coronal part of the first unit. The approximal surfaces are located almost parallel. They taper slightly at the neck. The vestibular surface is divided into 2 parts by a rather deep notch.

Complications during teething

• Delay in the appearance of permanent teeth.
  This may be due to genetic characteristics, immune system problems and a number of other diseases.
• Uneven teeth and other malocclusions.
• Hyperdentia.
  The child’s molar tooth (or teeth) grows in the second row. Hyperdentia, or supernumerary of teeth, is a fairly rare phenomenon, but requires the intervention of a dentist to eliminate the risk of malocclusion in a child.

Is there always a change?

Not a single child's tooth should be preserved - they all fall out. Instead of each temporary one, a permanent one is cut through. But it also occurs in dental practice that the rudiment of the root unit is missing. This can be seen in the X-ray of the jaws.

In this case, the life of the baby tooth is extended to the maximum - after all, nothing will grow in its place. When an empty space appears in the dentition, the issue of prosthetics is discussed.

To eliminate partial congenital edentia, you can implant an implant or install a dental bridge. In the first case, there is no need to file adjacent teeth. The doctor, under local anesthesia, installs an artificial titanium root into the jaw tissue. When it takes root, it fixes the dental crown.

In the case of a bridge, it is necessary to depulpate and prepare the neighbors . This is not very healthy, since their service life after such manipulations is significantly reduced. Therefore, young patients who do not have separate molars are recommended by dentists to resort to implantation.

Common problems with molars in children

Anatomy of permanent teeth

The molar tooth includes three zones: the root, which sits deep in the jaw socket and holds the tooth in place, the neck, located in the periodontal area, and the crown, which extends directly into the oral cavity. After the apex of the tooth appears, a protective film forms on the enamel, the strongest layer of the tooth, which is soon replaced by a salivary layer, formed from the saliva itself. The dental tissues themselves are not just a piece of bone, but a certain heterogeneity, which includes, in addition to enamel, dentin (the main substance of the tooth) and the dental cavity, in which nerves and blood vessels branch. Compared to bones, for example, the phalanges of the fingers, dentin is noticeably stronger - it contains an increased amount of minerals, for example, the same calcium-based compounds. The root zone of dentin is connected to the periodontium using a special layer - dental cement, which communicates with the tissues of the periodontium itself and supplies the dentin with nutrients.

Care instructions

Molars in children require even more careful care than in adults. Frail enamel is much more susceptible to the effects of carious bacteria and the external environment, and the love of sweets and carbonated drinks does not add strength to it. When children develop a permanent bite, parents need to take special control of oral hygiene and diet (at least until the age of 14–15, when the teenager himself begins to realize the importance of dental health). In general, there are no difficulties here: in order to keep children's teeth strong and healthy, you need to follow several basic points.

• Daily hygiene.
  Brush your teeth at least twice a day, use dental floss and special rinses.
• Proper diet.
  Limit your intake of sweets and carbohydrates.
• Preventative visits to the dentist at least once every six months.
  If necessary, fluoridation and sealing of molars in children (so-called fissure sealing).
• Do not forget to wear a protective mouth guard during active games and sports.