The body of a child and an adult has much similar, but also differences. It is known that in the beginning the children's teeth erupt temporary teeth, which after a while change to permanent. Despite their considerable identity, at first glance, it is possible to distinguish features in the structure. In addition, their deposition process is also significantly different from the mechanism of loss of permanent teeth.
Structure of infant teeth
Temporary teeth in children, as in adults, have a crown, neck and roots. However, even in anatomical structure, not to mention histology, you can find differences.
The dental crowns are smaller in height and width. Their fissures( grooves on the chewing surface of molars) are deeper, with pronounced tubercles of enamel. In particular, this explains the frequent defeat of fissure caries.
Temporal roots as compared with permanent, more branched, but have much thinner walls and shorter length. In them also pass the channels and connective tissue - the pulp.
The basic tissue of the tooth is represented by dentin. It is softer and prone to cathartic destruction. The same applies to enamel. The main structural unit is the enamel prism. Between them they are glued together by an amorphous substance. In milk teeth, enamel prisms are not so strong. The cariesogenic process, without proper oral hygiene, easily destroys them in a short period.
The process of changing teeth
There comes a time when the baby's body starts to work a little differently and there are certain changes in it. Loss of milk teeth without pathology is a physiological process that can not be avoided.
The future of The amount of both dairy and permanent teeth in a child is laid in the womb. In the newborn, they are represented in the form of follicles( rudiments).Normally, the child develops 20 follicles of the baby teeth and 32 permanent ones.
The change of bite usually begins with 5-6 years, but it can slightly outstrip such indicators or on the contrary linger. This is not considered a pathology. At present, the scheme of the loss of milk teeth is shifted in advance of physiological timing. The reasons for this, according to dentists, lie in the following:
- Features of the course of metabolic processes in modern children;
- Eating high-calorie food;
- Changes in the course of neuropsychic activity;
- Early damage to caries and its complications of hard tooth tissues;Periodontal disease at an early age;
- Injuries to the maxillofacial system;
- The lack of some trace elements in the growing body.
Of course, first of all, the occlusion is affected by the physiological processes in the child's body. Rapid growth of the rudiments of permanent teeth provokes resorption( dissolution) of the roots of temporary teeth. They begin to loosen up, under the influence of solid food, their dislocation and prolapse are observed.
By this time, from the roots, practically nothing remains. They almost completely dissolve under the influence of tissue fluid in the jaw. After the tooth fell out, in its place remains a minor wound, with slight bleeding. At home, to stop it, give the child a sterile gauze napkin and ask for a bite in the wound area. With heavy bleeding and severe pain, you should contact your dentist immediately.
The replacement process is quite long and lasts for several years. Only about 14-15 years the child has a complete permanent bite, but usually with the absence of third molars or wisdom teeth. They can erupt much later, in adulthood.
Sequence in the bite of the milk bite
In a vacant place, a permanent tooth may not appear immediately. If this does not happen within 2-3 years, then it is worthwhile to see a doctor and undergo an X-ray examination. Most likely, the rudiment of the tooth will be absent in the jaw. This is due to severe maternal illnesses during pregnancy and the baby in early life. In this situation, parents should take care of the state of bite, and turn to the orthodontist.
When the central incisors begin to change, permanent teeth are already present on the alveolar bone. This is 1 molar, it appears as early as 5 years. The central incisors are followed by the lateral ones, which fall at the age of 7-8 years. They have a slightly smaller size and grow quite fast. Further, the first molars are often loosened and the first molar teeth fall out. Their change is observed in 9-11 years. They are followed by second molars, they change at the age of 10-12 years. The fangs are the last. These teeth have a massive root. It differs from others, both in length and width. Therefore, his fallout is observed later all to 11-13 years of the child's life.