As we all know, teeth grow twice in a person's life, namely deciduous teeth and permanent teeth. There are 20 deciduous teeth, which usually begin to erupt in about 6 months, and the deciduous teeth grow at the age of 2-3; there are 28-32 permanent teeth, of which the number of wisdom teeth is 0-4.
When should deciduous teeth be replaced with permanent teeth?
1, at the age of 6-8, the first permanent tooth, namely the middle incisor , and the first molar also grows slowly;
2, at the age of 8-9, the lateral incisor ; 10- At the age of 12, bicuspids begin to grow, and the first bicuspid will grow first, next to the lateral teeth;
3, 11-12 years old, the upper and lower canines gradually grow;
4, 12-13 years old, long The second molars; the last third molars, the wisdom teeth, don't start to erupt until after age 17 and stay there until age 21 (varies from person to person).
Several common problems during tooth replacement period:
1. The deciduous teeth have not been loosened, but the permanent teeth have grown. What should I do?
This situation is generally called " deciduous tooth retention ".
The direction of the eruption of the permanent teeth is abnormal, or the eruption is not strong enough, so that the roots of the deciduous teeth are not compressed by the eruption of the permanent teeth and are not absorbed or are retained due to incomplete absorption. The consequence of this situation is the appearance of "double rows of teeth". What about
?
The baby should be taken to the dentist as soon as possible, usually to extract the baby teeth.
2. The newly grown teeth are crooked, what should I do?
This condition is medically known as "temporary misalignment".
During the period of tooth replacement, in addition to tooth replacement, the jaws are also developing, and the occlusal relationship is gradually established. During the alternation of primary and permanent teeth, the arrangement of the teeth is often not so good-looking, and there will be a skewed situation. What about
?
Teeth will adjust themselves during development and make the misalignment return to normal. If the subsequent teeth still cannot be adjusted by themselves, professional dental "orthodontic treatment" can also be performed.
3. What should I do if the deciduous teeth fall out in advance?
If a deciduous tooth is lost prematurely, the adjacent tooth will slowly tilt or move slowly into the missing tooth. At the same time, the teeth of the opposite jaw will move up or down towards the gap of the missing teeth.
When the adjacent teeth are displaced into the gap, there is not enough space for the eruption of the secondary permanent teeth buried under the jawbone. If the space management is not carried out in time, the permanent teeth will be crowded or even malocclusion. What about
?
Parents should regularly take their children to a professional dental hospital for inspection, and take pictures to determine the development of permanent tooth germs. Once deciduous teeth are prematurely lost , timely intervention and treatment are required, and " gap maintainer " is installed. Orthodontic treatment is also required if the permanent teeth are deformed.
Best time for orthodontic correction:
Deciduous teeth period (3~6 years old)
It can promote the front and back jaw, mandibular protrusion, posterior crossbite of the maxillofacial area of children, etc., which hinder the normal facial hair and normal function of the oral cavity bad habit.
Dental replacement period (6~12 years old)
If there is anterior crossbite, functional retraction of the mandible and abnormal relationship between the upper and lower jaws during this period, it needs to be corrected in time.
Permanent dentition period (about 12 years old)
This period is the best period for the treatment of irregular dentition, and the curative effect is the best. All kinds of irregular dentition can be corrected. In addition, if there is abnormal skeletal development, such as " squatting ", " buck teeth ", etc., also need immediate treatment.
