Is it normal for a nine-year-old child not to change his teeth? It's normal for nine-year-olds not to change their teeth. Because people have to grow teeth twice in their life, that is, deciduous teeth and permanent teeth. There are 20 deciduous teeth, which usually start to erupt around 6 months, and grow together at the age of 2-3, and 28-32 permanent teeth (the number of wisdom teeth is 0-4), which generally start to grow around 6 years old, and 12- 13 years old (wisdom teeth vary from person to person) grow together with 28 teeth, so the tooth changing period is generally 6-62. There are certain rules for changing teeth. Simply put, it is a certain time, a certain order, according to? Left-right symmetry, first down and then up? The principle of left-right symmetry first down and then up is aimed at teeth with the same name.
Changing teeth is the process of deciduous teeth falling off and permanent teeth growing out. In the process of growth and development, there is a permanent tooth embryo under the root of each deciduous tooth, which gradually grows and develops. During the eruption of permanent teeth, on the one hand, the alveolar bone between the root of deciduous teeth and the embryo of permanent teeth is compressed, and the bone absorption becomes thinner through the action of osteoclasts until it is completely absorbed; On the other hand, the root of deciduous teeth is directly compressed, so that the root of deciduous teeth is gradually absorbed and becomes shorter and shorter until it disappears completely. So the deciduous teeth began to fall off and the permanent teeth gradually grew out.
If parents want their children's teeth to develop well, they should pay attention to diet, nutrition and oral hygiene at the stage of tooth development, strengthen exercise, get more exposure to the sun, and get in touch with the air and water in nature to enhance their physique. Infants and young children should not use tetracycline drugs. At the same time, we should also do a good job in the health care of infants, especially from birth to 1 year, which is prone to malnutrition and infectious diseases, and rickets, leading to tooth dysplasia.
What should children pay attention to when changing their teeth? 1. Go to the dentist regularly. Pay attention to the growth of children's deciduous teeth and permanent teeth, go to the dentist regularly, find problems and solve them as soon as possible. If parents find that there are permanent teeth growing next to the deciduous teeth, but the deciduous teeth have not fallen off, forming double rows of teeth, then parents should take their children to the hospital as soon as possible to remove the stranded deciduous teeth. In addition, if the gap between the maxillary incisors is too large, the upper incisors will grow deformed teeth and one incisor will grow in an abnormal position, which indicates that there may be multiple teeth in one place and it is necessary to go to the hospital for treatment.
2. Brush your teeth often. Urge children to brush their teeth every day, once in the morning and once in the evening to prevent dental caries. Children brush their teeth with toothpaste and toothbrush specially designed for children. Brushing your teeth correctly takes about two to three minutes. In addition to brushing teeth, it is best for children to rinse their mouths and maintain oral hygiene after eating food.
3, the diet should not be too fine. Children should eat more foods with high cellulose and certain hardness during tooth changing, such as beef, carrots, celery and corn. Maintain the stimulation of deciduous teeth and promote deciduous teeth to fall off on time. On the other hand, chewing can promote the development of gums, jaws and facial bones. At present, we eat too fine food and chew too little, which leads to insufficient jaw development. As a result, many children have insufficient space after their permanent teeth erupt, and their teeth are crowded and dislocated, which affects the beauty and function of their teeth. In addition, let children eat more hard food, less sugar food and less snacks.
Wonderful recommendation:
What should children do if they have a fever? Symptoms of chickenpox and treatment of upper respiratory tract infection? How can I grow taller teeth and yellow teeth? What are the causes of baby fever caused by the symptoms of baby fever? What cheese does the baby eat? How to make the baby indigestion eat Jianpi powder?