1. Common knowledge about tooth replacement
Common knowledge about tooth replacement 1. Why do people need to change teeth
When people come into this world, they have no teeth, and then they slowly grow. The emergence of deciduous teeth changes as a person grows up and eats food.
The next ones are the permanent teeth, which are the second set of teeth after the deciduous teeth fall out. They will no longer erupt after the deciduous teeth fall out. There are 32 permanent teeth in the mouth, 16 on each side.
Around the age of six, the first permanent molar erupts, which is the beginning of the mixed dentition period. Around the age of 12, all deciduous teeth are replaced by permanent teeth, and the mixed dentition period ends.
There are only 20 deciduous teeth in the deciduous dentition, so among the 32 teeth in the permanent dentition, 20 permanent teeth are secondary teeth to replace the deciduous teeth. The remaining 12 are all large molars, which only erupt once in a lifetime. Among them, the first molar is also called the "sixth age teeth" because most of them erupt at the age of six.
The third molars tend to degenerate. Some people have impacted or congenitally missing teeth. The number of permanent teeth can be between 28 and 32.
2. Tell us more about the common sense of children’s teeth changing period
Usually, at the age of 6 to 7, the deciduous central incisors (central incisors) of the mandible begin to shake and fall out. Soon , where the permanent central incisors grow; at the same time, the first molars grow behind the second deciduous molars. After that, other teeth were replaced one after another. The single and bicuspid teeth of the permanent teeth can only grow in after the deciduous teeth in the same position are lost. Until the age of 12 to 13, all deciduous teeth fall out and are replaced by permanent teeth. Later, single permanent teeth emerge: the second molar appears behind the first molar between the ages of 12 and 14, and the third molar appears after the age of 18. It is normal for some people to not have third molars.
Issues that should be paid attention to during the tooth replacement period
Retained deciduous teeth: The deciduous teeth do not fall out when they should. Doctors call this phenomenon retained deciduous teeth. Children should be taken to the hospital for examination and treatment in time.
Main reasons: Dislocation of permanent tooth germ, local inflammation, and loss of permanent tooth germ
Retained teeth that have erupted but have not fallen out as deciduous teeth should be extracted as soon as possible to avoid affecting the normal function of permanent teeth. Emerge in position. For those who have passed the tooth eruption age but have not lost their deciduous teeth and the permanent teeth have not erupted, do not pull them out easily. If the permanent teeth are congenitally missing, try to keep the deciduous teeth.
Premature loss of deciduous teeth: The deciduous teeth fall out before they should fall out, which is called premature loss of deciduous teeth. It often causes the adjacent teeth on both sides to tilt toward the missing tooth space, making the gap between the missing teeth smaller, and the permanent teeth erupt in a misplaced position due to insufficient space. A gap maintainer should be worn in the gap between the deciduous teeth to prevent the teeth on both sides from tilting until the permanent teeth erupt.
Difficulty in the eruption of permanent teeth: The eruption force of permanent teeth is generated during the development of the tooth roots, causing the permanent teeth to move toward the gums and gradually erupt. This requires a process, especially for the upper front teeth. Permanent teeth that have not erupted beyond the replacement period are called delayed eruption of permanent teeth.
Main reasons: premature loss of deciduous teeth, supernumerary odontoma or cyst, obstruction of permanent tooth development, abnormal genetic factors
Teeth misalignment: tooth replacement during the tooth replacement period, jaw development, and gradual establishment Occlusion relationships, sometimes temporary misalignment, tend to adjust themselves back to normal during tooth development. Some misaligned bites cannot be adjusted by themselves, which will affect facial development and should go to the hospital for diagnosis and treatment.
Double-layered teeth: Before the deciduous teeth fall out, the permanent teeth are drilled out, causing the teeth to be arranged in two rows, front and back. This is not uncommon. This is probably caused by the roots of the deciduous teeth not being fully resorbed. Oral X-rays can determine the relative positions of deciduous teeth and permanent teeth to diagnose whether deciduous teeth will fall out on their own or need to be extracted.
It hurts a little when changing teeth: The process of tooth loosening and falling out is generally not painful, but as the deciduous teeth begin to fall out, the "sixth-year-old teeth" also grow in, which may cause swelling of the gums and make the child complain of toothache. If the pain is severe, you need to see a dentist to see if anti-inflammation and analgesia are needed.
Sixth-year-old tooth decay: Around the age of 6, the first permanent molar quietly grows behind the second deciduous molar, also called "sixth-year-old tooth". It does not replace any deciduous teeth and can easily be mistaken for deciduous teeth. Clinically, it has been found that many children in their sixth year have dental caries, and severe cases have developed into pulpitis or periapical inflammation. In order to prevent dental caries in the sixth year of life, pit and fissure sealing should be performed as early as possible.
Nutrition and diet for babies whose teeth are changing
As they age, children should eat more chewy foods such as jellyfish, peanuts, sugar cane, and spiced beans to maintain good health for their deciduous teeth. * Function to promote deciduous teeth to fall out on time. When the child reaches about 10 years old, the front incisors and back molars have erupted. Parents can add some celery stalks, corn, apples and other foods to them to complete the tooth replacement smoothly and let the children have healthy and straight permanent teeth.
Prevent inferiority complex during the teething period
During the teething period, children's self-esteem has been established, and they care about whether the front teeth look good or not, but they don't say it in their mouths. If you tease them like this, the child will develop an inferiority complex and even lick his teeth desperately in the hope that they will grow back quickly, but the result is counterproductive. You can tell your children that white swans are all transformed from ugly ducklings. Losing the front teeth and becoming ugly is a process of transformation, which proves that "you are about to grow up", and every child must go through this process when growing up.
3. What are the precautions before and after tooth replacement?
Children usually start to change teeth when they are around 6 years old, and it takes until 12 to 13 years old for all teeth to be replaced.
The shape of the replaced permanent teeth is basically similar to the original deciduous teeth, but they are larger than the deciduous teeth, yellower in color and more shiny. Care during the tooth replacement period Physiological care Pay attention to whether the deciduous teeth are retained or lost prematurely.
There is a certain time and order for the deciduous teeth to fall out. If the deciduous teeth should fall out but not fall out, it is called retained deciduous teeth. The consequence is often that the permanent teeth cannot erupt in their normal position. The most common is that the lower front permanent teeth erupt on the inside of the deciduous teeth, and the upper front permanent teeth erupt on the outside of the deciduous teeth, which looks like a double layer of teeth.
When encountering this situation, you should take your child to the hospital as soon as possible to remove the retained deciduous teeth to make room for the permanent teeth to erupt. If the deciduous teeth fall out before they should fall out, it is called premature loss of deciduous teeth. This often causes the adjacent teeth on both sides to tilt toward the missing tooth space, making the gap between the missing teeth smaller, and the permanent teeth erupt in a misplaced position due to insufficient space.
At this time, a gap maintainer (customized by the dental department of the hospital) should be placed in the gap of the deciduous teeth to prevent the teeth on both sides from tilting and maintain the eruption position of the permanent teeth until the permanent teeth erupt. Pay attention to whether there are any difficulties with the eruption of permanent teeth.
When deciduous teeth fall out prematurely, children become accustomed to chewing and licking with their gums. The gums will become thick and tough, hindering the eruption of permanent teeth. Therefore, if your child has reached the age of teeth replacement but the permanent teeth have not yet erupted, you should take your child to the hospital for a timely check-up to get help from a doctor.
Calcium deficiency in children is also an important reason for the delayed eruption of permanent teeth. Parents should provide calcium supplements to their children in time. Pay attention to the cleanliness and hygiene of your child's mouth.
During the tooth replacement period, deciduous teeth and permanent teeth are still present, and the permanent teeth have just erupted, especially the "sixth-year-old teeth" which are the "key to bite". It is large in size and has many pits and grooves on the occlusal surface, which can easily trap food residues. In addition, most children do not like to brush their teeth and like to eat sweets. Caries often occur. Once it occurs, it should be treated as soon as possible.
Pay attention to correcting children's bad habits. During the teething period, when deciduous teeth are loose and about to fall out, children often have the habit of licking the loose teeth with their tongues.
This is a bad habit that will affect the normal eruption of permanent teeth and should be corrected in time to prevent misalignment (irregular tooth arrangement). Problems with misaligned bites must be diagnosed and treated promptly.
During the teething period of children, teeth are being replaced, jaws are developing, and the bite relationship is gradually established. Sometimes temporary misalignment occurs. During the development of teeth, they can often adjust themselves and return to normal.
Some misaligned bites, such as the labial frenulum of the upper lip being too low, resulting in an excessively large gap between the upper front teeth, cannot be adjusted by oneself, which will affect facial development. Parents should take their children to the hospital for diagnosis and treatment in time, otherwise it will affect the child's future appearance.
Supervise your children to brush their teeth every day. It is best for an adult to help you brush the teeth before going to bed at night, especially the double row of teeth, which are more difficult to clean and are most likely to lead to dental caries.
It is also difficult to brush the six-year-old molars, because they are located at the innermost part of the mouth. You must use children's toothpaste and toothbrush. The toothbrush head should be as small as possible, otherwise it will reach the innermost part of the mouth. Babies vomit easily. In addition to brushing your teeth, it is best for your baby to rinse their mouth after each meal to maintain oral hygiene.
Try to avoid breathing through the mouth when your baby is sleeping. Because when the airflow passes through the mouth, the upper palate is subject to upward pressure and cannot develop downward normally, causing the upper jaw to bulge upward.
The left and right sides of the upper dental arch become narrower and the front protrudes forward. As a result, the erupted incisors not only tilt forward, but also become misaligned, forming gaping teeth. Correct some of your baby's bad habits in a timely manner.
For example, sticking out and biting the tongue, biting fingers or pencils, licking the teeth with the tongue, etc. These bad habits will affect the growth of the baby's teeth and lead to tooth deformation. Special protection is given to children’s sixth teeth.
Because it positions and fixes the height of the teeth in the entire mouth, it has a great impact on the development of the baby's jaw and face. It also plays an important role in the eruption and neat arrangement of other permanent teeth. role. Provide safety education to your baby regularly.
Try to prevent tooth loss caused by trauma. Psychological care During the teething period, children's self-esteem has been established. They don't care about the appearance of their front teeth, but they care deeply in their hearts.
If the child is teased in this way, the child will develop an inferiority complex and even lick his teeth desperately in the hope of growing them out quickly, but the result is counterproductive. Parents can tell their children that white swans are all transformed from ugly ducklings. Falling out front teeth and becoming ugly is a process of transformation, which proves that "baby, you are growing up soon", and every child has to go through this process.
Nutrition and dietary care As children grow older, parents should let their children eat more chewy foods such as jellyfish, peanuts, sugar cane, spiced beans, etc., to maintain a good stimulating effect on the deciduous teeth and promote the growth of the deciduous teeth. Comes off on time. When the child reaches about 10 years old, the front incisors and back molars have erupted. Parents can add some celery stalks, corn, apples and other foods to them to complete the tooth replacement smoothly and let the children have healthy and straight permanent teeth.
Common problems and causes during the tooth replacement period: Retention of deciduous teeth: Phenomenon: deciduous teeth do not fall out when they should. Reasons: Dislocation of permanent tooth germ; local inflammation; missing permanent tooth germ. Measures: Retained teeth that have erupted permanent teeth but have not yet fallen out as deciduous teeth should be extracted as soon as possible to avoid affecting the eruption of permanent teeth in their normal position.
For those who have exceeded the tooth eruption age but have not lost their deciduous teeth and have not yet erupted their permanent teeth, do not pull them out easily, because if the permanent teeth are congenitally missing, the deciduous teeth should be kept as much as possible. Premature loss of deciduous teeth: Phenomenon: deciduous teeth fall out before the time they should fall out.
Measures: A gap maintainer should be worn in the gap between the deciduous teeth to prevent the teeth on both sides from tilting until the permanent teeth erupt. Difficulty in the eruption of permanent teeth Phenomenon: The permanent teeth have not erupted beyond the replacement period.
Reasons: premature loss of deciduous teeth; supernumerary teeth; obstruction by odontoma or cyst; abnormal development of the permanent teeth themselves; double-layered tooth phenomenon caused by genetic factors: the permanent teeth are drilled out before the deciduous teeth fall out, resulting in dental Arrange in two rows, front and back. Reason: It may be caused by the roots of deciduous teeth not being completely resorbed.
Measures: Determine the relative positions of deciduous teeth and permanent teeth through oral X-rays to diagnose whether deciduous teeth will fall out on their own or need to be extracted. .
4. What is the knowledge about tooth replacement in young children?
The order of children’s tooth replacement period: When a child is about 6 years old, the first permanent molar will grow immediately behind the last deciduous molar, also called the sixth molar. Molars; slightly earlier than or at the same time as the eruption of the lower central incisors, the deciduous lower central incisors (the two lower front teeth) fall out around the age of 6, the permanent lower central incisors erupt, and the deciduous upper central incisors erupt at the age of 7-8 (Two upper incisors) fall out, the permanent upper central incisors grow in, the deciduous lower lateral incisors fall out, and the permanent lower lateral incisors grow in; 8-9 years old, the deciduous upper lateral incisors fall out, and the permanent upper lateral incisors grow in; 9-12 years old The first and second deciduous molars fall out at the age of 10, and the first and second bicuspid teeth erupt; at the age of 10-12, the deciduous canines fall out and the permanent canines erupt.
Retained or premature loss of deciduous teeth There is a certain time and order for deciduous teeth to fall off. They should fall off without falling out, which is called retained deciduous teeth. The consequence is often that permanent teeth cannot erupt in their normal positions. Tooth loss usually begins with the lower two front teeth, followed by the upper two front teeth.
The most common thing is that the lower front permanent teeth erupt on the inside of the deciduous teeth, and the upper front permanent teeth erupt on the outside of the deciduous teeth. It looks like a double layer of teeth. If this happens, you should take your child to the hospital as soon as possible. The dental department of the hospital extracts the retained deciduous teeth. If the deciduous teeth fall out before they should fall out, it is called premature loss of deciduous teeth. This will often cause the adjacent teeth on both sides to tilt toward the missing tooth space, making the gap between the missing teeth smaller. The permanent teeth will erupt in a misplaced position due to insufficient space. At this time, they should be Wear a gap maintainer in the gap between the deciduous teeth to prevent the teeth on both sides from tilting until the permanent teeth erupt.
Is there any difficulty in the eruption of permanent teeth? If deciduous teeth fall out prematurely, children are accustomed to chewing and licking with their gums, which will cause the gums to become thick and hinder the eruption of permanent teeth. Calcium deficiency is also an important reason for the delayed eruption of permanent teeth. Parents should provide calcium supplements to their children in time.
During tooth replacement, the front permanent teeth erupt from below or inside the deciduous teeth. The erupted permanent teeth are the size of adult teeth. Mild crowding and torsion are normal, and can be affected by the eruption of adjacent teeth and the jawbone. It adjusts and aligns itself according to the growth and development of the teeth. As long as it is not a cross-bite (i.e. a crooked tooth), there is generally no need for correction.
5. What is the common sense of oral hygiene for primary school students
The dangers of dental caries
1. Affect chewing function;
2. Effect on permanent teeth Adverse effects on development: When deciduous teeth are deeply carious, it can directly affect the growth of the corresponding permanent tooth germs, causing caries in the permanent teeth that erupt after tooth replacement;
3. Can cause systemic infectious diseases: dental pulp The cavity contains a rich vascular network that is connected to the capillary network of the whole body. After dental pulp infection, bacteria can spread to other parts of the body along the vascular network;
4. Adverse effects on facial development: due to The side of the affected tooth is not conducive to chewing. Excessive chewing of the teeth on the other side can cause the jaw bone on that side to develop slowly while the jaw bone on the opposite side develops slowly, resulting in left-right asymmetry of the face;
5. Affects appearance and speech: Teeth Together with the vocal cords and tongue, they constitute the human pronunciation system. Premature loss of teeth due to dental caries will affect correct pronunciation and speech. Moreover, dental caries and missing teeth will also affect the appearance.
How to prevent tooth decay
Even if bacteria decompose food in the mouth to form acidic substances, it will take some time for the acidic substances to act on the teeth to break down the enamel and form cavities. As long as you brush your teeth clean immediately to prevent acidic substances from coming into contact with the teeth for a long time, there will be no tooth decay. Therefore, it is very important to rinse your mouth and brush your teeth in time after each meal. Plaque is most likely to form at night, so brushing before bed is especially important.
Oral hygiene knowledge 3: tooth replacement
The order of loss of deciduous teeth
1. Central incisors - 6-7 years old
2 , Lateral incisors - 7-8 years old
3. Canines - 10-12 years old
4. First primary molars - 9-11 years old
< p> 5. Second deciduous molars - 10-12 years oldPrecautions during the tooth replacement period
1. Pay attention to whether the deciduous teeth are retained: there is a certain time and order for the deciduous teeth to fall off, so you should Falling off but not falling out is called retained deciduous teeth. When encountering this situation, parents should take their children to the hospital as soon as possible to remove the retained deciduous teeth to make room for the eruption of permanent teeth;
2. Pay attention to whether the eruption of permanent teeth is difficult: deciduous teeth fall out prematurely, and children are used to using As a result of chewing and sucking, the gums will become thick and tough, hindering the eruption of permanent teeth. Calcium deficiency in children is also an important reason for delayed eruption of permanent teeth. Therefore, if your child reaches the age of teeth replacement but the permanent teeth have not yet erupted, you should take your child to the hospital for a timely check-up.
3. Pay attention to your child’s oral hygiene: During the tooth replacement period, deciduous teeth and permanent teeth are still present. The permanent teeth have just erupted, and there are many pits and grooves on the occlusal surface, which can easily retain food residues. In addition, young children do not like to brush their teeth. , loves to eat sweets, and often has dental caries. The most important thing at this time is to teach your children the correct way to brush their teeth.
4. Pay attention to correcting children’s bad habits: During the teething period, when deciduous teeth are loose and about to fall out, children often use their tongues to lick loose teeth. This is a bad habit that will affect the normal development of permanent teeth. Eruption, causing a malocclusion—that is, the teeth are not aligned properly. Parents should correct it promptly.
5. Regarding the correction of occlusal misalignment: Some misaligned occlusions are due to pathological reasons. For example, the position of the upper lip frenulum is too low, causing the gap between the upper teeth to be too large. It cannot be adjusted by itself, which will affect facial development. It should be Go to the hospital for correction, otherwise it will affect the child's appearance.
6. What should be paid attention to during tooth replacement?
Children must also be "disciplined" when changing teeth. More and more older children and children are beginning to pay attention to their oral beauty, or take care of their teeth. Braces, or surgery, can be said to arm your teeth. It is not an exaggeration at all.
It is said that in Japan, Europe and the United States and other countries, wearing braces is also considered a fashion. In fact, it is not that braces have become popular, but that there are more loose teeth and their unbridled growth has affected the appearance of the owner.
In fact, if the strict "standard normal jaw" is used as the reference data, the rate of misaligned teeth among adolescents in our country can be as high as 80-90%. Knowing this number, it is not difficult for us to understand why more and more parents are paying attention to their children's dental problems.
The causes of uneven teeth include not only human evolution factors, but also environmental and replacement factors. Parents need to be reminded that it is best to start correcting misaligned teeth at the age of 12. Before that, the child's deciduous teeth may not have been replaced, and after that, more correction time and energy will be needed.
Why is it so difficult to find a beauty with "teeth like a braided shell"? When ancient people described beauty, they often used the word "teeth like a braided shell". According to modern aesthetic concepts, people with white and regular teeth are not only beautiful, but also more confident.
Why are "teeth like braided shells" so rare nowadays, but there are so many people with crooked teeth? Dr. Shen Gang from City No. 9 Hospital explained the reason. The first is the evolutionary factor.
In the process of human evolution, many organs are degenerating, and the degree of degeneration of each organ is different. The relatively small alveolar bone cannot accommodate the relatively large teeth, resulting in crowded and uneven teeth.
The second is environmental factors. Because "you can't tire of fine food and fine food", the chewing function cannot be fully exerted, and the alveolar bone cannot get enough stimulation, which limits the growth of the jaw bone, thus causing tooth crowding.
Some children have the habit of sucking their thumbs, licking their tongues, biting their lower lips, and breathing through their mouths when they were young. This has a negative impact on the normal eruption and positioning of teeth, and can also cause uneven dentition. . Replacement barriers.
For example, premature loss of deciduous teeth or overdue replacement of deciduous teeth will cause the eruption of permanent teeth to become misaligned, which is also an important reason for uneven dentition. "However, in life, it is very difficult to find an ideal jaw with absolutely neat teeth. It would be good if most people can achieve the standard jaw.
Therefore, there is no need to affect self-confidence." Department of Stomatology, Shanghai No. 6 Hospital Dr. Zou Derong said.
When should children start learning to brush their teeth? Research has proven that tetracyclines can cause tooth discoloration in children. It is necessary to promptly provide children with complementary foods that can not only supplement nutrition but also help the development of deciduous teeth, such as adding biscuits and baked steamed buns. etc. to exercise the chewing ability of deciduous teeth. Appropriately add some vegetables and fruits to children around 2 months old.
Many parents often wait until their children can brush their own teeth before starting to cultivate the habit of brushing their teeth, but it is too late. Once the deciduous teeth erupt around 6 months after a child is born, after breastfeeding or eating, parents should put gauze on the index finger to help clean the tooth surface. Teach Seguchi around the age of 3. Before the age of 4, parents should supervise and assist children in brushing their teeth.
Children should use the brushing method. First, use a children's health care toothbrush with a smaller brush head and softer bristles. Brush along the direction of the crown of the tooth. This can remove food and soft stains on the teeth and at the same time clean the roots of the teeth. Play a *** role. Children should choose medicated toothpaste, such as fluoride toothpaste, which can remineralize tooth enamel and prevent bacteria from adhering to the tooth surface.
In addition, parents should urge their children to develop good hygiene habits. Does your child have straight teeth? How do you know if your child has crooked teeth? The following are the four main manifestations of uneven teeth summarized by Associate Professor Qian Yufen of the Ninth Hospital for us. If you compare them and look at your baby's teeth, you will understand: Crowded teeth The teeth in the dental arch are not arranged in a natural and beautiful arc, but in a natural and beautiful arc. They are protruding forward or concave inward, or even overlapping each other.
The upper front teeth protrude forward. The teeth in the front part of the upper dental arch protrude forward, and drive the upper lip upward. In severe cases, the lips cannot close naturally. Protrusion of the lower front teeth Contrary to the normal jaw, the lower front teeth bite in front of the upper front teeth and drive the lower lip to protrude forward.
The protrusion of the upper and lower teeth is commonly known as "protruding teeth". The upper and lower teeth protrude forward at the same time, causing the entire lip to protrude forward. In severe cases, the upper and lower lips cannot close naturally, resulting in "open lips and exposed teeth".
At what age is the best time to have your teeth straightened? By around 12 years old, most of the permanent teeth in the mouth have erupted, and the uneven teeth have basically been finalized. During this period, the child's maxillofacial development is still in a period of rapid growth and development, allowing the efficiency of tooth movement and alveolar reconstruction to reach optimal levels.
In addition, children’s psychological development has become increasingly mature at this time, so dentists generally believe that the best time for orthodontic treatment is at the age of 12. Orthodontics is mainly performed by wearing braces.
Before wearing the orthodontic device, the doctor will take pictures of the child to understand the development of the jaw bone and design a plan. Sometimes, the doctor may also need to remove the first and second teeth at the bottom. canines to make enough room for the teeth to line up properly. After the braces are installed on the teeth, you need to go to the hospital for review every one to two weeks initially, and the doctor will adjust the tightness of the braces. Later, the review time can be extended to one to two months.
In this process, what parents need to do is to cooperate with the doctor to help their children overcome the soreness and tingling caused by wearing discomfort, protect the corrective device, and cooperate with the rubber band. Replacement, application of extraoral arch, etc. Strictly follow the doctor's requirements for follow-up visits on time. Normally, braces need to be worn for about two years to achieve a more stable and satisfactory standard jaw state, and after that, retainers need to be worn for about half a year to a year to further consolidate the results of the correction.
Therefore, orthodontic treatment is also a long and slightly painful process, and both parents and children should be mentally prepared accordingly. Parents should pay more attention to their children's teeth at ordinary times. When they find small black dot-like cavities, they should go to the hospital for treatment in time. If the teeth really need to be extracted or the deciduous teeth are lost prematurely, it is necessary for parents to take their children to the hospital to install spacers. The device is used to prevent the teeth on both sides from tilting and maintain the eruption position of the permanent teeth until the permanent teeth erupt.
It is necessary to bite more during the teeth changing period. Some parents have toothache and cannot bite when their children are teeth changing, causing the food to become rotten. Therefore, the children do not need to move their mouths to bite more. Experts say that parents are doing a disservice. When teeth are replaced, they should bite more, eat more, and allow the jaws to expand and grow to avoid crowding of the gums.
You can brush your teeth during the tooth replacement period. If you lose a tooth and there is a hole in the middle, if you brush too much, will the tooth not grow back? Parents have a lot to worry about.