The baby’s milk teeth are also very important, and mothers should not think that these milk teeth will be changed, so they do not take them seriously, mothers must pay attention to it. The common problems and their solutions during the period of tooth replacement: 1.milk teeth retention If the baby’s permanent teeth have erupted, but the milk teeth refuse to “give way” to fall off, it is called milk teeth retention. There are usually two reasons for retained milk teeth: (1) congenitally missing permanent teeth (found through x-rays that the baby does not have permanent teeth), resulting in the milk teeth not falling out when due. This kind of retained milk teeth can be retained if they are not loose or decayed, and if the occlusal relationship of other permanent teeth is good, because clinical experience shows that they can still perform chewing functions in adulthood. (2) The direction of permanent tooth eruption is abnormal, or the eruption is not strong enough, so that the root of the milk tooth is not pressed by the eruption of permanent tooth and therefore the resorption does not occur or the resorption is incomplete, resulting in retention. It is generally believed that if the baby is deficient in calcium, or if the food he chews is too fine and does not give full play to the physiological stimulation of the teeth, this situation is likely to occur. The consequence of this condition is that the baby has “double row teeth”. The solution should be to take your baby to the dentist as soon as possible, usually to remove the baby teeth. Early loss of baby teeth Early loss of baby teeth refers to the early loss of baby teeth before the permanent teeth are formed, which will affect the baby’s chewing, and is not conducive to the baby’s digestion and absorption of food, and will also cause the neighboring teeth to shift to the gap of missing teeth, making the gap of missing teeth smaller, resulting in the misalignment of the corresponding permanent teeth because there is not enough space to erupt when the teeth are replaced. Solutions Prevention is the main focus, educate your baby to care for their teeth and reduce trauma through safety education. If premature loss of baby teeth has already occurred, visit the dentist to see if a gap retainer should be worn. 3. Molar caries During the period of tooth replacement, the baby’s permanent molar teeth are prone to caries because the baby teeth coexist with the permanent teeth, and the molar teeth with large volume and many sockets on the occlusal surface often retain food residues, and the baby often does not brush thoroughly enough to clean the molar teeth easily. The solution is to teach the baby to improve brushing skills, or to have the parents brush the baby’s teeth themselves during the more important period. Tooth decay can cause apical disease and affect the growth of secondary permanent teeth, so it needs to be paid high attention, and if tooth decay has already occurred, it is necessary to see a dentist. Even if only the milk molar has caries, it should be treated in time, you can’t think that the milk teeth will be changed sooner or later and ignore it, it will affect the eruption and growth of permanent teeth. During the period of tooth replacement, in addition to tooth replacement, the jawbone is also developing, and the bite relationship is slowly established. During the period of alternation of milk and permanent teeth, the alignment of teeth is often not so good-looking, there will be crooked situation, permanent teeth are rarely in place to grow to the position of the long, medically known as temporary misalignment bite. Parents need not worry because the human body has a tendency to align its teeth and will adjust itself during the process of tooth development so that the misalignment returns to normal. Even if orthodontics is needed, it is usually done after the alternation of permanent teeth is completed. However, if there is a misaligned bite that cannot be adjusted by the teeth themselves (this should be diagnosed by the dentist), it should be treated promptly to avoid affecting the baby’s appearance. 5.Multiple teeth The proverbial “thief’s teeth”, that is, unwelcome growth of extra teeth. Solution Parents should always pay attention, such as the discovery of suspicious teeth to see the dentist in time to determine whether the extra teeth, if not eradicated in time, will affect the normal eruption of permanent teeth. 6.Incisor gap There is often a gap between the upper and lower incisors (incisors) of the baby, and some of them even have a figure of eight shape. Solutions Usually, the gap will disappear naturally after the baby grows lateral incisors, so there is no need to worry. Of course, there are a few cases where the gap is caused by the presence of multiple teeth between the two incisors, which should be solved by removing the multiple teeth after taking an X-ray. 7. Tiger teeth The permanent cuspids are the latest to erupt, and when they erupt, they may only grow out on the labial side because the alveolar bone in the front area is occupied by other teeth, forming tiger teeth. It is important to note that tiger teeth should not be easily removed because cuspids are the longest and strongest roots of the teeth in the mouth, and they have a unique tearing effect on food, without which the child’s chewing power decreases and he may not be able to eat things like ribs and sugar cane in the future. If orthodontics is needed, doctors will also choose to remove the first or second bicuspid for orthodontic purposes. Parents should not take the liberty of dealing with tiger teeth just to look good.