Normal children start to grow teeth around 4-10 months old, but Ling Ling is 11 months old and her first milk tooth is still not coming out. When she saw that other babies of her age had already gotten a few teeth, her mother was really anxious: “Why is there no tooth growth yet? Is there a calcium deficiency? Should I take calcium supplements?” The doctor considered that Lingling’s late teething might be related to her nutritional status, and because Lingling was not yet teething, her parents had been giving her only soft burnt food to eat, which also affected her teething to a certain extent because of the lack of chewing exercise, so it was suggested to strengthen nutrition and at the same time, to properly exercise her chewing function to promote teething. Usually babies start to erupt their first milk teeth around 4-6 months, if they are not teething by eight or nine months, some parents start to get anxious, either by carrying their children to the hospital for help or by giving their babies calcium tablets or cod liver oil without permission. This anxiety of parents is understandable, but is it necessarily a calcium deficiency if the child is still late in teething? In fact, except for a very small number of congenitally edentulous babies, most babies already have ossified milk teeth in their jawbone at birth, but they have not yet emerged, and we can only see the baby’s upper and lower jaws covered with red gum pads. There are individual differences in when the first milk teeth come out, early teething starts 4 months after birth, late teething can wait until 10 months or 1 year, or even 1 year before the teeth erupt. Congenital edentulism is extremely rare, and it is generally considered to be delayed teething if the baby’s teeth have not erupted by more than 12 months. So, what factors are responsible for the late teething of babies? 1, genetic factors The early and late teething is related to genetic factors, parents who are late in teething when they are young, their children will also be relatively late in teething. In addition, research has found that there are differences in the timing of teething between genders, with boys generally teething a little later than girls. 2, nutritional factors Healthy teeth are closely related to protein, calcium, phosphorus, fluoride, vitamins and other nutrients. Insufficient protein intake can cause delayed tooth eruption, adequate calcium, phosphorus and fluorine help the baby teeth calcification, adequate vitamins are not only required for the child’s overall development, but also extremely important for the development of teeth. When the baby’s diet is not balanced, the lack of these nutrients in the body can also cause late teething. In addition, children who are severely malnourished, their growth and development is slower and their teeth will also come out later. Therefore, mothers and fathers should pay attention to the baby’s balanced diet and supplement rich nutrients to ensure the normal growth of baby teeth. 3, add complementary food When the child grows to 4 months, some mothers and fathers think that the baby is still too small to swallow and dare not try to add burnt food to the baby, not knowing that this may make the gums lack effective stimulation and eventually affect the eruption of baby teeth. When the baby grows to 4 months, mom and dad should start to add muddy food to the baby, the first choice is to contain a variety of vitamins and minerals fortified nutritional rice flour, such as mashed potatoes, mashed eggs, mashed apples, etc. Later. When the baby grows to 6~7 months, the amylase function in saliva has slowly become perfect, this time you can give the baby some cookies and other food, at first the baby may just use saliva to soften the food and then swallow, slowly he will learn to grind the food with gums, try to chew, these chewing actions are conducive to the eruption of milk teeth, through chewing, the baby’s jawbone and dental bed can get better Through chewing, the baby’s jaw bone and dental bed can be better developed, which is conducive to the normal eruption and alignment of teeth. 4, the disease factor When the baby suffers from rickets or hypothyroidism, it can also cause its delayed toothlessness. Therefore, if the baby has not erupted the first tooth more than 1 week old, you also need to consider whether it is due to rickets or endocrine factors. However, whether the late teething is caused by disease factors should be left to the professional doctor to determine. In conclusion, there are many reasons for the late teething of babies. When parents see that their babies are late in teething, they should not think that it is due to calcium deficiency and give them calcium supplements or cod liver oil without authorization, but they should leave it to the professional doctor to judge and correct it under the doctor’s guidance in order to really improve the teething.