1. Overnutrition: good nutrition supply, early development of tooth germs, and permanent teeth can't wait to emerge when deciduous teeth don't fall off.

2, drink * * * carefully: the food is too soft and fine, the root of deciduous teeth has not been fully * * * and exercised, and it is closely connected with alveolar bone and is not easy to fall off.

3. apical lesions of deciduous teeth: deciduous teeth are decayed, which will cause root resorption disorder of deciduous teeth in severe cases, resulting in deciduous teeth not falling off in time. What should I do if my baby has double rows of teeth?

1. Pull out the deciduous teeth in time

When a child has double rows of teeth, he should go to the dentist to pull out the deciduous teeth in time. If the deciduous teeth are not pulled out in time, the permanent teeth may grow out of place and obliquely, and the permanent teeth can only be aligned by correction in the later stage. Pull out the retained deciduous teeth when the permanent teeth just erupt, and the permanent teeth can be automatically adjusted to the appropriate position.

2. Adjust the diet structure

In addition, adjust the diet structure appropriately. Nowadays, children's diet structure is fine, so children should pay attention to eating more high-fiber or hard food. This is not only beneficial to the alternate replacement of primary and permanent teeth, but also beneficial to the development of jaws, as well as the cleaning and health of teeth. Harm of "double row of teeth"

1. The retention of deciduous teeth caused by inflammation leads to the abnormal position and direction of new permanent teeth, and even the failure to erupt, which will have an impact on children's jaw development, chewing effect, oral hygiene and facial beauty, and generally can cause uneven dentition, resulting in "overwhelming".

2. The baby's deciduous teeth are delayed and slightly loosened, which causes discomfort to children. If the baby's teeth are not clean and hygienic, it will easily lead to plaque retention and tartar formation, which will lead to bad breath, which may induce oral inflammatory diseases such as dental caries, pulpitis and periapical periodontitis of new permanent teeth.

3. Residual roots of deciduous teeth can stab the surrounding mucosa and soft tissues, and in severe cases, it can cause traumatic ulcers.