Let's talk about why there is a problem of "don't lick when children change their teeth, or they will grow crooked":
1: There will be discomfort when changing teeth, discomfort between teeth, and discomfort when permanent teeth erupt.
When children feel uncomfortable, they will feel what is happening in that position. Tongue is the most sensitive organ, so they are likely to play where their teeth are changed.
3. The strength of the tongue is about 300g or more, with a force of more than one kilogram at most (please point out if the data is incorrect). However, the strength of orthodontics is generally around 50g, so if you lick your teeth with your tongue, it will be more effective than the whole tooth.
So it is not "without scientific basis". This topic can search "Orthodontic Clinical Treatment Based on Breathing and Periodontal Muscle Function", and describe the function and relationship of muscle, breath and tongue in orthodontics.
Let's talk about other behaviors that "kill" children's teeth besides licking their teeth:
1: suck fingers (eat fingers, eat pens, etc.). ). After 3 years old, if the child has the problem of biting his fingers with a pen, he must change it! Must be changed! Must be changed! !
The reason is that long-term biting of the pen and fingers will occur: maxillary protrusion, buckteeth, open jaw (the front teeth are not clenched), crowded teeth and so on.
2. Mouth breathing, because the environment is getting worse and worse, many children will breathe through their mouths. This problem must be changed! Must be changed! Must be changed! !
What happens when you breathe with your mouth: open your mouth for a long time, the upper jaw will be high, the dental arch will be narrow and crowded, and the upper teeth will smile! !
3. Tongue-spitting: Long-term tongue-spitting can also lead to jaw opening (the front teeth are not tightly bitten).
4. Bite the lower lip/upper lip: Needless to say, biting the upper lip becomes a big bag, and biting the lower lip becomes a big buck tooth! ! !
Off-topic: If you have bad oral habits, will it be over if you get rid of them? Don't be naive, habits have changed, but the problem remains! ! Therefore, if you want to study more, you should go to Zhihu and study more (all these are useless). The key is to see orthodontics!