My son's upper and lower incisors are tilted inward, and his upper and lower teeth are not well occluded. The doctor said that there is no need for tooth extraction treatment, but the gum of the tooth should be nailed to correct it. Generally, the upper teeth tend to be corrected without extraction.

Nail the lower teeth. Maybe the lower teeth are too steep and need to be lowered (guess).

Nailing is less traumatic than tooth extraction, so don't worry too much.

If the child is underage, it will be better not to nail.

If adults don't nail it, the effect will be discounted.