Hello, according to what you said, the upper and lower lips can't close naturally. Is it because the teeth of the upper and lower jaws are too prominent, so the lips can't close? If so, the upper and lower teeth are too prominent, which is called bimaxillary protrusion. Generally, the front teeth are closer to the lips.

Suggestion:

It is suggested that orthodontic treatment should go to a regular specialized hospital for a clinical examination to see if this situation belongs to tooth malocclusion or skeletal malocclusion, because the two treatment methods are different. Orthodontic treatment is the best way to treat malocclusion. The upper and lower bicuspid teeth (that is, the first tooth or the second tooth counted backwards from the tiger teeth) are symmetrically extracted to make room for the front teeth to move backwards. Then, after formal orthodontic treatment, the front teeth will move backwards slowly to achieve a beautiful effect, and the upper and lower lips will naturally close. However, if it is skeletal malocclusion, single orthodontic treatment can not completely move the anterior teeth back. At this time, if the aesthetic requirements are high, orthognathic surgery is needed. Therefore, it is best to have a clinical examination and make a treatment plan accordingly.