Incisors off more than a year, how to still don't grow?

Incisors off more than a year, how to still don't grow?

Question:

Gender: male
Age: 8
History:
Description: my son was 8 years old, because last may, a tooth pulled out his front teeth, but it hasn't been out on the tooth, when when taken as permanent teeth is good. How should do?

Treatment:

Suggestions to further examination hospital gums.