If the child fills the teeth after extraction and the whole back teeth have moved to the original position of the six-year-old teeth, no measures need to be taken. If the upper part of the posterior teeth is tilted and displaced, there is still a big gap in the root, which will affect the stress direction of the posterior teeth. We can consider straightening them by orthodontics, and then inserting teeth in the empty space.
Correction method when you grow up: my plan for you is correction+planting.
Specific description: it can be completed in two stages. First, the problem of the gap between the front teeth is solved by corrective method, and the position of the dental implant is reserved. It takes about three months, and the cost is about two thousand.
Then implant surgery.