Hi, how long after getting braces put on and baby teeth extracted can a "fake" tooth or "flipper" be put on the wire?

Following an exam: following a clinical exam and treatment plan; most likely after your dentist takes an impression of your mouth in two weeks.

Soon: As long as there is sufficient room for the replacement tooth it should be able to be put on right away. Talk to your orthodontist . Sometimes they may want the tissue from the extraction to heal first. Unless great tooth movement is planned, I would prefer the tissue to form around the base of the tooth, to preserve the interdental papilla ( pointed gum tissue between teeth). Good Luck.

Immediately: Your orthodontist can attache a fake tooth onto your wire to help conceal the fact that you are missing a tooth. Can be done right away.

Ask your orthodontis: Since you are currently in braces and are under the care of an orthodontist, he/she would be the best person to ask this question. In your case it might not be a matter of how soon/how long, but if it is appropriate and when is it most appropriate. Anything we say here would be insufficient compared with your current treating orthodontist's opinion.

Asap: you can have it done at anytime. Sooner the better if you are trying to keep the place open for future options (implants etc)