Braces After Root Canal and Crowns?

Most of the time it should be fine to get braces after a root canal.  Orthodontic forces are gentle and should not pose a problem. 

It sounds as if a post was placed inside the tooth after the root canal, so the tooth IS weaker than before, so there IS a risk of fracture or loss, but I would not let that prevent you from trying.

It is possible that the crown would need to be redone after the braces are off, so that might allow some freedom to fix any minor issues that might arise when complete.

yes, Orthodontic/braces treatment is possible with root canal treated tooth. I think you are talking about post [metal rod inside root canal], so it's my advice to upload an x-ray so that I can guide you better. Anyways in that case also braces treatment is possible.

Braces can be put on teeth with root canals and crowns, but they should be monitored during treatment and sometimes even moved a little slower.  I would recommend seeing an orthodontist who can fully analzye your teeth and bite as it is also important to consider the type and amount of movement the crown and root canal treated tooth need. 

In addition, it is important to understand why you had the root canal and crown on your front tooth initially. If there is a history of trauma to that tooth, then it is even more important to move it slower and monitor its status during orthodontic treatment.