Hi, I will try to answer your all queries one by one. First of all, at today's time there is no age bar for braces treatment. If gums are healthy then braces treatment can be done.Next answer ,time taken for braces depend upon, the amount of correction require and the amount of correction possible considering your expectations. Last answer, extraction is required or not can be decided after through check up and few radiographs of face and jaws.
Next Steps
Getting a OPG and Lateral Cephalogram radiograph done.
Health Tips
Many type of braces treatment options available considering your expectation and time.For details kindly contact on personal chat box.