Hello Lybrate user, if orthodontic extractions
were required for your previous Orthodontic treatment (braces, and avoided for whatever reasons then it is important to undergo a retreatment.
Since you are not satisfied with the results, and as your teeth were not extracted, there's a possibility of getting tooth extracted in this retreatment provided if interproximal stripping of tooth was not done. Regarding your age, Orthodontic treatment can be done at any age as long as you have healthy gum support and excellent oral hygiene. Adult Orthodontics
is very common nowadays, hence you need not worry about your age. As for your treatment please consult an Orthodontist
(braces specialist) for a detailed treatment plan. Regards.