Can braces make my teeth like the same length? (photo)

Orthodontics (moving teeth) will always tend to make the face longer and more narrow; ESPECIALLY if teeth are extracted. You have extremely narrow dental arches along with an anterior open bite. Your jaws are a symptom of an underdeveloped craniofacial complex. Your genetic potential did ...

Most patients with tongue thrusts also have underdeveloped maxillas.  Orthodontics does not address this issue.  Expansion with a DNA Appliance will create a more physiologic state less prone to relapse.Tongue thrust usually have an underlying issue thar was noot corrected.

It would be quite a challenge to make an old, non-fitting retainer realign your teeth.  Certainly not worth the time or effort trying.  Just get a new "active" retainer, or even aligners to take care of any minor issues.