Depending upon the condition for which you are given the braces, ideal time for braces removal is after two years and i would advise you to consult your orthodontist who is treating you as s/he might be having complete details regarding your progress report. Sometimes teeth though seems to be straight but needs appliances for adequate retention. So, schedule a meeting with your dentist. For more info on retention and relapse during orthodontic treatment visit the link....http://www.identalhub.com/dental-retention-and-relapse-934.aspx