With the exception of certain joint problems, the aim of orthodontics is not to cure disease. So there are no objective criteria that automatically lead to treatment. The best thing to do is to look in the mirror and ask yourself what you'd change with a wave of your magic wand if you had the chance.
Although your orthodontist can't impose anything, he or she can nevertheless suggest measures to improve your situation and help you make a well-considered decision by professionally assessing the usefulness and necessity of your choice.
