When a patient comes for their first consultation, one of the questions they always ask is ‘How long will my treatment take?’ Although this information matters to them, and sometimes even decides whether they start treatment at all, there is no way for us to give an exact answer. Treatment time depends on many factors: how complex the problem is, the patient's age and sex, whether they can visit us regularly, how well they cooperate with treatment (for example, whether they wear their elastics), the density of the jawbone, whether they take any medication that affects metabolism, whether they have any medical conditions, whether brackets come off through carelessness, whether they clean their teeth well, and which type of treatment they have chosen – appliances, braces (metal or aesthetic) or aligners. When we give you a treatment time, it is based on average figures from studies on how quickly a problem similar to yours is treated, so it is an estimate.
This answer is for general information. Your own case needs an examination by an orthodontist.