The average orthodontic treatment plan is 18 months to three years. It's different for everyone, but anything that goes beyond a four-year treatment plan justifies getting a second, third, and fourth opinion. So how long does orthodontic treatment last? It can range from a few months to more than three years. On average, typical orthopedic appliance treatment for a healthy adolescent with adequate oral hygiene and excellent compliance will last between 18 and 24 months.
Adults will take a little longer, depending on the severity of their case.
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