In order to begin Invisalign treatment, your teen must have all their permanent teeth, with the exception of wisdom teeth. This means your child will likely be around 14 years old when they’re eligible for Invisalign Teen. Maturity and responsibility are also incredibly important for successful Invisalign treatment. The aligners have to be worn for 20 to 22 hours each day as well as being removed for eating and cleaned properly. If you’re unsure that your teen will wear the aligners, Invisalign has accounted for it. There are blue dot indicators on each Invisalign Teen aligner that fade with continued wear. A solid blue dot means your teen hasn’t been wearing the aligner as they should.