When it comes to getting your teeth straightened, there is no set age at which you can begin treatment. For most cases, it is best to delay treatment until after all baby teeth are gone and the second molars have at least begin to protrude from beneath the gums.
Your dental care provider will take a series of x-rays in order to determine the best course of treatment. As long as bone density is good and teeth can be adjusted with the aligners, treatment may be possible at just about any age once baby teeth are gone.
Compliance is a major factor in the results you can get from treatment. The patient has to be old enough to wear the aligners as directed, with the physical capability to remove and replace the aligners.
People who are in their teens may be able to get Invisalign clear plastic aligners. Those who are in their 80s and have their original teeth may also make good candidates for the procedure. As with any other type of dental treatment, it really is an individualized process. It is important to discuss your options and your goals with a qualified Invisalign provider.