Invisalign First for children is mainly intended for kids aged 6 to 10 in the mixed dentition stage, when baby teeth and permanent teeth coexist. At this stage, the treatment focuses on using aligners to guide the eruption of permanent teeth and expand arch space, addressing issues such as crowding, underbite, or protruding teeth. Treatment during this stage can build a strong foundation for later orthodontic treatment and shorten future treatment time.

Invisalign Teen is suitable for adolescents aged 11 to 19. At this stage, almost all permanent teeth have erupted, while tooth movement and bone development are still ongoing, making it the golden period for orthodontic treatment. A special feature of Invisalign Teen is the blue Compliance Indicator on the aligners, which fades with wear time, making it easier for parents or the dentist to monitor usage and help ensure treatment effectiveness.

Adult Invisalign is suitable for adults whose permanent teeth have fully developed. Orthodontic treatment at this stage mainly improves issues such as crooked teeth and malocclusion. Since an adult's bones have already matured, treatment usually takes a bit longer than for teenagers, but Invisalign remains very popular because of its aesthetic and comfort advantages, making it ideal for those who need to balance work and social life.