Invisalign treatment is not suitable for everyone, and certain factors may disqualify a person from being a good candidate for this type of orthodontic treatment. Some conditions that may disqualify a person from using Invisalign include severe or complex dental issues, significant tooth rotation or vertical movement, skeletal discrepancies, and age-related issues such as incomplete tooth eruption. Additionally, some patients may not have the discipline required to wear the aligners for the required 20-22 hours a day, which may also disqualify them from using Invisalign.