Almost anyone looking to improve their smile could be a good candidate for Invisalign clear aligner treatment. In general, however, Invisalign is usually best for minor to moderate misalignment issues including gaps and overcrowding. Teens and older adults tend to adhere best to the requirements for successful Invisalign treatment, including wearing the removable aligners for at least 22 hours per day, keeping track of them when they are removed, and keeping aligners and teeth clean, but there are many younger patients who can handle the responsibility just fine.  However, it’s usually the amount of correction needed rather than age that determines if a person is a good candidate. While Invisalign can treat a wide range of orthodontic issues, it may not be effective for patients with: Prior restorations or dental work like bridges Teeth that need to be raised or lowered Large gaps Teeth that are too short or that will not fit the aligners properly Severe malocclusions of the jaw, such as severe overbites, underbites, or crossbites Teeth that are too severely rotated These conditions will generally require full braces or other orthodontic appliances.