Based on this plan, approved by you and where we can show you each stage of the treatment, we have unique aligners made. They are worn by you for between 20 and 22 hours a day, and every two weeks or so, a new set of aligners is provided by your dentist, along with a brief check-up to ensure that all is going as planned. Your teeth will gently move into place over time - every patient is different so the length of the process will vary.