Clear aligners are a type of orthodontic treatment that uses a series of clear plastic trays to gradually shift teeth into their proper position. They are an alternative to traditional braces and are virtually invisible, making them a popular choice for adults who are looking to straighten their teeth without the appearance of metal braces. Clear aligners are custom-made for each patient and are typically changed every two weeks to keep teeth moving in the right direction. They can be removed for eating and brushing, making them a convenient option for many people.