Aligners are used to align the crooked teeth into a straight one without braces. Aligners are made of a strong type of plastic material called as polyethylene terephthalate glycol (PETG) and fabricated to fit each individual’s mouth. Aligners are removable appliances which are designed to exert programmed amount of force to bring out the desired tooth movement. In this treatment method, set of aligners are given to patients, in which the number of aligners and duration of wear is decided based on complexity of the mal alignment.
Dentist record the teeth positions using