Clear aligners are thin, transparent, plastic trays that are custom-made to fit snugly over your teeth and have been carefully programmed to apply small but deliberate pressure on your teeth in order to move them towards the correct position. You will be issued with a series of clear aligners that are worn in sequence to gradually move your teeth towards the intended position, improving both your bite and their appearance. They must be worn for at least 22 hours each day throughout treatment in order to be effective.