Invisalign is a state-of-the-art alternative to traditional braces. It is a series of clear, removable, plastic aligners made with 3-D computer technology according to the teeth. The aligners are replaced approximately every 2 weeks as the teeth are gradually straightened. Invisalign aligners are clear and are virtually invisible, and they are more comfortable than braces. Teeth with Invisalign treatment are easier to keep clean than with braces, and they have less chances of getting cavities.