The Pros and Cons of Invisalign Treatment Invisalign tray is fabricated with a smooth plastic that is less likely to cause irritation to the inside of your mouth. They also require fewer emergency visits for broken brackets or poking wires because they do not contain metal pieces. Learn More- https://doc.clickup.com/90161068790/d/h/2kz09eqp-436/53044d6616bf5f2