Do the Buttons on Invisalign Have an Effect on the Teeth?

The "buttons" (attachments) are resin bonding material we place on the teeth. They are shaped and positioned so that we can get the proper torque needed for moving, rotating teeth during treatment. They are placed via bonding, and after treatment the attachments are removed and the teeth are polished back clean. The tooth appears just the same after the attachment is removed, and the tooth strength is not changed by the attachment.

The attachments are polished off at the end of treatment with no damage to the enamel. They are not snapped off like the old brackets which could damage the enamel. 

Invisalign buttons are made of composite, and therefore often difficult to distinguish between tooth when removing. Whe the dentist removes the buttons, they should take care not to remove tooth. I do this by using a polishing cup that removes the flowable composite quite easily while it only tends to polish the natural tooth's enamel. This wouldn't work as well if they use other types of composite than flowable. To be safe, they could err on the side of caution and leave composite and this would likely blend perfectly into the tooth anyway so it really should be easy for the careful clinician to remove the buttons.