There are many different clear aligner therapy systems out now that are used to straighten teeth. I currently use Invisalign’s clear aligners to straighten my patient’s teeth. In general, the technology in the clear aligner therapy (CAT) world has significantly improved over the years, allowing tough cases of crooked teeth that were once thought could not be straightened with a piece of plastic, are now possible. Aligner materials have gotten better. They have more flex in them, allowing gentler pressures to straighten teeth. They also have better shaped attachments, which are tooth colored buttons glued to the teeth, that allows for improved tooth movement. Not to mention the technolog