Clear aligner therapy refers to a series of clear dental appliances that are formed to the shape of a patient's teeth. Clear aligners gradually improve appearance and function by applying gentle, consistent pressure to a patient's teeth, which stimulates osteoclastic & osteoblastic activity.
Clear aligners are popular because they can do a lot of the things traditional orthodontics can do, more discreetly and conveniently.
Many tooth movements are possible with clear aligners, and most types of malocclusion can be improved with clear aligner therapy. However, some cases are still better-suited for traditional braces, or a combination of techniques.
For additional information on the subject, you can watch the below video on how clear aligners work: