Essix style orthodontic appliances are also sometimes referred to as “invisible” retainers because they’re made using clear plastic. These retainers are designed to maintain the new position of your teeth. They look very similar to Invisalign® aligners.
Pros: Virtually invisible on the teeth; less expensive than traditional removable retainers.
Cons: Does not allow the teeth to touch in a natural way. Wears out after a few years. Can be difficult to keep the interior surfaces clean. Traps liquid against the teeth.