Chewies are small, cylindrical accessories designed to support clear aligner orthodontic treatment. They are soft, sponge-like tools that resemble a cotton roll and are a common inclusion in clear aligner kits, such as those used in Invisalign therapy. Their purpose is to help patients ensure their aligners fit securely and completely over their teeth. Using these simple devices is a recommended component of a successful treatment routine.
What Chewies Are and Why They Are Needed
Chewies are typically made from a durable, medical-grade polymer material, such as styrene copolymer or silicone, which provides a resilient yet pliable texture. They are sometimes referred to as aligner seaters because their main function is to facilitate the proper seating of the clear aligner trays onto the teeth. The aligners are precisely engineered to apply pressure that guides teeth into new positions, but they must fit tightly for this pressure to be effective.
When a new aligner is placed, or if it feels slightly loose, a small air gap can form between the plastic tray and the tooth surface. This gap means the aligner is not fully “tracking,” which can delay progress. Biting down on a chewie compresses the aligner material against the teeth, effectively pushing out trapped air and eliminating these gaps. This action ensures the aligner makes full contact, allowing the intended force to be consistently delivered for predictable movement.
Step-by-Step Guide to Using Chewies
The physical act of using a chewie is straightforward, but technique and consistency are important for maximum effectiveness. With the clear aligners already secured over both the upper and lower teeth, the chewie is placed between the biting surfaces. Patients should bite down gently yet firmly on the accessory, holding the pressure for several seconds before releasing and repeating the action.
The chewie should be systematically moved around the mouth, from one side to the other, to ensure all teeth receive equal attention. It is especially helpful to focus the chewing action on any areas where the aligner feels loose or where a visible gap is present. Orthodontists frequently recommend using the chewie for a total duration of five to ten minutes per day. This usage is most beneficial immediately after inserting a new set of aligners or right before bedtime to ensure a snug fit overnight.
Cleaning, Maintenance, and Replacement
Since chewies are placed directly into the mouth, maintaining their cleanliness is important for oral hygiene. After each use, the chewie should be rinsed thoroughly with warm water to remove saliva and debris. Periodically, they can be cleaned more extensively using mild hand soap and water, followed by allowing them to air-dry completely before storing them.
Chewies are reusable accessories, but they do not last indefinitely. The constant biting force causes the material to gradually lose its elasticity and firmness over time. When a chewie becomes flattened, indented, or noticeably less resilient, its ability to effectively seat the aligner is diminished. Patients should monitor the condition of their chewies and replace them promptly when they show signs of wear to maintain optimal performance.