A retainer is an orthodontic appliance used for the maintenance after finishing multiple bracket period. 【how to use】 1. Prepare a level of warm water from 20 to 40 degrees enough for retainer to immerse. Put a tablet into that water. 2. Put the retainer in once the water changes to blue. 3. Wait for 10 minutes before the blue water changes into clear one again. Take the retainer out. 4. Rinse the retainer again with water. Made in japan
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