I use white strips and I have to use them twice a day, once in the morning, and once at night. At night I have to wear my retainer, it is the kind with the metal bar across the front. If I use my whitening strips, rinse, then put my retainer on, will I end up having a big line across my teeth?
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No, fter the strip is off and the stuff has rinsed off, it isn't on there to work anymore, therefore cannot be altered by what you do to your teeth afterward.
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