Whitening strips bleach surface area stains. They also penetrate tooth enamel and dentin to remove intrinsic stains from deep inside the tooth. If not utilized properly, they can be dangerous for your teeth. Some are remaining on teeth (even made being still left on overnight), while some are meant to https://top-quality-teeth-whiteni39639.collectblogs.com/78762588/teeth-whitening-manufacturers-no-further-a-mystery