These stains may result from antibiotic use, large amounts of fluoride exposure, along with your tooth enamel increasing thinner when you age. Intrinsic staining can at times even be genetic, Based on 2014 study. Possible threats and Negative effects. Whitening can result in non permanent sensitivity with your teeth and https://bookmarkinglife.com/story2450766/detailed-notes-on-teeth-whitening-south-africa