The general recommendation is to use over-the-counter whitening products up to two times a year. Using whitening products too often can lead to increased tooth sensitivity or white spots — this is natural and due to certain areas of your teeth that have a lack of calcium (also known as hypocalcification). Excessive whitening can make the spots more prominent.
dentist kings cross
^ SCCNFP (1999). Scientific Committee on Cosmetic Products and Non-Food Products intended for Consumers. Hydrogen peroxide and hydrogen peroxide releasing substances in oral health products. SCCNFP/0058/98. Summary on http://europa.eu.int/comm/food/fs/sc/sccp/out83_en.html and http://europa.eu.int/comm/food/fs/sc/sccp/out89_en.html(read 2002.31.10) Cost of Dental Implants HIDDEN DANGERS