Chlorine and Your Teeth
Pools with too much chlorine contain pH levels that can cause enamel erosion as water occasionally seeps into your mouth during your swim session. And in recent years, more and more evidence shows the connection between improperly chlorinated pools and tooth damage.
New York University's College of Dentistry collected data in 2010 from a male patient who reported extremely sensitive teeth, dark staining and rapid enamel loss during the five-month period he began a 90-minute swimming routine in his backyard pool. Having found improper chlorination to be the cause of his enamel erosion, Dr. Leila Jahangiri, who authored the report, noted that pool water does become a threat to your teeth when its pH level falls below 7.
When your enamel wears down, your teeth may become discolored, the edges of your front teeth may look transparent and, in later stages, you may feel extreme dental sensitivity when consuming hot or cold foods. Once this enamel erodes, chips or even cracks, the body can't repair it – which is why toothpastes such as Colgate® Enamel Health™ Sensitivity Relief exist to keep your teeth strong before this material disappears.