However, the length of the protein

chain does not affect the enamel

strength, nor does it affect its

sensitivity.

When applied to the enamel, the

peroxide will cause a slight loss

of minerals on the surface of the

tooth. At the end of the treatment,

the minerals contained in the

saliva will remineralize within

a few days. In spite of the preceding

event, the teeth will remain sensitive

during that period.

If not well managed, the peroxide can irritate the gums and oral tissues. For that reason, and because of the high concentration of peroxide used in certain cases, the whitening methods are performed under medical supervision.