Do fluoride and calcium from toothpaste really get absorbed by teeth? 0 6

Tooth enamel has the ability to absorb calcium and fluoride ions; however, their absorption from toothpaste occurs solely through diffusion, which happens slowly due to the high density of enamel.

During the few minutes we brush our teeth, significantly fewer ions penetrate the enamel than during the intervals between brushing from saliva.

At the same time, fluoride prevents the development of cavities not so much due to its penetration into the enamel, but rather by suppressing the metabolism of bacteria.