Shark Teeth: Naturally Cavity Fighting?

The Journal of Structural Biology published a 2012 study that found that at least two species of sharks, makos and tiger sharks, feature teeth whose outer coatings contain one hundred percent fluoride.  Scientists have discovered that sharks' teeth are cavity-resistant because their enamel is comprised of a chemical called fluoroapatite that is impervious to acid-producing bacteria. The fact that sharks have teeth that contain their own cavity-fighting fluoride and that they replace their teeth throughout their lives, makes sharks models of dental health.  For the full article click here.