Did You Know!
Teeth Have a Unique “Crystal Structure” That Makes Them Harder Than Bones
Most people know teeth are strong, but few realize tooth enamel is made of tightly packed hydroxyapatite crystals, arranged so efficiently that enamel becomes the hardest substance in the human body — even harder than steel on a density level.
What makes this even more interesting: once enamel is damaged, it cannot regrow, because it contains no living cells.
