Brushing Disease Enamel Extraction Factcheck Gums Health Health issues Healthly Hearth Interesting Life Medicine Medix Prevention Surgeon Teeth Tooth Toothache Trauma What to know Whitening White spots Xylitol
Tooth enamel is the hardest substance in the human body, but, until now, no one knew how it managed to last a lifetime. The authors of a recent study conclude that enamel’s secret lies in the imperfect alignment of crystals.