Dentists as well as their patients have long dreamed of the day when a pulled tooth could be replaced by another in the same operation. But so far, only a patient’s own teeth have worked well when ...

“Good teeth,” like other visible aspects of health, has long been a signifier of wealth, but recently the bar for good has vaulted skyward, even as the hygiene standard remains out of reach for many.

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...