Houston-area dentist links face mask use to increase in cavities
"If you're not used to (masks), it really can impede on our comfort of breathing. So what we tend to do is start breathing through our mouth rather than breathing through our nose," Dr. Piya Ghandi of West U Pediatric Dentistry told the TV station.
Breathing through your mouth more can lead to cavities, according to Ghandi.
"So saliva that usually protects our teeth from cavities is now getting dried out and making us more prone to cavities," she said.
https://www.chron.com/houston/amp/How-one-local-dentist-links-face-masks-to-an-15410179.php?