What’s mask mouth? Local dentists say these oral issues have appeared during the pandemic Dr. Joseph Weber and dental assistant Daphne Stiles treat a patient Thursday, Feb 4, 2021, at Weber Dental on Enota Avenue in Gainesville. Dentists have witnessed an increase in cavities among patients and are linking it to mask-wearing. They're calling it "mask mouth." - photo by Scott Rogers A new term has been floating around dentist offices across the country.