40
Participants
Start Date
September 28, 2021
Primary Completion Date
April 8, 2022
Study Completion Date
April 8, 2022
DIY face mask
Participants are wearing a DIY face mask for 4 hours (beginning between 8 and 9 a.m.). The correct fit of the face mask is checked by the study officials and corrected if necessary.
Surgical face mask
Participants are wearing a surgical face mask for 4 hours (beginning between 8 and 9 a.m.). The correct fit of the face mask is checked by the study officials and corrected if necessary.
FFP2 respirator mask
Participants are wearing a FFP2 respirator mask for 4 hours (beginning between 8 and 9 a.m.). The correct fit of the face mask is checked by the study officials and corrected if necessary.
Waiting for 4 hours without wearing a mask
Participants do not wear any face mask for 4 hours (beginning between 8 and 9 a.m.).
Use of fluoridated toothpaste
Participants use fluoridated toothpaste.
University Medical Center Goettingen, Dept. of Preventive Dentistry, Periodontology and Cariology, Göttingen
University of Göttingen
OTHER