According to the World Health Organization dentist offices might be a hot spot to catch COVID-19. This is due to all the face to face interaction and the difficulty of safe social distancing. WHO is warning people not to go to the dentist unless it is an emergency because of the risk.
Source: https://sfist.com/2020/08/12/dont-go-to-the-dentist-just-yet-warns-the-world-health-organization/