Background: The coronavirus 2019 (COVID-19) pandemic had several mental effects on medical staff.
Objective: This study intended to evaluate deviations in Frontline Dental Staff (FDS) depression, perceived stress and hypochondria during the COVID-19 outbreak, and to assess whether the existence of potential risk-factors influenced these symptoms over time.
Methods: This prospective cohort study surveyed FDS three periods from February 1, 2021 to April 8, 2022.