فهرست نشریات علمی دسترسی آزاد ایران

Introduction Coronaviruses are a family of viruses identified in the 1960s (1). In December 2019 Chinese scientists and clinicians identified a new coronavirus, SARS-CoV-2 as the pathogen that causes the coronavirus disease 2019 (COVID19) (2, 3). Age is the most considerable risk factor for COVID-19 disease and its fatal clinical outcomes (4-6). Angiotensin-converting enzyme 2 (ACE2) receptors are the critical receptors for the pathogenesis of COVID-19(7). The virus has a high affinity to ACE2 receptors, which are expressed in alveolar cells in the lungs (3) A significant number of aged people have prescribed ACE2 inhibitors and angiotensin II receptor blockers to control hypertension, diabetes, and chronic kidney disease, therefore, these medications increase the risk of infection by SARS-CoV-2 (8).It has shown that ageing individuals with serious medical conditions are more susceptible to develop a severe illness due to COVID-19 infection than healthy individuals (9, 10). However, poor oral hygiene increases the risk of developing the same medical disorders. Thus, improving oral health in older people  may decrease the morbidity of COVID-19 (10). Also this specific population is at risk for developing severe complications related to COVID-19 (11, 12)