The knowledge about coronavirus (COVID-19) among populations in two different Arab countries.

Unlabelled: COVID-19 is an infectious disease caused by a newly discovered coronavirus. Most patients infected with the COVID-19 virus experience mild to moderate respiratory symptoms and heal without any special treatment. This survey aimed to assess the knowledge of Syrian and Saudi populations about the general information, symptoms, and methods of prevention of coronavirus (COVID-19).

Radiographic Assessment of the Quality of Root Canal Fillings Performed by Senior Dental Students.

Objective: To evaluate the radiographic technical quality of root canal fillings performed by senior dental students at Alfarabi colleges for dentistry, Kingdom of Saudi Arabia.

Methods: Radiographic assessment was conducted for 246 teeth (390 root canals) endodontically treated by senior dental students to evaluate the quality of root canal fillings. Three criteria were evaluated to assess the technical quality of root canal fillings: length, density, and taper.

Radiographic Assessment of the Prevalence of Pulp Stones in a Yemeni Population Sample.

Objective: To determine the prevalence and distribution of pulp stones in the posterior teeth of a sample of adult Yemeni dental patients using digital panoramic radiographs.

Methods: In total, 913 panoramic radiographs from patients attending the hospital dental clinics of at University of Sciences and Technology, Sana'a, Yemen, from January 2013 to December 2014 were examined. The occurrence of pulp stones in the posterior teeth of adult subjects was recorded.