Knowledge and awareness on novel coronavirus spread among dental fraternities in Visakhapatnam, India: A questionnaire-based survey.

Introduction: The pandemic caused by novel coronavirus (severe acute respiratory syndrome coronavirus 2) in Wuhan, China, in December 2019 is a highly contagious disease. The World Health Organization has declared the outbreak of coronavirus diseases (COVID-19) as a global public health emergency. Currently, the research on novel coronavirus is still in the primary stage.

Effect of different obturating techniques and sealers on the removal of filling materials during endodontic retreatment.

Background: Adequate removal of previous root filling materials is an important objective during endodontic retreatment.

Aim: This study was aimed to evaluate the influence of obturation quality and sealer type on the removal of root filling materials during endodontic retreatment using micro-computed tomography (μ-CT).

Materials And Methods: Ninety extracted mandibular premolars were randomly assigned to two groups ( = 45) based on the type of sealer (AH Plus and BioRoot RCS) and three sub-groups based on the obturating technique used, i.