FESEM evaluation of smear layer removal from conservatively shaped canals: laser activated irrigation (PIPS and SWEEPS) compared to sonic and passive ultrasonic activation-an ex vivo study.

Background: Irrigation of the pulp space is a mandatory step to get rid of all its organic and inorganic content. Activation of the irrigants play a key role in the era of minimally invasive endodontics. The aim of this study was to assess the effectiveness of different irrigants activation methods in removing the smear layer at 1, 3, 5 and 8 mm from the apex from conservatively shaped canals.

Clinical Reasoning: Adapting Teaching Methods During the COVID-19 Pandemic to Meet Student Learning Outcomes.

Background: The COVID-19 pandemic impacted all aspects of health care, including nursing education. Senior nursing students saw the elimination of in-person clinical opportunities in the final months prior to graduation as health care facilities restricted access to essential personnel in an effort to minimize transmission of the virus and conserve personal protective equipment.

Method: To fulfill course requirements, faculty created a COVID-19 assignment that implored students to research the most current infection control recommendations for COVID-19 and to describe the impacts of the virus on nursing care, patients, families, interdisciplinary collaboration, and public safety.

Basics of the magnetic resonance phenomenon.

Magnetic Resonance is increasing its importance as a diagnostic mean. For an effective and accurate MRI practice, new fundamental principles, which are at the basis of this phenomenon, must be acquired. In this chapter an extremely simplified overview of the physical basics of MRI is introduced, to help the readers understand the principles underlying this complex technique.

Intraarterial portography with gadopentetate dimeglumine: improved liver-to-lesion contrast in MR imaging.

Magnetic resonance imaging during arterial portography (MRAP) was performed by the authors in a selected group of 12 patients with hepatic lesions. A low dose of gadopentetate dimeglumine (4 mL of a 0.5-mol/L solution, corresponding to a dose of 0.