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Expression of beam hardening artifacts on horizontally stitched cone-beam computed tomography images.
Imaging Sci Dent
December 2024
Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil.
Purpose: This study was performed to evaluate the expression of beam hardening artifacts generated by high atomic number materials in stitched cone-beam computed tomography (CBCT) images, compared to the traditional acquisition mode.
Materials And Methods: CBCT volumes were acquired using an acrylic resin phantom embedded with pairs of cylinders made from amalgam dental alloy, cobalt-chromium alloy, gutta-percha, titanium, and zirconium. These cylinders were placed within the overlapping zones of the stitching reconstruction area.
Identifying the sources of mercury exposure in dental workers.
Occup Med (Lond)
December 2024
Faculty of Medicine, Department of Preventive and Social Medicine, Chulalongkorn University, Bangkok 10330, Thailand.
Dental professionals who handle dental amalgam are at risk of mercury exposure, though the prevalence and severity of elevated mercury levels from non-occupational sources are not well characterized. We report two dental workers who had elevated urinary mercury levels (37 and 25.6 mcg/L) during routine health screenings.
View Article and Find Full Text PDFRoot-filling materials for endodontic surgery: biological and clinical aspects.
Biomater Investig Dent
October 2024
Section of Endodontics, Institute of Clinical Dentistry, Faculty of Dentistry, University of Oslo, Oslo, Norway.
The placement of root filling materials aims to prevent the occurrence of post-treatment apical periodontitis following completion of endodontic treatment. Materials should possess properties that will not permit bacterial invasion and infection, namely excellent sealing ability and/or antibacterial properties. In root-end filling procedures or repair of root perforations, the root filling materials are placed in a particularly challenging clinical environment, as they interface with a relatively large area with the periradicular tissues.
View Article and Find Full Text PDFObjectives: To compare trends in teaching and placement of composite resin versus amalgam in posterior restorations in Canadian dental schools with those in the United States.
Methods: Secondary descriptive and statistical analyses were performed on data from 2 previous studies. The data consisted of responses to questionnaires on teaching policies and the proportion of posterior restorations (amalgam and composite resin) performed in Canadian and US dental schools.
Teaching posterior composite restorations: A survey of dental schools in Palestine.
Heliyon
October 2024
Faculty of Dentistry, Arab American University, Palestine.
Aim: This study aimed to assess different aspects of teaching posterior composite restorations in two dental schools in Palestine.
Materials And Methods: A questionnaire was emailed to the heads of the operative and conservative dentistry departments to collect detailed information on the teaching practices related to posterior composite restorations. The questionnaire comprised 22 questions structured to collect information on the time dedicated to teaching the topic, competency assessments, future plans for allocating time for each restoration type, relevant indications and contraindications, specific materials and techniques utilized in the application, and fees charged for posterior restorations.
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