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Influence of build direction, post-polymerization time, and aging on the fracture resistance and marginal and internal discrepancies of three-dimensional printed provisional crowns.
Odontology
September 2024
Department of Dentistry, Federal University of Rio Grande do Norte (UFRN), Av. Salgado Filho, 1787, Lagoa Nova, Natal, RN, CEP: 59056-000, Brazil.
Article Synopsis
- The study aimed to assess how build direction, post-polymerization time, and aging affect the fracture resistance and quality of 3D printed provisional crowns created with an LCD technique.
- One hundred and eighty crowns were printed at two angles (30° and 90°) and post-polymerized for varying times, then aged in water to analyze their marginal discrepancies and overall strength.
- Results revealed that all tested factors significantly impacted marginal and internal discrepancies, with better outcomes in crowns printed at 30° and specific post-polymerization times leading to higher fracture resistance and smoother margins.
Atlas-guided brain projection tracts: From regions of interest to tractography 3D rendering.
J Anat
August 2024
Laboratoire CREATIS, CNRS UMR5220, Inserm U1206, INSA-Lyon, Université de Lyon I, Lyon, France.
Article Synopsis
- - The study focuses on improving diffusion tensor imaging (DTI) for better visualization of projection tracts in the brain, which are crucial for surgical planning, as current methods struggle to differentiate these pathways.
- - Researchers developed a specialized atlas of regions of interest (ROIs) tailored for projection tracts tractography, involving 49 healthy subjects and advanced imaging techniques to ensure accurate data collection.
- - The study successfully outlines specific ROI coordinates for various projection tracts, enhancing the capability to differentiate and analyze these pathways at the spinal cord level, which may aid in clinical applications.
Novel technologies for producing tridimensional cellulosic materials for packaging: A review.
Carbohydr Polym
October 2024
University Grenoble Alpes, CNRS, Grenoble INP, LGP2, 38000 Grenoble, France; Institut Universitaire de France (IUF), 75000 Paris, France. Electronic address:
Petroleum-based packaging have been developed during the last century to transport and protect many products, regardless of the field of applications (food, electronics, cosmetics, leisure, etc.). Such protection has been very useful for the development of our society by favoring economic growth, limiting food waste and product deterioration, and consequently avoiding strong environmental impacts.
View Article and Find Full Text PDFA Fluorescence-based Method to Reaccess Root Canals in Endodontically Treated Teeth: A Micro-Computed Tomography Tridimensional Assessment.
J Endod
October 2024
Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil. Electronic address:
Introduction: The aim of this study was to evaluate the volume of dentin removal and the volume of remnants of restorative material after the removal of an esthetic restorative coronal set and cervical barrier in endodontically treated mandibular molars with the aid of different magnification methods using 3-dimensional (3D) micro-computed tomographic (micro-CT) morphometric analysis.
Methods: A sample of 30 mandibular first molars (N = 30) was used. All teeth were endodontically treated, and the specimens were initially scanned using micro-CT imaging and reconstructed.
Large-area, highly uniform microwave field radiation and efficient excitation of fluorescence are the key to achieving high sensitivity sensing of the NV (nitrogen-vacancy) magnetometer. In this paper, we report a compact multipass-laser-beam antenna for NV ensemble color centers sensing. The antenna not only provides a tridimensional uniform magnetic field, but also can be used for efficient excitation of the NV fluorescence.
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