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1. Altitude compensating ringed nozzle

Author

Ali Jraisheh, Jubajyoti Chutia, Abdessamad Benidar, Vinayak Kulkarni, Université de Damas = Damascus University, Indian Institute of Technology Guwahati (IIT Guwahati), Institut de Physique de Rennes (IPR), and Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS]Physics [physics], Supersonic nozzle, [SPI]Engineering Sciences [physics], Altitude compensating nozzle, Bleeding slots, Aerospace Engineering, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience; The increased focus on supersonic and hypersonic flows necessitates methods to study such flows in laboratory-based facilities, thus motivating researchers to find effective, efficient, and affordable methods to produce them in laboratories. It is desirable for the rocket nozzles to operate efficiently at different altitudes, which made the Altitude Compensating Nozzles emerge as a solution. In this work, we propose a new design for such nozzles, namely, the ringed nozzle. The proposed nozzle consists of a stack of parallel rings that serve as a nozzle with bleeding slots. This design can be utilised to obtain different exit Mach numbers and attain the desired performance according to the pressure ratio, serving as an Altitude Compensating Nozzle. The stack of rings might be altered to tailor nozzle shape and area ratio corresponding to the nozzle requirement. The nozzle is analysed from an engineering perspective by comparing the thrust coefficient and specific impulse, and the numerical simulations show promising results.

Published
2023
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2. Effectiveness of Three Agents in Pulpotomy Treatment of Permanent Molars with Incomplete Root Development: A Randomized Controlled Trial

Author

Ammar Eid, Davide Mancino, Mohammad Salem Rekab, Youssef Haikel, Naji Kharouf, Université de Damas = Damascus University, Biomatériaux et Bioingénierie (BB), Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), CHU Strasbourg, and univOAK, Archive ouverte

Subjects
[SDV.IB.BIO] Life Sciences [q-bio]/Bioengineering/Biomaterials, [SDV.MHEP] Life Sciences [q-bio]/Human health and pathology, Health Information Management, Leadership and Management, Health Policy, nano-hydroxyapatite, MM-MTA, Health Informatics, pulpotomy, permanent molars with incomplete root development, [SDV.IB.BIO]Life Sciences [q-bio]/Bioengineering/Biomaterials, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology
Abstract

The aim of this study was to investigate and compare, radiographically and clinically, the impacts of calcium-silicate based-cement (CSBC), nano-hydroxyapatite and platelet-rich fibrin (PRF) as pulpotomy agents in permanent immature molars with incomplete root development. Sixty-three participants (63 permanent immature molars) were included in this study. The patients were randomly divided into three equal groups. Fast setting MTA (MM-MTA), nano-hydroxyapatite and platelet-rich fibrin were used as pulpotomy agents. The teeth were evaluated clinically and radiographically after 6 and 12 months by two blinded examiners. Apical closure and pulp canal obliteration percentages were recorded. The in vitro reaction of the tested materials after a 7-day immersion period of the different materials in phosphate-buffered solution was analyzed using scanning electron microscopy to associate the in vitro mineralization with in vivo pulp canal obliteration percentages. Data were analyzed using Chi-square and ANOVA tests (α = 0.05). No significant difference was found between the three tested groups in terms of clinical and radiographic success (p > 0.05). All cases demonstrated evidence of root growth, including complete apical closure or continued apical closure. At 12 months, complete apical closure was found among the MM-MTA group (50%), nano-hydroxyapatite group (55%) and platelet-rich fibrin group (60%) (p > 0.05). After 12 months, pulp canal obliteration was more observed in the MM-MTA and nano-hydroxyapatite groups than in the PRF group (p < 0.05). MM-MTA (auto-mixed), NHA (hand-mixed) and PRF (autologous) could be used as pulpotomy agents since they exhibit comparable high clinical and radiographic success rates. However, the fact that the groups managed with MM-MTA and NHA have a higher tendency to canal obliteration might indicate that PRF should be considered the first choice material as pulpotomy agent, as it would make retreatment considerably easier. View Full-Text Keywords: pulpotomy; permanent molars with incomplete root development; MM-MTA; nano-hydroxyapatite

Published
2022
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3. Physicochemical and Mechanical Properties of Premixed Calcium Silicate and Resin Sealers

Author

Naji Kharouf, Salvatore Sauro, Ammar Eid, Jihed Zghal, Hamdi Jmal, Anta Seck, Valentina Macaluso, Frédéric Addiego, Francesco Inchingolo, Christine Affolter-Zbaraszczuk, Florent Meyer, Youssef Haikel, Davide Mancino, Biomatériaux et Bioingénierie (BB), Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Universidad Cardenal Herrera-CEU (CEU-UCH), Université de Damas = Damascus University, Laboratoire Energétique Mécanique Electromagnétisme (LEME), Université Paris Nanterre (UPN), Laboratoire des sciences de l'ingénieur, de l'informatique et de l'imagerie (ICube), École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Les Hôpitaux Universitaires de Strasbourg (HUS)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD), École Supérieure des Technologies et des Affaires (ESTA), Luxembourg Institute of Science and Technology (LIST), Università degli studi di Bari Aldo Moro = University of Bari Aldo Moro (UNIBA), Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Matériaux et nanosciences d'Alsace (FMNGE), Damascus University, and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE)

Subjects
Biomaterials, calcium silicate based sealer, resin sealer, mechanical properties, porosity, Sciences du Vivant [q-bio]/Ingénierie biomédicale, Biomedical Engineering, [SDV.IB.BIO]Life Sciences [q-bio]/Bioengineering/Biomaterials
Abstract

The aim of the present in vitro study was to evaluate specific mechanical and physicochemical properties of two calcium silicate based sealers, (AH Plus Bioceramic “AHPB”; Well-Root ST “WRST”), and a conventional resin sealer (AH Plus “AHP”). These aims were accomplished by assessing the porosity, pH, compression strength, roughness, wettability and cell attachment of the tested materials. The results were compared statistically using the one-way ANOVA test. Higher pH values were obtained in both AHPB and WRST compared to AHP at 3, 24 and 72 h (p < 0.05). A greater level of porosity and wettability was detected for both AHPB and WRST compared to the resin sealer AHP (p < 0.05). Evident cell growth characterized by elongated morphology was observed on the surface of AHPB and WRST, while only a thin layer of cells was seen on the surface of AHP. A significant lower compression strength and modulus were obtained in the specimens created using AHPB compared to those made with AHP and WRST (p < 0.05). The removal of calcium silicates may be quite tricky during endodontic retreatment. In conclusion, considering the limitations of the present in vitro study, both calcium silicate sealers demonstrated good physicochemical properties. However, the lower compression strength and modulus of AHPB may facilitate its removal and make the retreatment procedures considerably easier. Keywords: calcium silicate based sealer; resin sealer; mechanical properties; porosity

Published
2022
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4. Differentiation of COVID-19 signs and symptoms from allergic rhinitis and common cold: An ARIA-EAACI-GA

Author

Jere Reijula, De Yun Wang, Ralph Mösges, Tomohisa Iinuma, Jean Luc Fauquert, Nelson Rosario, Yehia El-Gamal, René Maximiliano Gómez, Tari Haahtela, Vincenzo Patella, Lorenzo Cecchi, Petr Panzner, Yoshitaka Okamoto, Oliver Pfaar, Luis Caraballo, Paulo Augusto Moreira Camargos, Filip Raciborski, Florin Mihaltan, Ken Ohta, Brian J. Lipworth, Kimi Okubo, Juan Carlos Ivancevich, Fulvio Braido, Ioana Agache, Frederico S. Regateiro, Neven Miculinic, Tuula Vasankari, R. Emuzyte, Arunas Valiulis, Yousser Mohammad, Torsten Zuberbier, Osman M. Yusuf, Ewa Jassem, Cezmi A. Akdis, Jean Bousquet, Alessandro Fiocchi, Jan Hagemann, Claus Bachert, Davor Plavec, K. S. Bennoor, Marek Jutel, Désirée Larenas-Linnemann, Stephen Montefort, Stefano Del Giacco, Przemyslaw Kardas, Erkka Valovirta, Mark S. Dykewicz, Antonio Valero, Wienczyslawa Czarlewski, Thomas B. Casale, Gabrielle L. Onorato, Omer Kalayci, Ludger Klimek, Joaquin Sastre, João Fonseca, Siân Williams, Karl Christian Bergmann, Marek Niedoszytko, Bilun Gemicioglu, Mario E. Zernotti, Musa Khaitov, H. Neffen, Robert M. Naclerio, Joaquim Mullol, Ana Pereira, Piotr Kuna, Michael Makris, Maria Teresa Ventura, Ioanna Tsiligianni, Dirceu Solé, Arzu Yorgancioglu, Charlotte Suppli-Ulrik, M. Gotua, Emmanuel P. Prokopakis, Dana Wallace, Jorge Maspero, Wytske Fokkens, Eckard Hamelmann, Antonino Romano, Dejan Dokic, Todor A. Popov, Violeta Kvedariene, Derek K. Chu, Anna Bedbrook, Dermot Ryan, Motohiro Ebisawa, Tomas Chivato, Giovanni Passalacqua, Menachem Rottem, Mário Morais-Almeida, Victoria Cardona, Bolesław Samoliński, Cristiana Stellato, Nikolaos G. Papadopoulos, Milan Sova, Jaime Correia-de-Sousa, Sietze Reitsma, Cemal Cingi, Francesca Puggioni, Robyn E O'Hehir, HUS Inflammation Center, Department of Dermatology, Allergology and Venereology, HUS Internal Medicine and Rehabilitation, Department of Public Health, Clinicum, Keuhkosairauksien yksikkö, Helsinki University Hospital Area, University of Helsinki, University Medical Center of the Johannes Gutenberg-University Mainz, Contre les MAladies Chroniques pour un VIeillissement Actif en Languedoc-Roussillon (MACVIA-LR), Université Montpellier 1 (UM1)-Centre Hospitalier Régional Universitaire [Montpellier] (CHRU Montpellier)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre Hospitalier Universitaire de Nîmes (CHU Nîmes)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-European Innovation Partnership on Active and Healthy Ageing Reference Site (EIP on AHA), Commission Européenne-Commission Européenne-Organisation Mondiale de la Santé / World Health Organization Office (OMS / WHO), University of Wrocław [Poland] (UWr), Swiss Institute of Allergy and Asthma Research (SIAF), Universität Zürich [Zürich] = University of Zurich (UZH), Transilvania University of Brasov, Humboldt University Of Berlin, Medical Consulting Czarlewski, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Centro de Investigación Biomédica en Red Enfermedades Respiratorias (CIBERES), MASK-air, Ghent University Hospital, Sun Yat-Sen University [Guangzhou] (SYSU), Karolinska Institutet [Stockholm], National Institute of Diseases of the Chest and Hospital (NIDCH), Charité - UniversitätsMedizin = Charité - University Hospital [Berlin], Ospedale Policlinico San Martino [Genoa], Universidade Federal de Minas Gerais = Federal University of Minas Gerais [Belo Horizonte, Brazil] (UFMG), University of Cartagena, Foundation for the Development of Medical and Biological Sciences (FUNDEMEB), Vall d'Hebron University Hospital [Barcelona], Allergy Unit [Malaga, Spain] (National Network ARADyAL), Hospital Regional Universitario de Málaga = Regional University Hospital of Malaga [Spain], University of South Florida [Tampa] (USF), Azienda Usl Toscana centro [Firenze], CEU-San Pablo University and HM-Hospitals School of Medicine, McMaster University [Hamilton, Ontario], Eskisehir Osmangazi University, Universidade do Minho = University of Minho [Braga], Life and Health Sciences Research Institute [Braga] (ICVS), University of Minho [Braga], The International Primary Care Respiratory Group (IPCRG), Università degli Studi di Cagliari = University of Cagliari (UniCa), Sts. Cyril and Methodius University, Saint Louis University School of Medicine [St Louis], Sagamihara National Hospital [Kanagawa, Japan], Ain Shams University (ASU), Vilnius University [Vilnius], Service de Pédiatrie Générale [CHU Clermont-Ferrand], CHU Estaing [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Bambino Gesù Children’s Hospital [Rome, Italy], Academic Medical Center - Academisch Medisch Centrum [Amsterdam] (AMC), University of Amsterdam [Amsterdam] (UvA), European Forum for Research and Education in Allergy and Airway Diseases (EUFOREA), Center of Research in Health Technologies and Information Systems (CINTESIS), Universidade do Porto = University of Porto, CUF Porto Hospital, Cerrahpasa Faculty of Medicine, Istanbul University, ALAS Medical Institute, Center for Allergy and Immunology Research [Tbilisi], Helsingin yliopisto = Helsingfors universitet = University of Helsinki, Universität Bielefeld = Bielefeld University, Chiba University Hospital, Servicio de Alergia e ImmunologiaBuenos Aires (Clinica Santa Isabel), Medical University of Gdańsk, Faculty of Medicine [Hacettepe University], Hacettepe University = Hacettepe Üniversitesi, Medical University of Łódź (MUL), Federal Medicobiological Agency [Moscow, Russian Federation], Hospital Medica Sur [Mexico City, Mexico], Ninewells Hospital and Medical School [Dundee], University General Hospital ' Attikon ' [Athens, Greece], Argentine Association of Allergy and Immunology, Marius Nasta Institute of Pneumology, Tishreen University, Université de Damas = Damascus University, University of Malta [Malta], Hospital CUF Descobertas, Clinical Research International Ltd [Hamburg, Germany] (CRI), Johns Hopkins University School of Medicine [Baltimore], Nemours/Alfred I. du Pont Hospital for Children, Monash University [Melbourne], Tokyo National Hospital, Nippon Medical School [Tokyo, Japon], Medicine Charles University and General Faculty Hospital in Prague, Royal Manchester Children's Hospital, University of Manchester [Manchester], Università degli studi di Genova = University of Genoa (UniGe), 'Santa Maria della Speranza' Hospital, Philipps Universität Marburg = Philipps University of Marburg, J.J. Strossmayer University of Osijek, Children’s Hospital Srebrnjak [Zagreb, Croatia], St. Ivan Rilski University Hospital, University of Crete [Heraklion] (UOC), IRCCS Humanitas [Rozzano, Italy], Medical University of Warsaw - Poland, Centro Hospitalar e Universitário [Coimbra], Amsterdam UMC - Amsterdam University Medical Center, Istituto di Ricovero e Cura a Carattere Scientifico [Troina, Italy] (IRCCS), Oasi Maria Santissima Srl [Troina, Italy], Clinica G.B. Morgagni (Fondazione Mediterranea), Pontifical Catholic University of Paraná (PUCPR), Pontifícia Universidade Católica do Paraná (PUCPR), Ha’Emek Medical Center [Afula, Israel], Pediatric Endocrine Institute [Afula, Israel], Usher Institute of Population Health Sciences and Informatics [Edinburgh, U.K.], University of Edinburgh, Federal University of Sao Paulo (Unifesp), University Hospital Olomouc [Czech Republic], University of Salerno (UNISA), Copenhagen University Hospital, Universitat de Barcelona (UB), European Academy of Paediatrics (EAP/UEMS-SP), University of Turku, Suomen Terveystalo Allergy Clinic, Finnish Lung Health Association, Università degli studi di Bari Aldo Moro = University of Bari Aldo Moro (UNIBA), Nova Southeastern University (NSU), Yong Loo Lin School of Medicine [Singapore], Department of Biology, Faculty of Sciences & Liberal Arts, Celal Bayar University, Manisa Celal Bayar University, The Allergy & Asthma Institute, Pakistan (IPCRG), Universidad Nacional de Villa María, Centre Hospitalier Régional Universitaire [Montpellier] (CHRU Montpellier), Allergiezentrum Wiesbaden, Salvy-Córdoba, Nathalie, Ear, Nose and Throat, and AII - Inflammatory diseases

Subjects
0301 basic medicine, Allergy, MESH: Asthma, Common Cold, allergic rhinitis, common cold, cough, COVID-19, smell, Consensus, Humans, SARS-CoV-2, Asthma, Rhinitis, Allergic, Disease, Care, 0302 clinical medicine, [SDV.MHEP.MI]Life Sciences [q-bio]/Human health and pathology/Infectious diseases, Immunology and Allergy, MESH: COVID-19, Rhinitis, [SDV.MHEP.ME] Life Sciences [q-bio]/Human health and pathology/Emerging diseases, [SDV.MHEP.ME]Life Sciences [q-bio]/Human health and pathology/Emerging diseases, Common cold, 3. Good health, MESH: Rhinitis, Allergic, [SDV.MHEP.MI] Life Sciences [q-bio]/Human health and pathology/Infectious diseases, Original Article, medicine.symptom, medicine.medical_specialty, Coronavirus disease 2019 (COVID-19), Immunology, Signs and symptoms, Asymptomatic, 03 medical and health sciences, Allergic, COVID‐19, Internal medicine, medicine, MESH: SARS-CoV-2, MESH: Consensus, MESH: Humans, business.industry, Rhinitis, Sinusitis, and Upper Airway Disease, CARE, medicine.disease, 030104 developmental biology, 030228 respiratory system, [SDV.SPEE] Life Sciences [q-bio]/Santé publique et épidémiologie, 3121 General medicine, internal medicine and other clinical medicine, [SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie, ORIGINAL ARTICLES, Airway, business, MESH: Common Cold
Abstract

Background Although there are many asymptomatic patients, one of the problems of COVID-19 is early recognition of the disease. COVID-19 symptoms are polymorphic and may include upper respiratory symptoms. However, COVID-19 symptoms may be mistaken with the common cold or allergic rhinitis. An ARIA-EAACI study group attempted to differentiate upper respiratory symptoms between the three diseases. Methods A modified Delphi process was used. The ARIA members who were seeing COVID-19 patients were asked to fill in a questionnaire on the upper airway symptoms of COVID-19, common cold and allergic rhinitis. Results Among the 192 ARIA members who were invited to respond to the questionnaire, 89 responded and 87 questionnaires were analysed. The consensus was then reported. A two-way ANOVA revealed significant differences in the symptom intensity between the three diseases (p < .001). Conclusions This modified Delphi approach enabled the differentiation of upper respiratory symptoms between COVID-19, the common cold and allergic rhinitis. An electronic algorithm will be devised using the questionnaire.

Published
2021
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5. Physicochemical and antibacterial properties of novel, premixed calcium silicate-based sealer compared to powder-liquid bioceramic sealer

Author

Ammar Eid, Salvatore Sauro, Youri Arntz, Youssef Haikel, Jihed Zghal, Naji Kharouf, Davide Mancino, Producción Científica UCH 2020, UCH. Departamento de Odontología, Biomatériaux et Bioingénierie (BB), Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Damas = Damascus University, Laboratoire des sciences de l'ingénieur, de l'informatique et de l'imagerie (ICube), École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Les Hôpitaux Universitaires de Strasbourg (HUS)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Energétique Mécanique Electromagnétisme (LEME), Université Paris Nanterre (UPN), Facultad de Ciencias de la Salud [Salta], Universidad Nacional de Salta (UNSA), I.M. Sechenov First Moscow State Medical University [Moscow, Russia] (MSMU), Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), univOAK, Archive ouverte, Damascus University, and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE)

Subjects
bioceramic sealer, lcsh:Medicine, physicochemical properties, 02 engineering and technology, Bioceramic, Sciences du Vivant [q-bio]/Médecine humaine et pathologie, Article, Materiales dentales - Propiedades, Dientes - Cavidades - Preparación, Contact angle, 03 medical and health sciences, chemistry.chemical_compound, Teeth - Roots - Planing, 0302 clinical medicine, antibacterial activity, Medicine, Solubility, Odontología restauradora, [SDV.MHEP] Life Sciences [q-bio]/Human health and pathology, business.industry, lcsh:R, calcium-silicate-based materials, filling ability, 030206 dentistry, General Medicine, Gums and resins in Dentistry, 021001 nanoscience & nanotechnology, Microstructure, 6. Clean water, Dental materials - Properties, Compressive strength, chemistry, Distilled water, Calcium silicate, 0210 nano-technology, business, Antibacterial activity, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology, Gomas y resinas - Aplicaciones en Odontología, Dentistry, Operative, Nuclear chemistry
Abstract

The aim of this study was to compare the physicochemical properties, filling ability, and antibacterial activity of a premixed calcium silicate-based sealer to those of a powder&ndash, liquid bioceramic sealer. Ceraseal (CS) and BioRoot (BR) materials were analyzed using scanning electron microscopy and energy-dispersive X-ray spectroscopy at 7 and 14 d of immersion in distilled water. The filling ability of the two sealers as well as the water contact angle, solubility, flow, roughness, crystalline microstructure, pH, and compressive strength were also evaluated. The antibacterial activity was assessed through an agar diffusion as well as through direct tests. All the results were statistically analyzed using one-way or two-way analysis of variance tests. Statistically significant lower void percentages were observed for CS at 2 and 8 mm from the working length (WL) compared to those for the BR group, whilst no significant difference was observed at 5 mm from the WL. BR sealer showed higher alkaline pH, rougher surface, lower water contact angle values, lower flowability, and higher solubility compared to CS. BR showed globular and needle-like crystalline microstructure, whilst CS had globular and flower-like crystalline microstructure up to 72 h. No statistical difference was found for the compressive strength between the two sealers. BR and CS showed no antibacterial effect against Enterococcus faecalis after 3 h, whilst both sealers showed antibacterial capacity after 24 and 72 h. BR demonstrated higher antibacterial activity after 24 h. In conclusion, the use of bioceramic sealers may play an important role in controlling bacterial growth. Moreover, CS may have superior filling ability and lower solubility than the BioRoot sealer due to its specific chemical composition and mixing method.

Published
2020
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6. Effectiveness of Etching by Three Acids on the Morphological and Chemical Features of Dentin Tissue

Author

Naji Kharouf, Davide Mancino, Youssef Haikel, Asâd Naji-Amrani, Ammar Eid, Joseph Hemmerlé, Biomatériaux et Bioingénierie (BB), Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Damascus University, univOAK, Archive ouverte, Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Université de Damas = Damascus University

Subjects
[SDV.BIO]Life Sciences [q-bio]/Biotechnology, Scanning electron microscope, Surface Properties, Smear layer, 03 medical and health sciences, chemistry.chemical_compound, 0302 clinical medicine, stomatognathic system, Acid Etching, Dental, Dentin, medicine, Phosphoric acid Polyacrylic acid, Humans, Phosphoric Acids, General Dentistry, Dissolution, Phosphoric acid, Dentin demineralization, Polyacrylic acid, Dental Bonding, 030206 dentistry, [SDV.BIO] Life Sciences [q-bio]/Biotechnology, Demineralization, stomatognathic diseases, medicine.anatomical_structure, chemistry, 030220 oncology & carcinogenesis, Dentin-Bonding Agents, Smear Layer, Microscopy, Electron, Scanning, Pulp (tooth), Nuclear chemistry
Abstract

Aim The purpose of this study was to evaluate the microscopic and chemical effects of phosphoric acid gel, phosphoric acid liquid, and polyacrylic acid application for 15 seconds (s) on coronal dentin. Materials and methods Twelve extracted teeth were selected. Three etching acids were used to prepare the dentin surfaces. Scanning electron microscopy (SEM) and X-ray energy dispersive spectroscopy (EDX) were used to analyze the chemical and morphological changes of the dentinal surfaces, including the depth of demineralization. Collected data were statistically analyzed by the one-way analysis of variance test. Results Dentin etched with phosphoric acid gel or liquid showed greater peritubular dentin dissolution, including complete removal of the smear layer. In addition, there were many silica particles on the dentin etched by phosphoric acid gel 37%. The dentin that was etched with 25% polyacrylic acid for 15 seconds showed no smear layer removal. Chemical analysis (EDX) showed that dental surfaces etched with phosphoric acid liquid 37% for 15 seconds showed the strongest mineral dissolution at the calcium surface, with a calcium content of 5.25%. On the other hand, EDX analysis of the dental surface etched with 25% polyacrylic acid showed more surface enrichment in calcium (17.19%). Conclusion Although phosphoric acid (gel or liquid) 37% cleans the dental surface, phosphoric acid gel precipitates silica particles on the etched dentin surface. These particles cannot be removed by rinsing off this acid. The application of polyacrylic acid for 15 seconds does not noticeably demineralized dentin, nor remove the smear layer. Clinical significance The clinician should use phosphoric acid (gel or liquid) to clean dental surfaces to prepare them for the bonding process. The low demineralizing effects of the polyacrylic acid permits its use near the pulp.

Published
2019

7. Does Adhesive Layer Thickness and Tag Length Influence Short/Long-Term Bond Strength of Universal Adhesive Systems? An In-Vitro Study

Author

Salvatore Sauro, Nairy Sekayan, Jihed Zghal, Youssef Haikel, Louis Hardan, Tarek Ashi, Ammar Eid, Rim Bourgi, Naji Kharouf, Davide Mancino, Levi Maguina, UCH. Departamento de Odontología, Producción Científica UCH 2021, Biomatériaux et Bioingénierie (BB), Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Damas = Damascus University, Laboratoire des sciences de l'ingénieur, de l'informatique et de l'imagerie (ICube), École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Les Hôpitaux Universitaires de Strasbourg (HUS)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Energétique Mécanique Electromagnétisme (LEME), Université Paris Nanterre (UPN), Loma Linda University, Université Saint-Joseph de Beyrouth (USJ), Universidad Cardenal Herrera-CEU (CEU-UCH), I.M. Sechenov First Moscow State Medical University (Sechenov University), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Damascus University, Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Saint Joseph University [Beirut, Lebanon] (SJU), Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Matériaux et nanosciences d'Alsace (FMNGE), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE)

Subjects
Molar, [SDV.BIO]Life Sciences [q-bio]/Biotechnology, Materials science, Scanning electron microscope, dentin bonding, 02 engineering and technology, shear bond strength, lcsh:Technology, Materiales dentales - Propiedades, lcsh:Chemistry, 03 medical and health sciences, 0302 clinical medicine, stomatognathic system, Dentin, medicine, In vitro study, General Materials Science, Composite material, lcsh:QH301-705.5, Dentina, Instrumentation, Dental adhesives - Properties, Fluid Flow and Transfer Processes, lcsh:T, Bond strength, Process Chemistry and Technology, General Engineering, Anova test, Sciences du Vivant [q-bio]/Biotechnologies, 030206 dentistry, 021001 nanoscience & nanotechnology, self-etch, Layer thickness, lcsh:QC1-999, Dental materials - Properties, Computer Science Applications, medicine.anatomical_structure, lcsh:Biology (General), lcsh:QD1-999, lcsh:TA1-2040, layer thickness, Adhesive, universal adhesives, lcsh:Engineering (General). Civil engineering (General), Adhesivos dentales - Propiedades, 0210 nano-technology, lcsh:Physics
Abstract

(1) Background: This study investigated the effect of the adhesive layer thickness and the length of resin tags on dentin bond strength of five universal adhesives applied in self-etch mode. (2) Methods: One hundred and fifty extracted human third molars were used. Five different universal adhesives were applied in self-etch mode on the dentin surface. Half of the specimens were subjected to an aging procedure for six months. A shear bond strength (SBS) test was performed and the results were statistically analyzed with a t-test and one-way ANOVA test. Scanning electron microscopy (SEM) was executed to measure the adhesive layer thickness and tag depth. (3) Results: No statistical differences were found between the five adhesive systems after a 24 h storage period, regardless of layer thickness and tag depth (p &lt, 0.05). After 6 months of aging in water at 37 °C, Iperbond Max and Scotchbond Universal preserved the bond strength over time (p &lt, 0.05), whilst the SBS of Iperbond Ultra, FuturaBond M+, and Ibond Universal decreased significantly after the aging period. No relation was observed between the adhesive thickness or tags’ length on SBS. (4) Conclusions: Within the limitation of this study, the stability over time of the bond strength of universal adhesives depends on their compositions regardless of the adhesive layer thickness and/or tags’ length.

Published
2021
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8. Flexible Rollback Recovery in Dynamic Heterogeneous Grid Computing

Author

Samir Jafar, Thierry Gautier, Axel Krings, Faculté des Sciences [Damascus], Damascus University, Department of Computer Science [Idaho], University of Idaho [Moscow, USA], PrograMming and scheduling design fOr Applications in Interactive Simulation (MOAIS), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire d'Informatique de Grenoble (LIG), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF), Grid'5000, Laboratoire d'Informatique de Grenoble (LIG), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), Université de Damas = Damascus University, and Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Computer science, Dataflow, Distributed computing, Node (networking), Reliability (computer networking), [INFO.INFO-OH]Computer Science [cs]/Other [cs.OH], 020206 networking & telecommunications, 020207 software engineering, Fault tolerance, 02 engineering and technology, computer.software_genre, Grid, Subnet, Grid computing, 0202 electrical engineering, electronic engineering, information engineering, Overhead (computing), Electrical and Electronic Engineering, computer, ComputingMilieux_MISCELLANEOUS
Abstract

Large applications executing on Grid or cluster architectures consisting of hundreds or thousands of computational nodes create problems with respect to reliability. The source of the problems are node failures and the need for dynamic configuration over extensive run-time. This paper presents two fault-tolerance mechanisms called theft induced checkpointing and systematic event logging. These are transparent protocols capable of overcoming problems associated with both, benign faults, i.e., crash faults, and node or subnet volatility. Specifically, the protocols base the state of the execution on a dataflow graph, allowing for efficient recovery in dynamic heterogeneous systems as well as multi-threaded applications. By allowing recovery even under different numbers of processors, the approaches are especially suitable for applications with need for adaptive or reactionary configuration control. The low-cost protocols offer the capability of controlling or bounding the overhead. A formal cost model is presented, followed by an experimental evaluation. It is shown that the overhead of the protocol is very small and the maximum work lost by a crashed process is small and bounded.

Published
2009
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