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Author: THOMAS.. KALTENMARK
Publisher:
ISBN:
Category :
Languages : fr
Pages : 146
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Author: THOMAS.. KALTENMARK
Publisher:
ISBN:
Category :
Languages : fr
Pages : 146
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Author: Patrick Exbrayat
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Author: Philippe Rocher (chirurgien-dentiste).)
Publisher:
ISBN:
Category :
Languages : fr
Pages : 226
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Les alliages nickel-titane (NiTi) sont de plus en plus utilisés dans le domaine biomédical ; en odontologie, particulièrement en orthodontie et en endodontie, mais aussi en chirurgie vasculaire. Ces alliages présentent des propriétés de mémoire de forme et de superélasticité. Leurs compositions sont proches d'un mélange équiatomique de Ni et de Ti. Cette quantité importante de Ni soulève des interrogations quant à leur résistance à la corrosion et à leur biocompatibilité. Pour répondre à ces interrogations, nous avons étudié la biocorrosion et les propriétés biologiques de 7 alliages. Les résultats obtenus pour l'alliage NiTi sont comparés à ceux du Ni, du Ti et des alliages Ti6Al4V, 316L, NiCrMo et PdAg. es évaluations électrochimiques ont consisté en un essai de potentiel/temps et une polarisation globale. Ces manipulations ont été reproduites dans 3 électrolytes : une salive artificielle, un milieu de culture et un milieu de culture additionné de cellules en suspension. vec trois lignées cellulaires différentes (cellules épithéliales, fibroblastiques et mésenchymateuses) nous avons déterminé les propriétés biologiques de ces alliages à l'aide de tests de proliférations cellulaires, de survies cellulaires, de réactions inflammatoires, de marquages histologiques et d'études morphologiques. Nous avons évalué l'énergie de surface de nos échantillons et les éléments libérés après immersion dans un milieu de culture. ll ressort de l'ensemble de ces tests qu'aussi bien au niveau électrochimique que biologique, l'alliage NiTi présente de bons résultats. Son comportement est proche de celui du Ti. La présence de Ni n'entraîne pas de diminution importantes des propriétés. Comparé aux autres alliages testés, l'alliage NiTi est un matériau de choix pour la confection d'arcs orthodontiques et d'instruments endodontiques.
Author: SYLVIE.. NORA
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Author: Jessica Duport
Publisher:
ISBN:
Category :
Languages : fr
Pages : 146
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Author: Gottfried Schmalz
Publisher: Springer
ISBN: 9783642096501
Category : Medical
Languages : en
Pages : 0
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Te question of whether and to what extent dental ma- efects). To ensure the readability of each individual terials may be hazardous to patients, the environment, chapter, some aspects are approached from diferent and dental personnel has become of increasing public scopes, and some topics are thus mentioned in more concern. Te very emotional discussion in the public than one chapter, although with diferent approaches. media about amalgam has signifcantly contributed Te editors are grateful to the publisher for p- to this dispute. In addition, reports about potential viding the possibility of including a great number of health risks in relation to other dental materials, such colourful illustrations and clinical pictures. To f- ur as resins and dental alloys, have generated an increased ther enhance the readability of the book Key Notes public and professional interest in this topic. One con- and Clinical Practice Advices have been highlighted sequence of this tendency is that dental materials are all through the texts, and at the end of each chapter a now the subject of special regulations and directives in comprehensive summary of key points have been - almost all countries of the world, intended to guarantee derlined in Conclusions for the Dental Practitioner. efciency, safety, and quality and to make sure that only Te guiding theme of all parts of the book was to biocompatible materials are brought on the market.
Author: Philippe Jacques Marcel Blaise
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Author: Jack D. Preston
Publisher: Quintessence Publishing (IL)
ISBN:
Category : Medical
Languages : en
Pages : 484
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Author: Agnes Buka
Publisher: World Scientific
ISBN: 1848167997
Category : Science
Languages : en
Pages : 299
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The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Author: Armour Research Foundation (U.S.)
Publisher:
ISBN:
Category : Materials
Languages : en
Pages : 434
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