ETUDE DE L'ADHESION D'UNE RESINE COMPOSITE SUR LES TISSUS DURS DE LA DENT PDF Download
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Author: MARC.. PANIGHI
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Author: MARC.. PANIGHI
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Author: Xavier Carruggi
Publisher:
ISBN:
Category :
Languages : fr
Pages : 124
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Objectif : Le but de cette étude était de caractériser mécaniquement l'adhésion d'une résine composite sur une surface dentinaire préparée au laser Er:YAG, avec ou sans application d'un agent acide. Matériels et méthodes : 45 molaires humaines ont été incluses dans une résine transparente et coupées au niveau coronaire afin d'obtenir des surfaces de dentine parfaitement planes et polies. Elles ont été réparties en trois groupes : Groupe A : préparation de la surface à l'aide d'une fraise carbure de tungstène montée sur turbine sous spray d'eau et application d'acide orthophosphorique pendant 15 secondes. Goupe B : préparation de la surface à l'aide du laser Er:YAG sous spray d'eau (500 mJ/pulse, 10 Hz, fluence de 44,21 J/cm2). Groupe C : préparation de la surface à l'aide du laser Er:YAG sous spray d'eau et application d'acide orthophosphorique pendant 15 secondes. Des plots de composite ont été collés sur les surfaces ainsi préparées et un test de résistance au cisaillement a été appliqué. Résultats : Les contraintes de rupture en cisaillement étaient de 16,74 ± 6,24 dans le groupe A, 20,33 ± 4,76 dans le groupe B et 17,59 ± 5,96 dans le groupe C. La comparaison des moyennes par le test de Kruskal Wallis n'a pas mis en évidence de différence significative entre les trois types de traitement de la surface dentinaire (p=0,162). Le type de fracture observée était indépendant du type de traitement appliqué sur la surface dentinaire (p=0,648). Conclusion : Aucune différence n'a pu être mise en évidence entre le collage à une dentine préparée de manière classique au moyen d'une fraise en carbure de tungstène et le collage à une dentine préparée au moyen du laser Er:YAG. De plus, dans le cas du laser, l'application d'acide orthophosphorique au début de la procédure de collage n'a pas permis d'améliorer l'adhésion.
Author: Benoît Rossignol
Publisher:
ISBN:
Category :
Languages : fr
Pages : 106
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Author: Don Montague
Publisher: Taylor & Francis
ISBN: 9780419199106
Category : Architecture
Languages : en
Pages : 472
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Book Description
This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.
Author: Jean-Paul Kurtz
Publisher: Springer Science & Business Media
ISBN: 0306483173
Category : Technology & Engineering
Languages : en
Pages : 1520
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Book Description
I am pleased to present a work which marks a milestone in the history of public works and, more precisely, in that of permanent structures—a comprehensive dictionary of Civil Engineering terms. Since the beginning of time, Man has always tried to find a means to clear the obstacles which nature erected to displace him. With the first tree trunk thrown across a river, man sought to improve the crossing structure. After the invention of the wheel, and to satisfy his thirst for conquest (Roman ways), and comfort (aqueducts), man built bridges that became a preremptory necessity to move quickly. Thus, Man started to build wooden and masonry works. With the passing centuries, the builders became masters in the art of building masonry works. Then came the Industrial Revolution and the advent of the steel (1864), which was closely followed by the invention of the reinforced concrete (1855). The need for railways and improving the road network inspired great works of crossing such as viaducts and tunnels. The boom of the railway network and the development of the car required the construction of an increasing number of new structures. This phenomenon continues today with hundreds of structures built each year throughout the world.
Author: Garry Thomson
Publisher: Elsevier
ISBN: 1483102718
Category : Travel
Languages : en
Pages : 320
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Book Description
The Museum Environment, Second Edition deals with the behavior and conservation of the various classes of museum exhibit. This book is divided into six sections that provide museum specifications for conservation. This text highlights the three contributing factors in the deterioration and decay of museum exhibits, namely light, humidity, and air pollution. Each section describes the mechanism of deterioration and the appropriate “preventive conservation . The changes in this edition from the previous include the electronic hygrometry, fluorescent lamps, buffered cases, air conditioning systems, and data logging and control in historic buildings. This book is of great value to conservation researchers and museum workers.
Author: Thomas Nugent
Publisher:
ISBN:
Category :
Languages : en
Pages : 476
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Author: Peter Fischer
Publisher:
ISBN:
Category : Art
Languages : en
Pages : 160
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"In this book Peter Fischer traces the achievements of the artist-craftsman in mosaic, from the colored clay pegs arranged in patterns on the pillars of Uruk around 2500 BC up to the present day, discusses the architectural function, and illuminates the religious, social and scientific background which shaped the various forms of the mosaic."--Book jacket.
Author: Unesco. International Scientific Committee for the Drafting of a General History of Africa
Publisher: Univ of California Press
ISBN: 9780520067035
Category : History
Languages : en
Pages : 1076
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Book Description
The hardcover edition of volume 8 was published in 1994. This paperback edition is the eighth and final volume to be published in the UNESCO General History of Africa. Volume 8 examines the period from 1935 to the present, and details the role of African states in the Second World War and the rise of postwar Africa. This is one of the most important books in the entire series, and as such, it is an unabridged paperback.
Author: Edward Sacher
Publisher: World Scientific
ISBN: 9813225696
Category : Medical
Languages : en
Pages : 491
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Book Description
The contents of this book touch on the all major dental biomaterials: polymers, composites, ceramics and metals. The first part introduces the readers to the surface physicochemical and mechanical characterizations at the nanoscopic level, and the use of finite element analysis. The second part discusses dental adhesion, resin-based composites, polymerization contraction stress, impression materials and soft liners for total prosthesis. The third part deals with ceramics in restorative dentistry: zirconia and lithium disilicate, the fractography of dental ceramics, as well as bioglass for bone growth. The fourth part discusses the toxicity of mercury in dentistry, and the use of preventive materials for dental diseases. The concluding part identifies imminent techniques for dental biomaterials, such as additive manufacturing (3D printing), and bioprinting in dentistry.
