Dental Casting
Mostrando 1-12 de 27 artigos, teses e dissertações.
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1. A new portable vibrator for plaster pouring: effect on the marginal fit at cylinder-abutment
OBJECTIVE: The aim of this study was to test a new portable vibrator for plaster pouring (developed for this purpose), comparing the effect of its use on the accuracy of working cast of implant-supported restorations to the conventional vibrator. MATERIAL AND METHODS: From a master cast with 2 implants, 30 transfer moldings were made randomly and divided int
J. Appl. Oral Sci.. Publicado em: 2012-10
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2. Influence of the casting material on the dimensional accuracy of dental dies
The purpose of this study was to evaluate the dimensional accuracy of different materials used in the confection of dies. Two stainless steel standard models were confected. One of the models, which was 2 mm larger than the other model, was used to provide a uniform relief for the two-step putty-wash impression technique. Thirty impressions were obtained usi
Brazilian Oral Research. Publicado em: 17/06/2011
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3. Evaluation of abutment and perimplantar region deformation of implant-supported screwed prostheses: an study using strain gauges / Avaliação da deformação do intermediário e região perimplantar de próteses implanto-suportada unitárias parafusada: estudo através da extensometria
The dental implant depends on the supporting bone for its stability and functional longevity. Mechanical behavior and trabecular bone structure affect the interface with the implant. Such knowledge may provide a basis for improvements in the current implant function and design, decreasing bone crest resorption and failure at bone-implant junction. Adequate q
Publicado em: 2010
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4. Desajuste marginal e influencia na pre-carga de parafusos e nas tensões induzidas as fixações de pilares metaloplasticos sobre-fundidos / Marginal misfit and influence in the pre-load and the stress-induced setting of the metaloplastic abutments
Castable UCLA abutments are of wide applicability in dental implants, because they allow the manipulation in the laboratory at low cost and individualization of abutments for each patient. However, they show the worse results of marginal adaptation then the fabricated, although these aggregate costs significantly higher. UCLA premachined abutments for castin
Publicado em: 2010
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5. The electrochemical properties of four dental casting suprastructure alloys coupled with titanium implants
OBJECTIVES: As the choice of suprastructure alloy to be combined with titanium for the oral cavity is still a much debated issue, the aim of this study was to investigate the electrochemical interaction of the suprastructure/implant couples under the determined experiment conditions. MATERIAL AND METHODS: The potentiodynamic polarization curves and open-circ
Journal of Applied Oral Science. Publicado em: 2009-10
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6. Avaliação comparativa de propriedades geradas pelos processos de soldagem TIG e brasagem em uma liga odontológica à base de Ni-Cr / Comparative assessment of properties generated by the process of TIG welding and brazing in a Ni-Cr dental alloy
The purpose of this study was to compare, by means of microhardness testing and metallurgical characterization techniques as metallography, optical microscopy, scanning electron microscopy (SEM) and energy dispersion spectroscopy (EDS), mechanical and metallurgical properties of welded joints by TIG and brazing methods in a dental alloy based on Ni-Cr (FIT-C
Publicado em: 2009
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7. Analysis of titanium casting s situation and of laser-weld joint s quality made in Ti cp and Ti-6AI-4V structures / Estudo da qualidade da fundição do titanio comercialmente puro e da união soldada a laser em estruturas de Ti cp e em liga de Ti-6AI-4V
O objetivo desse estudo foi: 1) Examinar por meio de radiografias, a incidência de porosidade interna em estruturas fundidas em titânio comercialmente puro, com diferentes diâmetros de secção transversal; 2) Analisar essa incidência em uniões soldadas a laser, com diferentes distâncias de soldagens, em espécimes de Ti cp e Ti-6Al-4V, variando o diâ
Publicado em: 2009
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8. Retenção de grampos cirucenferenciais associados a retentores intra-radiculares com encaixe era utilizados em overdentures parciais removíveis / Retention clips cirucenferenciais associated with CuAlZn with docking was used in removable partial overdentures
The overdentures can be defined as total or partial removable dentures that cover root or osseo integrated implants rehabilitating the whole dentition. The mechanical retention in the removable partial overdentures (RPOs) is obtained through the use of cast clasps and attachments. This biomechanical principle has a great importance, since is inwardly associa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/07/2008
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9. Análise mecânica e microestrutural das ligas de cobalto-cromo de uso odontológico após sucessivas refundições
The cobalt-chromium alloy is extensively used in the Odontology for the confection of metallic scaffolding in partial removable denture. During the last few years, it has been reported an increasing number of premature imperfections, with a few months of prosthesis use. The manufacture of these components is made in prosthetic laboratories and normally invol
Publicado em: 2008
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10. Análise in vitro do espaço interno de coroas metálicas em Tilite®, posterior a utilização de alívios sobre troquéis em gesso
O presente estudo tem como objetivo principal avaliar qual é o número de camadas de espaçadores de troquéis que apresenta o valor mais próximo da especificação número 8 da ADA (Associação Dentária Americana) para a espessura da camada do cimento de fosfato de zinco, utilizado durante a cimentação de uma coroa metálica total. Foi realizado um es
Publicado em: 2008
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11. Implant supported prosthesis : influence of abutment and porcelain firing cycles on misfit and stress around implants / Proteses fixas implanto-retidas : influencia do pilar intermediario e dos ciclos de cocção da ceramica nos desajustes e nas tensões induzidas as fixações
It is speculated that porcelain firing cycles cause an increase on marginal misfit. This effect is imagined to origin an increase on strains around implants, when screwing the metallic frameworks, and it is supposed to be decreased by the use of an abutment between the framework and the implant. Thus, the aim of this study was to evaluate the influence of th
Publicado em: 2008
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12. Characterization of ceramic powders used in the inCeram systems to fixed dental Prosthesis
InCeram (Vita Zahnfabrik- Germany) is known as a high strength ceramic being used for core crowns and for fixed partial denture frameworks. InCeram system consists of slip-casting technique which is used for to build the framework, which is then pre-sintered obtaining an open-pore microstructure. The material gains its strength by infiltration of the lanthan
Materials Research. Publicado em: 2007-03