Crowns Dentistry
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Evaluation of the effect of the bleaching agent and the subsequent application of sodium fluoride on intra-coronal dentine microhardness / Avaliação do efeito do agente clareador e da subseqüente aplicação de fluoreto de sódio na microdureza da dentina intracoronária
The aim of the present study was to evaluate the microhardness of intra-coronal dentine submitted to bleaching with 38% hydrogen peroxide, photo-activated with LED-Laser and followed by the application of 2% sodium fluoride gel or 5% varnish. Crowns of 45 human maxillary canines were sectioned in the buccal-lingual direction and a sample of 25 mm of internal
Publicado em: 2009
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2. The use of infrared thermographic imaging for pulp vitality evaluation in vivo / Ensaio sobre o uso da termografia infravermelha na avaliação da vitalidade pulpar in vivo
Nowadays, it is known that the determination of the pulp vitality testing only its nerve sensorial response through thermal or electrical tests is discussable because those procedures are not sufficiently sensitive to determine the degree of pulp involvement. Besides the vitality of the pulp does not only depend on its nerve condition, but on its blood suppl
Publicado em: 2008
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3. In vitro evaluation of the resistance to traction of different fiber-glass posts used in two protocols for fragile root rehabilitation, with or without composite resin reinforcement / Avaliação, in vitro, da resistência à tração de diferentes pinos de fibra de vidro utilizados em dois protocolos para reabilitação de raízes fragilizadas, com e sem reforço de resina composta
This study evaluated in vitro the resistance of roots to traction of different posts of glass-fiber used in two register to rehabilitation of weakened roots with or out reinforcement of composite resin. Thirty canines had their crowns sectioned and radicular canals endodontically treated. The roots were included in blocks of resin, having exception in 2mm ce
Publicado em: 2008
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4. Avaliação da resistência à fratura de raízes portadoras de pinos metálicos fundidos e de fibra de vidro cilíndricos e cônicos / Evaluation of the resistance to fracture of roots with cast metallic posts and cylindrical and conical fiber-glass posts
This study evaluated in vitro the fracture resistance of roots with metallic and glass-fiber intraradicular retainers, varying the geometric configuration and using the compression test. The sample had 50 central superior incisives: 10 received only the coronary preparation (control) and 40 had their crowns sectioned and radicular canals endodontically treat
Publicado em: 2007
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5. Evaluation of the resistance to fracture of roots with cast metallic posts and fiber-glass posts at different working lengths, using the compression test / Avaliação da resistência à fratura de raízes portadoras de pinos metálicos fundidos e de fibra-de-vidro com diferentes comprimentos, por meio do teste de compressão
In this study, it was evaluated, in vitro, the resistance of fracture roots with glass-fiber and metallic intraradicular retainers with different lengths, using the compression test. Sixty caries-free superior canines had their crowns sectioned and radicular canals endodontically treated. The roots were embedded in acrylic resin, except for the 4 mm of cervi
Publicado em: 2007
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6. Avaliação da retenção de pinos intra-radiculares fixados com cimento resinoso e de fosfato de zinco, em dentes obturados com cimento à base de óxido de zinco e eugenol, em diferentes períodos entre a obturação e preparo protético/ cimentação dos pinos / Evaluation of intra-radicular posts fixed with resin cement and zinc phosphate cement, in teeth sealed with zinc oxide and eugenol-based sealers, at different periods between the obturation and prosthetic preparation/post cementation
In this study, it was evaluated in vitro the retention of intraradicular posts cemented with resinous sealer and zinc phosphate sealer, in teeth obtured with zinc oxide eugenol-based cement, in different periods between the obturation, preparation procedure of the prosthetic space and posts cementation, by means of tensile test. Sixty superior canines had th
Publicado em: 2007
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7. Resistencia de união e caracterização morfologica da dentina coronaria e radicular tratada com sistemas adesivos / Blond strenght and morphologic characterization of crown and root dentine treated with adhesive systems
Este estudo teve como objetivos: (a) caracterizar a morfologia, a densidade e a área transversal de túbulos dentinários da dentina coronária (profunda) e radicular (terço cervical) intactas e após condicionamento com ácido fosfórico 32% (AF) e primer condicionante do sistema adesivo Clearfill Protect Bond (P); e (b) avaliar e comparar a resistência
Publicado em: 2007
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8. Pilot study of the adhesion between Ni-Cr alloys and ceramics when prosthetic variables were accomplish / Efeito das variáveis laboratoriais protéticas na adesão da porcelana com ligas de níquel-cromo
The metalceramic crowns are usually used in dentistry because they provide a resistant structure due to its metallic base and its aesthetics from the porcelain that recovers this structure. To manufacture these crowns, a series of stages should be accomplished in the prosthetic laboratories, and many variables can influence its success. Changes in these vari
Publicado em: 2006
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9. Comprovação da real comunicação entre o endodonto e o periodonto através do canal cavo inter-radicular e sua prevalência em molares inferiores humanos
The neurovascular system of the pulp and of the periodontium is interconnected and among the possible intercommunications between these two tissues, there is the cavo inter-radicular canal. It is a small canal that goes through any inter-radicular dentine and arises in the furca region of the multi-radicular teeth. Its predominance has been studied in the li
Publicado em: 2006
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10. "Influência dos materiais restauradores protéticos na transmissão da carga oclusal : método da interferometria holográfica" / Influence of prosthetic restorative materials at occlusal load transmission. Holographic Interferometry Method
Although researches assert that restoring dental material, due to their different mechanical properties, influences at load transmission to support tissues, it was not find any conclusive scientific evidence. Researches with finite element, implants and different prosthetic reconstruction material do not have an agreement in terms of results. So, considering
Publicado em: 2005
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11. Avaliação do desajuste marginal de coroas totais fundidas em titanio comercialmente puro utilizando diferentes padrões para fundição / Evaluation of marginal misfit of casting commercially pure titanium total crow using differrent pattern for casting
Patterns for casting metallic restorations are usually obtained from wax. However, it is speculated that increased marginal misfits could be created caused by dimensional changes during the removal of the pattern from the cast. Therefore, chemically activated acrylic resin is a routinely option in dental commercial laboratories. The characteristics of titani
Publicado em: 2005
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12. Influencia da altura do remanescente coronario e do tipo de retenção intra-radicular na resistencia e modo de fratura de raizes bovinas restauradas com coroas totais
The purpose of this study was to evaluate the influence of dental coronal structure height and different types of intraradicular retention on the fracture strength of bovine roots restored with total crowns made of laboratory composite resin under the following conditions: absence of dental coronal structure or presence of one or two millimeters, and five me
Publicado em: 2005