Dental Materials Strength
Mostrando 13-24 de 88 artigos, teses e dissertações.
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13. Effect of addition of nano-hydroxyapatite on physico-chemical and antibiofilm properties of calcium silicate cements
ABSTRACT Objective Mineral Trioxide Aggregate (MTA) is a calcium silicate cement composed of Portland cement (PC) and bismuth oxide. Hydroxyapatite has been incorporated to enhance mechanical and biological properties of dental materials. This study evaluated physicochemical and mechanical properties and antibiofilm activity of MTA and PC associated with z
J. Appl. Oral Sci.. Publicado em: 2016-06
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14. Sodium hypochlorite effects on dentin bond strength and acid-base resistant zone formation by adhesive systems
Abstract Aim: To evaluate the effects of 10% NaOCl gel application on the dentin bond strengths and morphology of resin-dentin interfaces formed by three adhesives. Methods: Two etch-and-rinse adhesives (One-Step Plus, Bisco Inc. and Clearfil Photo Bond, Kuraray Noritake Dental) and one self-etch adhesive (Clearfil SE Bond, Kuraray Noritake Dental) were
Braz. J. Oral Sci.. Publicado em: 2015-12
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15. Biological and mechanical properties of an experimental glass-ionomer cement modified by partial replacement of CaO with MgO or ZnO
AbstractSome weaknesses of conventional glass ionomer cement (GIC) as dental materials, for instance the lack of bioactive potential and poor mechanical properties, remain unsolved.Objective The purpose of this study was to investigate the effects of the partial replacement of CaO with MgO or ZnO on the mechanical and biological properties of the experimenta
J. Appl. Oral Sci.. Publicado em: 2015-08
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16. Bonding durability of dental sealants to deciduous and permanent teeth
AIM: To evaluate the bonding durability of materials used as sealants on different dentitions. METHODS: Deciduous (D) and permanent (P) molars were divided into four groups (n=5) and sealed with Fluroshield (F) and OptiBond FL (FL). Blocks of composite resin were built, stored in distilled water (24 h/37 °C), sectioned into 0.8 mm2 and tested at tensi
Braz. J. Oral Sci.. Publicado em: 2014-09
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17. Influence of acid etching on shear strength of different glass ionomer cements
AIM: To assess the influence of dental etching on the shear strength of different glass ionomer cements. METHODS: The crown of 60 bovine incisors was prepared to obtain a flat, smooth surface, were attached to a PVC tube and randomly divided into six groups: Group 1 - Riva Self Cure without etching; Group II - Riva Self Cure with pre-etching; Group III - Max
Braz. J. Oral Sci.. Publicado em: 2013-03
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18. Influência de materiais obturadores e agentes de limpeza na resistência da união e interface adesiva de pinos de fibra de vidro à dentina intrarradicular / Influence of filling materials and cleaning agents on bond strength and adhesion interface of glass fiber post to radicular dentin
The aim of this in vitro study was to evaluate the post-cement-dentin adhesive interface quality and the effect of different filling materials and cleaning agents on the bond strength of glass fiber posts to primary root dentin. This study included 156 roots of bovine primary teeth which were endodontically treated and assigned to four groups (39 teeth each
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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19. Influência da limpeza mecânica com e sem o uso do microscópio operatório na resistência adesiva intrarradicular / Influence of mechanical cleaning with and without the use of the operating microscope in intraradicular adhesive strength
In endodontic treatment, there is an imperative need to restore the tooth, reestablishing its functions, since there is always a risk of recontamination of the root canal system and fractures. These risks are higher when there is loss of dental structure, requiring intraradicular posts to hold the restoration procedures in place. For the definitive and immed
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/02/2012
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20. Avaliação por microtração da resistência de sistemas adesivos na dentina sadia e afetada por cárie em dentes humanos / Evaluation of microtensile bond strength of adhesive systems in dentin affected by caries and healthy human teeth
O objetivo deste estudo experimental foi avaliar por microtração a resistência de dois sistemas adesivos em dentina sadia e dentina afetada por cárie em dentes humanos. Para o estudo foram utilizados vinte dentes humanos, sendo dez dentes com a dentina sadia e dez dentes com dentina afetada por cárie. Aleatoriamente, esses dentes foram divididos em quat
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/08/2011
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21. Efeito do envelhecimento por ciclagem mecânica sobre a resistência à flexão de cerâmicas odontológicas / Effect of aging by mechanical cycling on the flexural strength of dental ceramics
The objectives of this study were: 1) To evaluate the effect of aging by mechanical cycling (1 million cycles at a frequency of 2 Hz) on the biaxial flexural strength of three dental ceramics used as framework materials for fixed partial dentures (FPDs): a) yttria partially stabilized zirconia tetragonal polycrystals (Y-TZP), b) alumina polycrystals (AL) and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/07/2011
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22. Resistência de união à microtração entre camadas de materiais restauradores de diferentes matrizes / Bond strength between layers of silorane and methacrylate-based materials
A resina de silorano e a sua polimerização catiônica apresentam diferenças quanto aos materiais a base de metacrilato. Como materiais restauradores, estes poderiam ser utilizados juntos, no entanto suas moléculas diferentes poderiam provocar incompatibilidade. Por isso é importante avaliar a união interfacial desses materiais tendo como objetivo a com
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/06/2011
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23. Avaliação do selamento dentinário e resistência de união de sistemas adesivos / Evaluation of dentin sealing and bond strength of adhesive systems
Os objetivos neste trabalho foram avaliar a Resistência de União (RU) e a Capacidade de Selamento (CS) de sistemas adesivos na dentina, em 2 tempos de estudo: inicial e após 6 meses de armazenamento em água. Para avaliação da CS, foram selecionados 20 incisivos bovinos hígidos. Na porção coronária vestibular foram realizados preparos do tipo faceta
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/03/2011
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24. Flexural strength of fluorapatite-leucite and fuorapatite porcelains exposed to erosive agents in cyclic immersion
OBJECTIVE: The aim of this study was to evaluate the fexural strength of two porcelain materials (IPS d.SIGN and IPS e.max Ceram) exposed to erosive agents. MATERIAL AND METHODS: One hundred and twenty bar-shaped specimens were made from each of fuorapatite-leucite porcelain (IPS d.SIGN) and fuorapatite porcelain (IPS e.max Ceram) and divided into 8 groups o
Journal of Applied Oral Science. Publicado em: 2011-04