Cement Based Composite
Mostrando 13-24 de 40 artigos, teses e dissertações.
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13. Effect of different endodontic sealers on push-out bond strength of fiber posts
Despite the increasing demand for fiber-reinforced composite (FRC) posts, their bonding to root canals is still subject to debate. Endodontic sealers may affect the bond strength between fiber posts and root canal dentin. Aim: To compare the effects of different sealers on fiber post bond strength. Methods: Sixty teeth were divided into 4 groups according
Braz. J. Oral Sci.. Publicado em: 2015-06
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14. In situ Synchrotron X-ray Powder Diffraction Study of the Early Hydration of α-tricalcium Phosphate/tricalcium Silicate Composite Bone Cement
Bioactivity, osteogenicity and mechanical properties of α-tricalcium phosphate (α-TCP) based phosphates cements can be improved by adding tricalcium silicate (C3S); however, the addition of C3S delays the precipitation and growth of calcium deficient hydroxyapatite (CDHA). Thus, the aim of this work was the study of in situ setting reaction of α-TCP/C3S c
Mat. Res.. Publicado em: 2015-02
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15. Evaluation of shear bond strength of two resin-based composites and glass ionomer cement to pure tricalcium silicate-based cement (Biodentine®)
Objectives: Tricalcium silicate is the major constituent phase in mineral trioxide aggregate (MTA). It is thus postulated that pure tricalcium silicate can replace the Portland cement component of MTA. The aim of this study was to evaluate bond strength of methacrylate-based (MB) composites, silorane-based (SB) composites, and glass ionomer cement (GIC) to
J. Appl. Oral Sci.. Publicado em: 2014-07
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16. Effects of coronal substrates and water storage on the microhardness of a resin cement used for luting ceramic crowns
Composite resin and metallic posts are the materials most employed for reconstruction of teeth presenting partial or total destruction of crowns. Resin-based cements have been widely used for cementation of ceramic crowns. The success of cementation depends on the achievement of adequate cement curing. Objectives: To evaluate the microhardness of Variolink
J. Appl. Oral Sci.. Publicado em: 2014-07
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17. Treatments of non-wood plant fibres used as reinforcement in composite materials
This paper presents a summary of the knowledge on fibres and pulps of non wood tropical plants used as reinforcement in cementitious composites accumulated during the recent years by Guadeloupean and Brazilian teams participating in collaborative work. Vegetable fibres represent a good alternative as non-conventional materials for the construction of ecologi
Mat. Res.. Publicado em: 07/06/2013
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18. Aproveitamento do resíduo do coco verde para produção de compósitos destinados à construção rural / Use of green coconut residue for composites production for rural construction
A presente tese apresenta a utilização da fibra da casca do coco verde como reforço de matriz cimentícia para produção de fibrocimentos. Embora orgânico, o resíduo do coco verde apresenta difícil degradação e diminuí da vida útil de aterros sanitários e lixões. Para viabilizar o uso do resíduo do coco verde (fibra), como reforço de compósit
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/04/2012
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19. Avaliação in vitro da ação antimicrobiana de três cimentos endodônticos modificados com nanopartículas de prata
One of the functions of the filling of root canals is complete it as airtight as possible, stimulating the repair of periapical tissues and preventing microorganisms able to reinfect the root canal system. So it is necessary that the sealer has some desirable properties. Among these, there is the need to be bactericidal, or at least, be detrimental to bacter
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/07/2011
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20. Cement - steatite composites reinforced with carbon fibres: an alternative for restoration of brazilian historical buildings
Steatite is a mineral which has been employed in the carving of elements in facades of Brazilian historical buildings and churches since the 17th century. Over the years, many of those historical buildings suffered the consequences of weathering with a current need for restoration. Recently a special cement-based mortar containing additions of fine powder wa
Materials Research. Publicado em: 25/02/2011
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21. Influence of surface roughness and the use of new types of fiber in bearing pads of cement-based material for precast concrete connections / Influência da rugosidade superficial e o uso de novos tipos de fibras em almofadas de argamassa para ligações de concreto pré-moldado
This paper presents the study of a mortar modified to be used as a bearing pad connections between precast concrete elements. This mortar is composed of cement and sand, with the addition of styrene-butadiene latex (SB), lightweight aggregate (vermiculite) and short fibers (polypropylene, glass and PVA). Previous research showed that this composite presents
Publicado em: 2010
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22. Microstructure and mechanical properties of gypsum composites reinforced with recycled cellulose pulp
The use of waste fibers for the reinforcement of brittle matrices is considered opportune for the sustainable management of urban solid residues. This paper examines the microstructure and mechanical properties of a composite material made of gypsum reinforced with cellulose fibers from discarded Kraft cement bag. Two different kinds of gypsum were used, nat
Publicado em: 2010
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23. Análise mecânica de retentores intra-radiculares / Mechanical analysis of endodontic post
The fiber-reinforcement composite (FRC) posts introduced the new concept of restorative system, in which the various components of the reconstruction: post, cement, filling material and dentin have now become a complex mechanically homogeneous. The knowledge of the structure, composition and physical properties of these fiber posts systems is important in or
Publicado em: 2010
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24. A influência da técnica do preparo cavitário utilizando laser Er: YAG e dos tipos de materiais restauradores na prevenção de cárie secundária
The influence of the cavity preparation technique and the types of restorative materials containing fluorides in the prevention of the secondary caries lesions was evaluated in this in vitro study. In a logic sequence the subject was approach by four manuscripts. The first study made a bibliographic revision about the laser employment in the prevention of th
Publicado em: 2009