Tricalcium Phosphate Cement
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Preparation of an Injectable Macroporous α-TCP Cement
Abstract One of the most important characteristics of calcium phosphate cements is their resorbability when implanted in the body. However, the in vivo resorption rate is slow due to the lack of intrinsic open porosity. In this study, macroporous structures were obtained by mixing alpha-tricalcium phosphate (α-TCP) cement with a foamed liquid phase containi
Mat. Res.. Publicado em: 18/07/2016
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2. 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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3. Effects of silica addition on the chemical, mechanical and biological properties of a new α-Tricalcium Phosphate/Tricalcium Silicate Cement
The addition of tricalcium silicate (C3S) to apatite cements results in an increase of bioactivity and improvement in the mechanical properties. However, adding large amounts raises the local pH at early stages, which retards the precipitation of hydroxyapatite and produces a loss of mechanical strength. The introduction of Pozzolanic materials in cement pas
Materials Research. Publicado em: 28/10/2011
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4. Si-tricalcium phosphate cement: preparation, characterization and bioactivity in SBF
There are evidences considering the effectiveness of Si on enhancing biological properties of calcium phosphates; however, there are not many works relating to the Si-alpha-TCP bone cement. The influence of silicon doping on the properties of Α-TCP cement was analyzed. Si-TCP was obtained by a solid state reaction employing CaCO3, CaHPO4 and CaSiO3 and powd
Materials Research. Publicado em: 30/09/2011
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5. Comparative histomorphometric analysis between α-Tcp cement and β-Tcp/Ha granules in the bone repair of rat calvaria
This study compared the effect of two bioceramics on the process of bone repair: α-tricalcium phosphate (α-TCP) cement and β-tricalcium phosphate hydroxyapatite particles (β-TCP/HA). Calvarial defects were created in 50 rats, divided into two groups (α and β/HA). Software was used at 7, 21, 60, 90 and 120 days to assess bone formation. Mean new bone fo
Materials Research. Publicado em: 01/04/2011
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6. Obtenção e utilização de microesferas de parafina para confecção de arcabouços teciduais baseados em cimento de α-fosfato tricálcico = Production and use of paraffin microspheres for tissue scaffolds based on α-tricalcium phosphate cement / Production and use of paraffin microspheres for tissue scaffolds based on α-tricalcium phosphate cement
Um dos fatores mais importantes na técnica conhecida por engenharia de tecidos é o crescimento de células em suporte porosos tridimensionais conhecidos por arcabouços. Os arcabouços guiam o crescimento celular e facilitam a formação de tecidos e órgãos funcionais. Cimentos ósseos são materiais desenvolvidos há aproximadamente uma década para apl
Publicado em: 2011
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7. Influência de aditivos na injetabilidade de cimento ósseo de fosfato tricálcico / Additives influence on the injectability of tricalcium phosphate bone cement
Os cimentos de fosfatos de cálcio são biomateriais formados pela mistura de um pó de fosfato de cálcio com água ou com solução aquosa de sais orgânicos ou inorgânicos formando uma pasta que reage à temperatura ambiente ou corpórea, endurecendo como resultado da reação de precipitação. Cimentos de fosfato de cálcio são usados comumente em cir
Publicado em: 2010
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8. Sintese de cimento osseo a base de a-TCP e estudo da influencia do Mg e do Si em suas propriedades finais / a-TCP calcium phosphate cement and the influence of Mg and Si substitution on its final properties
The need for new biomaterials which could improve life quality of people who suffer from oldness diseases or who have any bone tissue injury due to accidents and diseases like obesity and cancer are resulting in a growing number of researches. In this context, the development of new orthopedics biomaterials based on calcium phosphates compounds is relevant o
Publicado em: 2010
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9. Síntese do α-fosfato tricálcico e estudo da modificação de cimentos de fosfato de cálcio com silicato tricálcico
Os cimentos ósseos de fosfato de cálcio apresentam uma série de vantagens de utilização em ortopedia e traumatologia, sendo as mais destacadas a sua biocompatibilidade e bioatividade, que permitem a osteocondução dos tecidos e o endurecimento “in situ”, permitindo maior facilidade de manipulação. A principal desvantagem destes cimentos é sua ba
Publicado em: 2010
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10. Desenvolvimento de cimento ósseo de fosfato de cálcio como suporte para o crescimento de tecidos
O crescimento de células em arcabouços tridimensionais porosos tem se tornado progressivamente ativo na engenharia de tecidos. Os arcabouços guiam o crescimento celular, sintetizam uma matriz extracelular e outras moléculas biológicas, e facilitam a formação de tecidos e órgãos funcionais. Um cimento deste tipo pode ser preparado misturando um sal d
Publicado em: 2009
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11. Uso do cimento de osso alfa-tricálcio-fosfato no tratamento cirúrgico da cavidade mastóidea. Estudo experimental / Alpha-tricalcium phosphate bone cement in the surgical treatment of mastoid cavity. Experimental study
Introduction: Many authors consider open cavity mastoidectomy the surgical procedure of choice for the treatment of otitis media with cholesteatoma, due to the high incidence of recurrence of the disease. However, the formation of this open cavity can generate some complications and mastoid cavity obliteration is one type of technique for the elimination of
Publicado em: 2008
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12. Effect of sterilization on the properties of CDHA-OCP-beta-TCP biomaterial
The effect of the method of sterilization on the physical, chemical and mechanical properties of a new bone repairing material was studied. The material was obtained by thermal hydrolysis of beta-tricalcium phosphate/orthophosphoric acid cement and was composed of calcium deficient hydroxyapatite, octacalcium phosphate (OCP), and beta-tricalcium phosphate. P
Materials Research. Publicado em: 2007-03