Bioceramics
Mostrando 13-24 de 28 artigos, teses e dissertações.
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13. 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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14. Síntese e caracterização de pós de fosfato tricálcio-β e de hidroxiapatita: elaboração de bifásicos HA/TCP-β para aplicações como substituto ósseo / Synthesis and characterization of powders of β -Tricalcium phosphate and hydroxyapatite: elaboration of HA/β -TCP biphasic for applications as bone substitute
The treatments of bone loss are current topics of research. The materials that stand out in the treatments of reconstruction and formation of new bone tissue, are the hydroxyapatite, the α and/or β calcium phosphates, and biphasic hydroxyapatite / α and/or β calcium phosphate. It is known from literature that these biomaterials h
Publicado em: 2011
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15. 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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16. 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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17. Material properties and in vitro biocompatibility of a newly developed bone cement
In this study mechanical properties and biocompatibility (In Vitro) of a new bone cement were investigated. A new platform technology named COOL is a variable composite of dissolved, chemically modified PMMA and different bioceramics. COOL cures at body temperature via a classical cementation reaction. Compressive strengths ranging from 3.6 ± 0.8 to 62.8 ±
Materials Research. Publicado em: 2009
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18. INFLUÊNCIA DA SECAGEM E DO TEMPO DE ENVELHECIMENTO NA OBTENÇÃO DE COMPOSITOS DE HIDROXIAPATITA - COLÁGENO BOVINO
Apatites have been widely studied lately as bioceramics in the search for materials which are more and more biocompatible with biological tissues. Unavoidably, the implant of any kind of material in a human body originates a response from this body, characteristic which does not depend only on the nature and composition of the biomaterial, but also on factor
Publicado em: 2009
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19. Adição de complexo vitamínico em duas bioceramicas e seu efeito na regeneração óssea / BONE REGENERATION EFFECT AFTER THE ADDITION OF A VITAMIN COMPLEX IN TWO BIOCERAMICS
One of the goals of the Biomaterials research is the development of devices that help bone regenaration. Two synthetic ceramics has been widely used with that purpose: Hidroxyapatite (HAp) and Beta tricalcium phosphate (b-TCP). In many situations it is desirable that the resorption rate of these materials by the body matches the bone growth rate. In these ca
Publicado em: 2009
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20. 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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21. Performance of 3Y-TZP bioceramics under cyclic fatigue loading
In this work, the static mechanical properties and cyclic fatigue life of 3 mol. (%) Y2O3-stabilized tetragonal zirconia polycrystalline (3Y-TZP) ceramics were investigated. Pre-sintered samples were sintered in air at 1600 °C for 120 minutes, and characterized by X ray diffraction and scanning electronic microscopy. Hardness and fracture toughness were det
Materials Research. Publicado em: 2008-03
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22. Sintese e propriedades de alumoxanos : modificações de superficie e aplicações / Synthesis and properties of alumoxanes : surface modifications and applications
Alumoxanes are materials which their cores are identical to alumina´s core, consisting of an Al-O-Al backbone with a variety of pendant groups, such as alkyl, aryl, halides or any functional groups bonded with aluminum atoms. The first synthesis of these compounds had been made by reacting organoaluminum and water or other compounds cointaining oxygen. In t
Publicado em: 2008
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23. Biomaterials : hydroxyapatite deposition study via polymeric process on cp Ti surfaces modified by laser beam / Biomateriais : estudo da deposição de hidroxiapatita por via polimerica sobre superficies de Ti cp modificado por feixe de laser
The biomaterials area has been focused on the development of synthetic or artificial materials that have similar properties to the human bone tissue. Among the diverse alternatives, one of the most used is the metallic substrate coated with bioceramics. By this technique it is possible to combine biocompatibilty, mechanical properties and corrosion resistanc
Publicado em: 2007
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24. Obtenção e caracterização de hidroxiapatita porosa pelo método gelcasting de espumas para uso como implantes
Biocerâmicas porosas são utilizadas para que se forneça local para o tecido ósseo crescer e fixar o implante biologicamente. Foi utilizada hidroxiapatita (HA), que é uma cerâmica bioativa e permite o crescimento de tecido ósseo e revascularização da área de implante pela ligação química estabelecida entre a fase mineral dos ossos com a hidroxiap
Publicado em: 2007