Academic literature on the topic 'FOSFATO TRICÁLCICO'
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Journal articles on the topic "FOSFATO TRICÁLCICO"
Alves, Hugo Leonardo Rocha, Luis Alberto dos Santos, and Carlos Pérez Bergmann. "Influência de aditivos na injetabilidade de cimento ósseo de fosfato tricálcico." Matéria (Rio de Janeiro) 11, no. 3 (September 2006): 324–31. http://dx.doi.org/10.1590/s1517-70762006000300022.
Full textJuárez López, María Lilia Adriana, María del Pilar Adriano Anaya, Nelly Molina Frechero, and Francisco Murrieta Pruneda. "Efecto de la remineralización de lesiones cariosas incipientes de un barniz de flúor con fosfato tricálcico." Acta Pediátrica de México 39, no. 5 (September 11, 2018): 263. http://dx.doi.org/10.18233/apm39no5pp263-2701673.
Full textRodrigues, P. L., F. S. de Almeida, M. Motisuke, and E. de Sousa. "Efeito da adição de alumina nas propriedades físicas e mecânicas do β-fosfato tricálcico." Cerâmica 58, no. 347 (September 2012): 368–73. http://dx.doi.org/10.1590/s0366-69132012000300014.
Full textSarabia-Condes, J. M., S. Villaescusa-Marín, C. Hernández-García, and M. A. Martín-Ferrero. "Osteotomía tibial de valguización con cuñas de fosfato tricálcico." Revista de Ortopedia y Traumatología 51, no. 4 (August 2007): 182–87. http://dx.doi.org/10.1016/s0482-5985(07)75547-5.
Full textAlmeida, R. S., M. H. Prado da Silva, D. Navarro da Rocha, I. I. A. Ribeiro, A. A. Barbosa Júnior, F. B. Miguel, and F. P. Rosa. "Regeneração de defeito ósseo crítico após implantação de fosfato de cálcio bifásico (β-fosfato tricálcico/pirofosfato de cálcio) e vidro bioativo fosfatado." Cerâmica 66, no. 378 (June 2020): 119–25. http://dx.doi.org/10.1590/0366-69132020663782707.
Full textBronstein, Marcos, Christian Nappe, Juan Villavicencio, Hernán Toro, and Hernán Guiñez. "Preservación de alvéolos mediante fosfato tricálcico beta, con y sin membrana." Revista Clínica de Periodoncia, Implantología y Rehabilitación Oral 9, no. 2 (August 2016): 168–74. http://dx.doi.org/10.1016/j.piro.2016.05.005.
Full textGálvez Calla, Luis H., Mirtha Roque Alcarraz, and Jorge Villavicencio Gastelú. "Pasta terapéutica anti-A. Producto (1ra parte) avance." Odontología Sanmarquina 8, no. 2 (May 14, 2014): 6. http://dx.doi.org/10.15381/os.v8i2.3138.
Full textDelfino, C. S., C. Ribeiro, G. F. Vieira, A. H. A. Bressiani, and M. L. Turbino. "Uso de novos materiais para o capeamento pulpar (hidroxiapatita - HAp e fosfato tricálcico - β-TCP)." Cerâmica 56, no. 340 (December 2010): 381–88. http://dx.doi.org/10.1590/s0366-69132010000400011.
Full textSarmento, Marco, Samuel Martins, and Jacinto Monteiro. "Fosfato β-Tricálcico Monobloco no Tratamento de Fraturas Proximais do Úmero Cirúrgicas." Acta Médica Portuguesa 29, no. 1 (January 29, 2016): 41. http://dx.doi.org/10.20344/amp6233.
Full textSarmento, Marco, Samuel Martins, and Jacinto Monteiro. "Fosfato β-Tricálcico Monobloco no Tratamento de Fraturas Proximais do Úmero Cirúrgicas." Acta Médica Portuguesa 29, no. 1 (January 29, 2016): 41. http://dx.doi.org/10.20344/amp.6233.
Full textDissertations / Theses on the topic "FOSFATO TRICÁLCICO"
Silveira, Julio Cesar Colpo da. "Cimentos ósseos alfa-fosfato tricálcico e alfa fosfato tricálcico de dupla pega : desenvolvimento/caracterização para fins de liberação controlada de fármacos e vigilância sanitária." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/173182.
Full textTo better regulate it is necessary to know the new Technologies. Orthopedics and dentistry have demonstrated special interest in biocompatible technologies that present the alpha phase of tricalcium phosphate (α-TCP), whit can form calcium-deficient hydroxyapatite (like bone hydroxyapatite). However, its application is limited by the low mechanical resistance. To overcome this limitation, acrylic hydrogel containing liquid reducer was added to the α-TCP cement, resulting in the α-TCP double setting cement. From this, composites of α-TCP and α-TCP double setting cements aggregates of the drugs gentamicin sulfate, lidocaine, bupivacaine and levobupivacaine hydrochlorides were developed and the functionality drug delivery systems was tested. There isn't bibliographic data about drugs release systems by α-TCP double setting cement. Qualitative and quantitative methodologies were applied. For the analytical differences, we considered the 95% confidence interval with a level of significance lower than 5% (p <0.05). It comprised three different phases. In Phase 1, an α-TCP and α-TCP double setting cement specimens were prepared with and without (control group) drugs addition. In Phase 2, the studied biomaterials were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, compression mechanical resistance, density, porosity and liquid absorption, being also proposed of the porosity analysis by images. The Phase 3 corresponds to the study of the in vitro drug release kinetics. The specimens were immersed in phosphate buffer solution pH 7.0 and the samples analyzed by UV-vis. As an innovative proposal, drug release was also assessed using Electrochemical Impedance Spectroscopy (EIS). According to the results, both cements functioned as controlled drug delivery systems. The hydrogel improved the properties of cement moreover the drugs did not impair these properties. Fick diffusion was the main mechanism involved in the process of drug release by composites, with a minor influence of polymer chain relaxation. The EIS technique proved to be promising for the evaluation of drug release.
Rostirolla, Flávia Veronezi. "Avaliação de cimentos endodônticos a base de metacrilato contendo α-fosfato tricálcico, fosfato octacálcico ou hidroxiapatita." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/125819.
Full textNew biomaterials for filling the root canal system have been introduced to the market over the past few years in order to improve the sealing of the system and stimulate its repair, in an attempt to provide better physicochemical properties and bioactivity. The aim of this in vitro study was to develop and characterize methacrilate-based sealers containing three different calcium phosphates: tricalcium phosphate, octacalcium phosphate and nanostructured hydroxyapatite. Cements were formulated from obtaining a base resin using 70% of dimetilmetacrilato urethane (UDMA), 15% glycerol 1.3 dimetilmetacrilato (GDMA) and 15% ethoxylated bisphenol A glycol dimethacrylate (BISEMA 6), weight. To produce a dual cure cement, were added 0.5 mol% camphorquinone (CQ), 1 mol% dihydroxyethyl p-toluidine (DHEPT), 1 mol% of benzoyl peroxide (BP) and 1 mol% ethyl 4- dimethilaminobenzoato (EDAB). To impart radiopacity to the sealers, were added 40% ytterbium trifluoride (YbF3) by weight silanized previously. In the base resin, is added by weight 10% of α-tricalcium phosphate (TCP α-), octacalcium phosphate (OCP) or hydroxyapatite (HAp), constituting 3 experimental groups, there is still a group that were not added calcium phosphate, which is the control group and a group composed of the commercial sealer AH Plus. Experimental sealers were evaluated by the degree of conversion testing, radiopacity, flow, film thickness, deposition of apatite, the presence of calcium ions in simulated body fluid solution (SBF) by atomic absorption spectrometry, pH, characterization of the interface cement/dentin and the penetration the cement in the dentinal tubules, and bond strength. All groups exhibited radiopacity, flow and film thickness in accordance with ISO 6876. The degree of conversion of all sealers increased over a period of 14 days. The sealers showed mineral deposition in order GHAp>Gα-TCP>GOCP, except for GControl and GAHPlus groups. After 28 days of immersion in SBF, all tested sealers presented greater values for resistance to dislodgement from root dentin. This study showed that experimental methacrylate-based root canal sealers with hydroxyapatite, α-tricalcium phosphate and octacalcium phosphate addition demonstrated mineral deposition after immersion in SBF, suggesting the bioactivity of these materials. All calcium phosphates tested presented suitable physicochemical properties.
Alves, Hugo Leonardo Rocha. "Cimento ósseo de fosfato tricálcio : síntese e influência de aditivos na sua injetabilidade." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2005. http://hdl.handle.net/10183/7223.
Full textZavaglia, Felipe de Carvalho. "Síntese, caracterização e processamento de beta fosfato tricálcico para manufatura de implantes personalizados." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263612.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica
Made available in DSpace on 2018-08-18T11:48:55Z (GMT). No. of bitstreams: 1 Zavaglia_FelipedeCarvalho_M.pdf: 14473856 bytes, checksum: 25fac84e52ec20bec15f8b33d830a26a (MD5) Previous issue date: 2011
Resumo: Os biomateriais vêm sendo desenvolvidos e utilizados há muito tempo, e, uma questão relevante a se observar, é a conformação destes materiais para a confecção de produtos. Um novo conceito surge com a prototipagem rápida. Como os componentes do organismo humano são únicos e distintos, as tecnologias modernas de prototipagem rápida e personalização de implantes se destacam em importância. O uso de prototipagem rápida está relacionado normalmente à produção indireta de próteses e outras soluções médicas; no entanto, estudos recentes tem sido feitos com o objetivo de se utilizar as técnicas de prototipagem rápida diretamente com os biomateriais. O objetivo do presente pesquisa foi sintetizar e caracterizar a biocerâmica de beta fosfato tricálcico (ß-TCP) para aplicações em três tipos de casos de implantes. O procedimento experimental constou da síntese do ß-TCP e caracterização através de microscopia eletrônica de varredura, avaliação da distribuição granulométrica, espectroscopia de fluorescência de raios X e difração de raios X. Foram preparados, com essa biocerâmica, implantes de formatos simples (como pequenos discos), através da conformação por prensagem uniaxial e sinterização. A preparação dos grânulos de ß-TCP e ligantes foi feita de duas maneiras: manualmente e através de equipamento spray dryer. Após essa preparação dos grânulos foi realizada a prototipagem rápida, com sucesso, de pequenos corpos de prova em equipamento 3D Printer. O ß-TCP sinterizado também foi utilizado, através da técnica PVD (deposição física a vapor) para revestir implantes macro porosos de titânio metálico, obtidos por outro equipamento de prototipagem rápida (sinterização de metais direta a laser). Os resultados obtidos neste trabalho foram satisfatórios, demonstrando que as técnicas desenvolvidas de utilização do ß-TCP pode levar a obtenção de implantes úteis no tratamento de pessoas com problemas de pequenos defeitos ósseos
Abstract: Biomaterials have been developed and used for a long time, and a relevant question is about conformation of these materials for products confectioning. A new concept arises with rapid prototyping. Due to the components of human organism being single and distinct, modern techniques of rapid prototyping and implants personalization stand highly. The use of Rapid prototyping is usually related to indirect production of prosthesis and other medical solutions, however, recent studies have been done with the goal to use rapid prototyping techniques directly with biomaterials. The present research goal was to synthesize and characterize beta tricalcium phosphate (ß-TCP) for application in three types of implants. The experimental procedure consisted in the synthesis of ß-TCP and its characterization by scanning electronic microscopy, granulometric distribution evaluating, x-ray fluorescence spectroscopy and X-ray diffraction. Simple structures were prepared with this bioceramic by axial pressing and sintering. The preparation of ß-TCP granules with binder was done in two ways: manually and by spray drying equipment. After granules preparation, rapid prototyping was performed with success of small specimens with a Zcorp 3D Printer equipment. The sintered ß-TCP was also used for coating macro porous metallic titanium implants obtained by other rapid prototyping equipment, (direct metal laser sintering) using PVD technique (physical vapor deposition). The present results were satisfactory, showing that the techniques developed for ß-TCP can lead to useful implants for small bone defects
Mestrado
Materiais e Processos de Fabricação
Mestre em Engenharia Mecânica
Dórea, Neto Francisco de Assis [UNESP]. "Avaliação do cimento de alfa-fosfato tricálcico em artrodeses tarsocrurais experimentais em cães." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/101130.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Objetivou-se nesta pesquisa estudar o comportamento e a bioatividade do cimento de alfa-fosfato tricalcico de dupla pega em artrodeses tarsocrurais. Utilizaram-se seis caes, adultos, macho ou femeas, sem raca definida, com idades entre dois e cinco anos e pesando entre 18 e 30 kg. Foram constituidos dois grupos com 3 animais cada: um grupo onde empregou-se o cimento de ¿-fosfato tricalcico de dupla pega (Grupo I) e outro utilizando osso esponjoso autogeno (Grupo II). A avaliacao radiografica ocorreu aos 30, 45, 60, 90 e 120 dias apos o procedimento cirurgico. Radiograficamente, a fusao dos ossos das articulacoes ocorreu em ambos os grupos apos o 30o dia, sem qualquer reacao adversa ou do tipo corpo estranho. A estabilidade das articulacoes foi satisfatoria com a utilizacao de fixadores esqueleticos externos. Histologicamente, aos 120 dias, observaram-se diferencas na maturidade das celulas osseas entre os dois grupos ocorrendo absorcao lenta e remodelacao da bioceramica (Grupo I). Relativamente a microscopia eletronica de varredura, foi observada formacao de osso novo diretamente na superficie da bioceramica, sem causar formacao de lacuna entre a interface osso-ceramica. O cimento de alfa-fosfato tricalcico de dupla pega demonstrou ter uma boa resistencia mecanica, propriedades de biocompatibilidade, crescimento osseo direto sobre a ceramica, osteoconducao e, ainda, ocorrencia de lenta absorcao quando comparado ao enxerto ósseo.
The purpose of this research was to estuding the behaviour and bioactivity of the á-tricalcium phosphate cement double setting in tarsocrural arthrodesis. Therefore, six canines, both male and female adults mongrel dogs, aged between two and five years old and weighing between 12 and 18kg, were the objects of this study. They were vi divided into two groups with three animals each. On Group I á-tricalcium phosphate cement double setting was used. The Group II, also considered the control group, autogenous cancellous bone graft was used. The periods chosen for the radiographic analysis were 30, 45, 60, 90 and 120 days after surgery. Radiographyc bone fusions on the joints were observed on both groups after 30 days. The stabilization of the joints with external fixators proved to be very satisfactory. No reaction of foreigh body or infection process due to the material used was observed. The histological analysis performed after 120 days after surgery revealed differences in terms of the maturity of the bone cells between the two groups, showing slow absorption and remodelling of the bioceramic (Group I). In terms of the scanning electronic microscopy, bone growth was detected, right on the surface of the bioceramic, without causing gap formation on the bone-ceramic joint. The á-tricalcium phosphate cement double setting demonstrated to have a good mechanical resistance, bioacompatibility properties, direct bone growth on the ceramic and osteocondution and, still, the occurrence of slow absorption when compared to the bone graft.
Dórea, Neto Francisco de Assis. "Avaliação do cimento de alfa-fosfato tricálcico em artrodeses tarsocrurais experimentais em cães /." Jaboticabal : [s.n.], 2007. http://hdl.handle.net/11449/101130.
Full textBanca: Paola Castro Morais
Banca: Patricia Popak Giordano
Banca: Delphim da Graça Macoris
Banca: Márcia Rita Fernandes Machado
Resumo: Objetivou-se nesta pesquisa estudar o comportamento e a bioatividade do cimento de alfa-fosfato tricalcico de dupla pega em artrodeses tarsocrurais. Utilizaram-se seis caes, adultos, macho ou femeas, sem raca definida, com idades entre dois e cinco anos e pesando entre 18 e 30 kg. Foram constituidos dois grupos com 3 animais cada: um grupo onde empregou-se o cimento de ¿-fosfato tricalcico de dupla pega (Grupo I) e outro utilizando osso esponjoso autogeno (Grupo II). A avaliacao radiografica ocorreu aos 30, 45, 60, 90 e 120 dias apos o procedimento cirurgico. Radiograficamente, a fusao dos ossos das articulacoes ocorreu em ambos os grupos apos o 30o dia, sem qualquer reacao adversa ou do tipo corpo estranho. A estabilidade das articulacoes foi satisfatoria com a utilizacao de fixadores esqueleticos externos. Histologicamente, aos 120 dias, observaram-se diferencas na maturidade das celulas osseas entre os dois grupos ocorrendo absorcao lenta e remodelacao da bioceramica (Grupo I). Relativamente a microscopia eletronica de varredura, foi observada formacao de osso novo diretamente na superficie da bioceramica, sem causar formacao de lacuna entre a interface osso-ceramica. O cimento de alfa-fosfato tricalcico de dupla pega demonstrou ter uma boa resistencia mecanica, propriedades de biocompatibilidade, crescimento osseo direto sobre a ceramica, osteoconducao e, ainda, ocorrencia de lenta absorcao quando comparado ao enxerto ósseo.
Abstract: The purpose of this research was to estuding the behaviour and bioactivity of the á-tricalcium phosphate cement double setting in tarsocrural arthrodesis. Therefore, six canines, both male and female adults mongrel dogs, aged between two and five years old and weighing between 12 and 18kg, were the objects of this study. They were vi divided into two groups with three animals each. On Group I á-tricalcium phosphate cement double setting was used. The Group II, also considered the control group, autogenous cancellous bone graft was used. The periods chosen for the radiographic analysis were 30, 45, 60, 90 and 120 days after surgery. Radiographyc bone fusions on the joints were observed on both groups after 30 days. The stabilization of the joints with external fixators proved to be very satisfactory. No reaction of foreigh body or infection process due to the material used was observed. The histological analysis performed after 120 days after surgery revealed differences in terms of the maturity of the bone cells between the two groups, showing slow absorption and remodelling of the bioceramic (Group I). In terms of the scanning electronic microscopy, bone growth was detected, right on the surface of the bioceramic, without causing gap formation on the bone-ceramic joint. The á-tricalcium phosphate cement double setting demonstrated to have a good mechanical resistance, bioacompatibility properties, direct bone growth on the ceramic and osteocondution and, still, the occurrence of slow absorption when compared to the bone graft.
Doutor
Santos, Paula Dapper. "Influência da adição de fosfato octacálcico, alfa-fosfato tricálcico ou hidroxiapatita nas propriedades de um cimento de ionômero de vidro." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/125811.
Full textThe modern protocol for treating caries disease is based on minimal invasive intervention, which can employ incomplete caries removal, to reduce post-operatory problems. For bearing capacity to adhere to tooth substrate, the glass ionomer cement is indicated for this process. Furthermore, the calcium phosphates have potential to induce mineral deposition. Thus, the aim of this study was to evaluate the effect of the addition of octacalcium phosphate (OCP), αtricalcium phosphate (α-TCP), or nanostructured hydroxyapatite (HA) on the properties of commercial restorative glass ionomer cement, and to characterize demineralised bovine dentin restored with these materials. Three test groups were produced: GOCP, GTCP, and GHA, through the substitution of 5%, by mass, of original cement powder with 5%, by mass, of OCP, α-TCP or HA, respectively. The group GCIV, without alteration, was the control group. Radiopacity, initial hardening time, and depth of cure were the properties evaluated, all according to ISO 9917-2:2010. Dentin characterization was conducted using Knoop microhardness and Raman spectroscopy, through 962 cm-1 intensity peak, to verify phosphate existence in inner dentin. Radiopacity results were equivalent to 3 mmAl. Initial hardening time varied between 39.06 + 1.15 min, for GCIV, and 58.39 + 2.64 min, for GTCP. For depth of cure, values varied between 1.61 + 0.04 mm, for GHA, and 1.77 + 0.04 mm, for GTCP. All results of radiopacity, initial hardening time and depth of cure were according to what is established by the standard. Hard sound dentin values were superior both for restored groups hardness and for demineralised dentin hardness. Though illustrative, different groups dentin images show varied phosphate intensities, especially regarding sound dentin, allowing to infer that, among demineralised groups, there are higher intensity in GHA. Thus, it is possible to conclude that the addition of calcium phosphates did not impaired commercial glass ionomer cement properties and that groups images representing inner dentin phosphate intensity suggest that evaluated materials may present potential mineral deposition induction action.
Jesus, Jailson de. "Elaboração e caracterização de biocompósitos de hidreto de titânio/fosfato tricálcico para aplicações biomédicas." Universidade do Estado de Santa Catarina, 2011. http://tede.udesc.br/handle/handle/1793.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
Titanium is one of the most used biomateriais in manufacturing dental implants, especially titanium grade 4. However, titanium is a bioinert material, i.e. the interface between titaiiiun-i and host bone is a simple interlocking bonding, which can iead to the loosening ofthe implant and the eventual failure of the implantation. Bone neoformation and long terrn stability can be achieved by using bioactive materiais. Tricalcium phosphate (TCP) is one of the best options among bioactive materiais, due to its chernical and crystallographic structure being similar to that of bone mineral. However, one ofits primary restrictions on clinical use as a ioad-bearing implant is its poor mechanical properties. A good combination of the bioactivity of TCP and the mechanical properties of titanium is considered to be a promising approach to fabricating more suitable biornedical materiais for load-bearing àpplications. Therefore, the aim of this study was to ~eve1op bioactive composites by powder metallurgy using titanium hydride and tricalciuin phosphate to enhance the biocompatibility and the osseointegratjon of dental irnplants. Titanium based composites were prepared from titanium hydride (TiH2) with 2.5, 5, 7.5 and 10% in volume of β-TCP. The TiH2 was provided by Centro Técnico Aeroespacial (CTA) with a mean particle sige of l5μm. The β-TCP was provided by Cerarnic Group from UDESC with particle size below 180 nm. The mixtures were prepared with alcohol and zirconia baus in a high energy mili for five hours, foilowed by drying in a rotating evaporator. The mixtures were then pressed at 15OMPa and sintered at 1200°C for 2 hours in either vacuum or argon atinosphere. The materiais were characterized by scanning eiectron microscopy, transmission electron microscopy, X-ray diffraction and thermal analysis. The decomposition of β-TCP occuned at approximately 1100°C leading to the formation of Ti, CaTiO3, TiO2 and TixPy phases for the composites sintered in argon. For the composites sintered in vacuum it was found the sarne phases, except rutile. The composites sintered in vacuurn were better sintered exhibiting higher densificatjon than those sintered in argon. A main crystal phase of calcium titanate with a needie-like morphology was observed in the porosity of the composites. This phase was found in higher amount in the composite sintered in argon because this material presented higher porosity. This morphology is related to the presence of pores, which allow the growth of calcium titanate on a free surface.
O titânio é um dos biomateriais mais utilizados na confecção de implantes dentários. Dentre os tipos de titânio comercialmente puro (Ti cp), o mais utilizado em implantologia é o da classe quatro. Porém, o titânio é um material bioinerte, ou seja, a fixação óssea sobre a sua superficie acontece por aderência biomecânica. Em materiais bioativos, a fixação ocorre por ligação físico- química. O TCP-13 é um politipo de fosfato de cálcio que desperta muito interesse na utilização em medicina e odontologia por causa da neoformação óssea, porém, as suas propriedades mecânicas são muito baixas, inviabilizando a sua utilização na forma pura. Muitos trabalhos têm sido relatados em que a junção do titânio e fosfatos tem contribuído no desenvolvimento de biomateriais compósitos com características bioativas. O presente trabalho teve por objetivo desenvolver compósitos bioativos ~por metalurgia do pó, utilizando hidreto de titânio / fosfato tricálcico, para melhorar a biocompatibilidade e a osseointegração de implantes dentários. Foram elaborados os compósitos a base de hidreto de titânio (TiH2) com 2,5; 5; 7,5 e 10% em volume de TCP-β. O TiH2 foi doado pelo Centro Tecnológico Aeroespacial (CTA), e apresentava granulometria média de 15 μm. O TCP-β foi fornecido pelo grupo de biomateriais cerâmicos da UDESC com tamanho de partícula inferior a 180 nm. As misturas foram elaboradas com álcool e esferas dé zircônia em moinho atritor de alta energia durante cinco horas, seguidas de secagem em evaporador rotativo. Em seguida as misturas foram compactadas uniaxialmente a frio em matriz cilíndrica e retangular sob pressão de 150 MPa. Os compactados foram sinterizados em atmosfera de argônio e a vácuo nas condições de 1200 °C, durante duas horas. Os materiais foram caracterizados por microscopia eletrônica de varredura, microscopia eletrônica de transmissão, difração de raios-X, e análise térmica pelos métodos de calorimetria diferencial e dilatometria. A decomposição do TCP-β ocorreu a aproximadamente 1100 °C resultando na formação de titanato de cálcio e fosfetos de titânio. As fases resultantes da sinterização em atmosfera de argônio foram Ti, CaTiO3, TiO2 e TixPy. As fases identificadas nos compósitos sinterizados a vácuo foram as mesmas com exceção do rutilo. O compósito sinterizado a vácuo apresentou urna densificação melhor que o sinterizado em argônio. A porosidade e o aparecimento de titanato de cálcio na forma de agulhas foram maiores nos compósitos sinterizados em atmosfera de argônio por causa da maior porosidade.
Seo, Juliana. "Fosfato tricálcico e hidróxido de cálcio no reparo ósseo em coelho. Estudo histológico e histomorfométrico." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/23/23141/tde-19012016-172450/.
Full textInsufficient bone volume requires restorative procedures such as use of grafts and bone substitutes for cosmetic and functional rehabilitation. The development of biomaterials made available bioceramic based on calcium phosphate that is showing to be promising alternatives for the restoration of bony structures, however it do not has osteoinductive potential. Calcium hydroxide (Ca(OH)2) shows antibacterial properties and induce bone tissue formation as well. The objective of this research was to evaluate the bone healing process promoted by BTCP and Ca(OH)2 isolated or conjugated. The experiment was conducted in posterior rabbit tibiae of 18 animais. Two animais received bone markers (alizarin, calcein, tetracycline) and each of their tibias received a type offiller material (BTCP, Ca(OH)2, BTCP plus Ca(OH)2 and blood as control group), being euthanized after 56 days for the histomorphometry and fluorescence analysis. The remaining 16 rabbits were randomly selected to receive one of the 4 filling materiais. These rabbits were euthanized on 14,28,42 and 56 days for the micromorphological analysis in hematoxylin and eosin slides. The bone formation was observed in ali groups, and who used BTCP had delay to the start of repair. The site filled with blood occurred only repair of the damaged structure, consisting of the reconstitution of the bone cortical and medullary tissue in 28 days. After 56 days, the BTCP group with Ca(OH)2 showed higher trabecular formation inside the tibia. In histomorfometric evaluation, the marker calcein had higher bone deposition values in relation to alizarin and tetracycline. It was concluded that the biomaterials BTCP and Ca(OH)2 are directly involved in the formation of bone tissue; the conjugation of Ca(OH)2 with BTCP increased bone formation potential; and there was greater bone deposition in the period between the fifth and sixth week of repairs indicated by calcein marker.
Dornas, Raul Felipe. "Cimento a base de β-fosfato tricálcico em defeitos ósseos produzidos no crânio de coelhos." Universidade Federal de Viçosa, 2013. http://locus.ufv.br/handle/123456789/5135.
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The loss of bone tissue is an important problem both in human and in veterinary medicines. For cranial bone defects, surgical intervention is necessary since, if not correct, these defects result in high number of cerebral lesions and neurological dysfunctions as well as esthetic sequelae. In such context, autogenous and alogenous grafts have given place to resorbable osteoconductive biomaterials. The objective of the present study was to evaluate a bone cement made from a solid phase (β-tricalcium phosphate and calcium sulfate dihydrate) and a liquid one (phosphoric acid 2M). These components were mixed in a stainless steel cube at a proportion of 1:1 and the material while still moldable, was applied in 15mm critical size defects in the cranial bone of rabbits, Scanning electron microscopy of the cement itself showed a complex surface with non-interconnected pores of 19.5±5.92 μm in diameter. Animals were separated in three experimental moments based on the time after surgical procedure (7, 28 and 90 days), comparing to defects that did not receive the material. Hematological and serum biochemistry revealed normal values during the entire experiment. Dehiscence, edema or signs of infection were not observed. In treated animals, alterations were observed on skin (hyperemia and necrosis) and brain (circular lesions of green color with vascular congestion) that evolved to healing at 90 days. These alterations may be related related to a low pH of the biomaterial during the implantation (3.38), resulted from the proportion of liquid:powder used in the present study (1:1). As suggested by computerized tomography and confirmed by histology, new bone formation occurred in control group from the margin of the defect and inside it. In treated group, bone growth was apparently less intense at 90 days when compared to the control one, limited to the margin of the defect and not observed inside it. Osteointegration was confirmed and neither signs of undesirable chronic inflammation nor the formation of a fibrous capsule around the material was observed. Thereby, the biomaterial was characterized as osteoconductor, osteointegrated, degradable in vivo and histologically biocompatible. The alterations in the color of nervous tissue and skin adjacent to the implant, although with no clinical relevance, indicate the need for a modification on the proportion of the biomaterial components. Possibly, reducing the relation liquid:powder may allow its application.
A perda de tecido ósseo é um problema grave tanto na medicina humana quanto na veterinária. No caso das falhas ósseas cranianas, a intervenção cirúrgica se faz necessária porque, se não forem corrigidas, provocam altos índices de lesões cerebrais e disfunções neurológicas, bem como graves sequelas estéticas. Nesse contexto, enxertos autógenos e alógenos têm sido substituídos por biomateriais osteocondutores e reabsorvíeis. O objetivo desse trabalho foi avaliar a utilização de um cimento ósseo formulado a partir de uma fase sólida (β-fosfato tricálcico e sulfato de cálcio di-hidratado) e uma fase líquida (ácido fosfórico 2M). Esses componentes foram misturados na proporção 1:1 e o material, ainda moldável, foi aplicado em defeitos ósseos de tamanho crítico no crânio de coelhos, com 15 mm de diâmetro. A análise do cimento pela microscopia eletrônica de varredura revelou superfície complexa com poros de 19,5 (±5,92) μm não interconectados. Os animais foram divididos em três momentos experimentais com base no tempo transcorrido após o procedimento cirúrgico (sete, 28 e 90 dias), onde os defeitos tratados foram comparados aos defeitos que não receberam o biomaterial. As análises hematológicas e da bioquímica sérica evidenciaram valores normais durante todo o experimento. Não foram observados deiscência, edema ou sinais de infecção. Nos animais tratados, foram observadas alterações na pele (hiperemia e necrose) e no cérebro (lesões circulares de coloração esverdeada com congestão vascular), que evoluíram para a cicatrização aos 90 dias. Essas alterações podem ser atribuídas ao baixo pH do biomaterial no momento de sua implantação (3,38), resultante da relação líquido/pó utilizada no presente trabalho (1:1). Foi sugerido pela tomografia computadorizada e confirmado pela análise histológica crescimento de osso novo, que no grupo controle ocorreu a partir das bordas e no interior do defeito. Já nos animais do grupo tratado esse crescimento foi menor aos 90 dias, quando comparado ao controle na mesma data, e limitou-se às bordas do defeito, não ocorrendo no interior. Foi demonstrada a osteointegração do biomaterial, não sendo observados sinais de inflamação crônica indesejável ou a formação de cápsula fibrosa ao seu redor. Após análise dos dados obtidos o biomaterial foi caracterizado como osteocondutor, osteointegrável, possuindo degradação in vivo e histologicamente biocompatível. As alterações na coloração no tecido nervoso na região do implante, mesmo sem comprometimento clínico, e as lesões de pele, indicam a necessidade de modificação da proporção dos componentes. Possivelmente, a redução da relação líquido/pó viabilizará sua aplicação.
Book chapters on the topic "FOSFATO TRICÁLCICO"
Lama, A. M., M. L. Fajardo, L. E. Vinasco, and C. E. Goyes. "Obtención de un Relleno Óseo a Base de Fosfato Tricálcico y Quitosana con Refuerzo de Celulosa." In V Latin American Congress on Biomedical Engineering CLAIB 2011 May 16-21, 2011, Habana, Cuba, 192–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-21198-0_49.
Full textCorrea, D., A. Almirall, R. García, L. A. Santos, A. de Aza, and J. A. Delgado. "Cementos Biomédicos de Fosfato Tricálcico Reforzados con Silicatos y Aluminatos de Calcio-Preparación, Caracterización y Estudios de biodegradación." In V Latin American Congress on Biomedical Engineering CLAIB 2011 May 16-21, 2011, Habana, Cuba, 100–103. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-21198-0_26.
Full textCOSTA, Slanna Larissa Olimpio, José Rosa De Souza FARIAS, Geysivana Késsya Garcia CARVALHO, Ketelly Estefane Da Silva ALVES, Gabriel Gregório Sousa PEREIRA, Ycaro Breno Alves De ALMEIDA, Veruska Do Nascimento SIMÕES, and Aluska Do Nascimento Simões BRAGA. "BETA FOSFATO TRICÁLCICO (β-TCP): UMA BREVE REVISÃO." In GESTÃO DO CONHECIMENTO NA INDÚSTRIA 4.0, 52–62. Uniedusul Editora, 2020. http://dx.doi.org/10.29327/514128-4.
Full textBatista, Thatiane Cristine Silva Pereira, and Gerson Avelino Fernandes. "SÍNTESE E ESTUDO DE HIDROXIAPATITA E BETA FOSFATO TRICÁLCICO PARA USO BIOMÉDICO." In Ciência, Tecnologia e Inovação, 200–212. Antonella Carvalho de Oliveira, 2019. http://dx.doi.org/10.22533/at.ed.25119180222.
Full textConference papers on the topic "FOSFATO TRICÁLCICO"
PEREIRA, T. C. S., G. R. SANTOS, and G. A. FERNANDES. "SÍNTESE DE BETA FOSFATO TRICÁLCICO, POR REAÇÃO DE ESTADO SÓLIDO, PARA USO BIOMÉDICO." In XI Congresso Brasileiro de Engenharia Química em Iniciação Científica. São Paulo: Editora Edgard Blücher, 2015. http://dx.doi.org/10.5151/chemeng-cobeqic2015-286-33163-262461.
Full textPEREIRA, T. C. S., and G. A. FERNANDES. "SÍNTESE E CARCATERIZAÇÃO DE BETA FOSFATO TRICÁLCICO OBTIDO POR MISTURA A SECO EM MOINHO DE ALTA ENERGIA." In XI Congresso Brasileiro de Engenharia Química em Iniciação Científica. São Paulo: Editora Edgard Blücher, 2015. http://dx.doi.org/10.5151/chemeng-cobeqic2015-479-34109-262134.
Full textAlves, Ketelly Estefane Da Silva, José Rosa de Souza Farias, Geysivana Késsya Garcia Carvalho, Ycaro Breno Alves De Almeida, veruska do nascimento simões, and Aluska do Nascimento Simoes Braga. "INFLUÊNCIA DA PROPORÇÃO DE ÁCIDO CÍTRICO E CÁTIONS MÉTALICOS NAS CARACTERÍSTICAS ESTRUTURAIS E MORFOLÓGICAS DO BETA FOSFATO TRICÁLCICO." In Anais do Congresso Brasileiro Interdisciplinar em Ciência e Tecnologia. Recife, Brasil: Even3, 2021. http://dx.doi.org/10.29327/143026.2-25.
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