Análise química da composição superficial de minimplantes e adesão de osteoblastos
Ricardo Carvalho Bueno.
Tese
por
D762
2014.
80 f. : il.
Tese (Doutorado em Implantodontia) - Centro de Pesquisas Odontológicas São Leopoldo Mandic, Campinas - SP.
O presente estudo teve como objetivos avaliar: a) a composição química da superfície de duas marcas comerciais de minimplantes utilizados em Ortodontia e o índice destes componentes encontrados; b) a proliferação e morfologia de osteoblastos humanos em cultura sobre as duas marcas de minimplantes...
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O presente estudo teve como objetivos avaliar: a) a composição química da superfície de duas marcas comerciais de minimplantes utilizados em Ortodontia e o índice destes componentes encontrados; b) a proliferação e morfologia de osteoblastos humanos em cultura sobre as duas marcas de minimplantes nos tempos 24, 48 e 72 horas. Foram avaliadas duas marcas comerciais de minimplantes (Morelli e Neodent); poliestireno foi utilizado como grupo controle (n=3). Para as análises químicas dos minimplantes (n=2), utilizou-se espectroscopia de fluorescência de Raios-X para a identificação e quantificação dos componentes químicos. Para a avaliação da proliferação celular, foram utilizadas linhagens de osteoblastos humanos. Os minimplantes foram dispostos horizontalmente e estabilizados por uma matriz metálica, sendo este conjunto esterilizado. A seguir, as células foram cultivadas em placas na estufa de CO2 a 37ºC, em diferentes tempos (24, 48 e 72 horas). O crescimento celular de osteoblastos foi quantificado e avaliado em microscopia eletrônica de varredura, utilizando aumento de 30, 50, 500, 2500 e de até 5000 vezes, sendo as imagens observadas e analisadas por um único observador. Com relação à análise química, verificaram-se que os elementos mais presentes em ambas as marcas de minimplantes analisadas foram o alumínio (Al), o vanádio (V) o ferro (Fe) e o titânio (Ti). Os minimplantes que apresentaram maior quantidade de titânio, em ordem decrescente, foram o da Morelli amostra 2 (88,37%), Morelli amostra 1 (87,73%), Neodent amostra 2 (87,93%) e Neodent amostra 1 (87,92%). Quanto à adesão celular, a análise de variância a dois critérios demonstrou ausência de interação significativa entre os fatores em estudo (p = 0,686). Para todos os tempos avaliados, o teste de Tukey indicou que não houve diferença significativa na proliferação de osteoblastos sobre os minimplantes Morelli e Neodent; porém, apenas para esta última marca comercial, a proliferação não diferiu significativamente daquela verificada sobre o poliestireno, utilizado como controle (p = 0,025). Para qualquer das superfícies avaliadas (minimplantes ou poliestireno), o tempo apresentou influência de forma direta e positiva sobre a proliferação de osteoblastos (p < 0,001). Pode-se concluir que, quanto à composição química, não se observaram diferenças entre as marcas comerciais avaliadas. Houve proliferação de osteoblastos sobre os minimplantes, com aumento em função do tempo, mas sem diferenças significativas entre as marcas comerciais.
Palavras-chave: Minimplantes. Análise química. Osseointegração.
The present study aimed to evaluate: a) the chemical composition of the surface of two commercial minimplants used in orthodontics and the ratio of these components found; b) the proliferation and morphology of human osteoblasts cultured on the two brands of minimplants times in 24 , 48 and 72 hours. Two trademarks of minimplants (Morelli and Neodent) were evaluated; polystyrene was used as a control group (n=3). For Chemical analysis of minimplants (n = 2), spectroscopy X-ray fluorescence were used for the identification and quantification of chemical components. For the evaluation of cell proliferation, strains of human osteoblasts were used. The minimplants were arranged horizontally and stabilized by a metal matrix, this set being sterilized. Next, the cells were cultured in the CO2 incubator plate at 37°C at different times (24, 48 and 72 hours). Cell growth of osteoblasts was quantified and evaluated by scanning electron microscopy using up 30, 50, 500, 2500 and up to 5000 times, and the images were observed and analyzed by a single observer. With regard to the chemical analysis, it was found that most of the elements present in both tags analyzed were minimplants aluminum (Al), vanadium (V) iron (Fe) and titanium (Ti). The minimplants showed a higher content of titanium, in descending order, were the Morelli sample 2 (88.37%), Morelli sample 1 (87.73 %), Neodent sample 2 (87.93%) and Neodent sample 1 (87.92%). As for cell adhesion, the analysis of variance two criteria showed no significant interaction between the factors studied (p = 0.686). For all time periods studied, the Tukey test indicated no significant difference in the proliferation of osteoblasts on Morelli and Neodent minimplants; however, only for the latter trademark, proliferation was not significantly different from those found on polystyrene, used as controls (p = 0.025). For any of the evaluated areas (minimplants or polystyrene), time show direct and positive effect on osteoblast proliferation (p < 0.001). It can be concluded that, with respect to chemical composition, no notable differences between the observed trademarks evaluated. There was proliferation of osteoblasts on the minimplants, increasing as a function of time, but no significant differences between trademarks.
Keywords: Minimplantes. Chemical analysis. Osseointegration. Ver menos
Palavras-chave: Minimplantes. Análise química. Osseointegração.
The present study aimed to evaluate: a) the chemical composition of the surface of two commercial minimplants used in orthodontics and the ratio of these components found; b) the proliferation and morphology of human osteoblasts cultured on the two brands of minimplants times in 24 , 48 and 72 hours. Two trademarks of minimplants (Morelli and Neodent) were evaluated; polystyrene was used as a control group (n=3). For Chemical analysis of minimplants (n = 2), spectroscopy X-ray fluorescence were used for the identification and quantification of chemical components. For the evaluation of cell proliferation, strains of human osteoblasts were used. The minimplants were arranged horizontally and stabilized by a metal matrix, this set being sterilized. Next, the cells were cultured in the CO2 incubator plate at 37°C at different times (24, 48 and 72 hours). Cell growth of osteoblasts was quantified and evaluated by scanning electron microscopy using up 30, 50, 500, 2500 and up to 5000 times, and the images were observed and analyzed by a single observer. With regard to the chemical analysis, it was found that most of the elements present in both tags analyzed were minimplants aluminum (Al), vanadium (V) iron (Fe) and titanium (Ti). The minimplants showed a higher content of titanium, in descending order, were the Morelli sample 2 (88.37%), Morelli sample 1 (87.73 %), Neodent sample 2 (87.93%) and Neodent sample 1 (87.92%). As for cell adhesion, the analysis of variance two criteria showed no significant interaction between the factors studied (p = 0.686). For all time periods studied, the Tukey test indicated no significant difference in the proliferation of osteoblasts on Morelli and Neodent minimplants; however, only for the latter trademark, proliferation was not significantly different from those found on polystyrene, used as controls (p = 0.025). For any of the evaluated areas (minimplants or polystyrene), time show direct and positive effect on osteoblast proliferation (p < 0.001). It can be concluded that, with respect to chemical composition, no notable differences between the observed trademarks evaluated. There was proliferation of osteoblasts on the minimplants, increasing as a function of time, but no significant differences between trademarks.
Keywords: Minimplantes. Chemical analysis. Osseointegration. Ver menos
Análise química da composição superficial de minimplantes e adesão de osteoblastos
Ricardo Carvalho Bueno.
Análise química da composição superficial de minimplantes e adesão de osteoblastos
Ricardo Carvalho Bueno.
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