Efeito do tratamento de superfície na osseointegração de implantes dentários da liga TI-7,5Mo
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Data
2012-01-27
Autores
Oliveira, João Augusto Guedes de [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
Os Biomateriais Metálicos são utilizados para reforçar ou para restaurar a forma e função de tecidos duros. Os implantes e próteses são utilizados para substituir ombros, joelhos, quadris e dentes perdidos entre outros. Nos últimos anos, varias ligas de titânio para aplicações biomédicas foram avaliadas. Neste trabalho, a influência do tratamento de superfície biomimético na osseointegração de implantes dentários da liga Ti-7,5Mo foi avaliada. Os lingotes foram obtidos a partir de titânio e molibdênio utilizando um forno a arco voltaico. Eles foram submetidos a tratamento térmico e conformados a frio em prensa rotativa. Posteriormente foram confeccionados implantes (2,0 mm de diâmetro e 2,5 mm de comprimento) sob medida os quais submetidos ao tratamento de superfície biomimético. Os implantes foram inseridos e analisados histológica realizada após 28 dias. A caracterização microestrutural e mecânica da liga Ti-7,5Mo também foi realizada. Aliga Ti-7,5Mo exibiu baixo modulo de elasticidade e elevada relação resistência/modulo. O uso do tratamento de superfície biomimético promoveu um aumento da osseointegração sobre a superfície dos implantes
Metallic biomaterials are used to reinforce or to restore form and function of hard tissues. Implants and prosthesis are used to replace shoulders, knees, hips and teeth. In the last years, several titanium alloys for biomedical applications have been studied. In the present work, influence of biomimetic surface treatment in osseointegration of Ti-7.5Mo dental implant was evaluated. Ingots were obtained from titanium and molybdenum by using an arc-melting furnace. They were submitted to heat treatment and cold worked by swaging. Then, screw-shaped implants (2.0 mm diameter by 2.5 mm length) were custom made and they were submitted biomimetic surface treatment. Implants were implanted in the rat’s femur and histological analysis was realized after 28 days. Also, microstructural and mechanical properties of Ti-7.5Mo alloy were evaluated. Ti-7.5Mo showed low elasticity modulus and higher ratio strength/modulus. Results obtained suggest that Ti-7.5Mo exhibited excellent bulk properties. The use of the biomimetic surface treatment was able to promote an increase of osseointegration on surface of dental implants
Metallic biomaterials are used to reinforce or to restore form and function of hard tissues. Implants and prosthesis are used to replace shoulders, knees, hips and teeth. In the last years, several titanium alloys for biomedical applications have been studied. In the present work, influence of biomimetic surface treatment in osseointegration of Ti-7.5Mo dental implant was evaluated. Ingots were obtained from titanium and molybdenum by using an arc-melting furnace. They were submitted to heat treatment and cold worked by swaging. Then, screw-shaped implants (2.0 mm diameter by 2.5 mm length) were custom made and they were submitted biomimetic surface treatment. Implants were implanted in the rat’s femur and histological analysis was realized after 28 days. Also, microstructural and mechanical properties of Ti-7.5Mo alloy were evaluated. Ti-7.5Mo showed low elasticity modulus and higher ratio strength/modulus. Results obtained suggest that Ti-7.5Mo exhibited excellent bulk properties. The use of the biomimetic surface treatment was able to promote an increase of osseointegration on surface of dental implants
Descrição
Palavras-chave
Implantes dentários osseointegrados, Osseointegração, Materiais biomédicos, Bioengenharia, Ligas de titanio, Metalurgia odontologica, Implantes dentários, Biomimetic surface treatment
Como citar
OLIVEIRA, João Augusto Guedes de. Efeito do tratamento de superfície na osseointegração de implantes dentários da liga TI-7,5Mo. 2012. 77 p. Tese (doutorado) – Universidade Estadual Paulista, Faculdade de Engenharia de Guaratinguetá, 2012.