Comparison of crystallinity between natural hydroxyapatite and synthetic cp-Ti /HA coatings
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Data
2005-06-01
Autores
Assis, Camila Molena de [UNESP]
Vercik, Luci Cristina de Oliveira [UNESP]
Santos, Márcio Luís dos [UNESP]
Fook, Marcus Vinícius Lia [UNESP]
Guastaldi, Antonio Carlos [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
ABM, ABC, ABPol
Resumo
Commercial purity titanium (cp-Ti), and some of its alloys are important materials in the medical field because of their excellent biocompatibility and mechanical properties. Recently a simple chemical method to induce bioactivity in these inert metallic materials was reported. In this work, the biomimetic chemical process has been used to modify the surface of cp-Ti with the formation of a deposit layer of apatite (a calcium phosphate compound). The main purpose was to study the influence of heat treatment on changes in crystallinity in the deposited phases. X-ray diffraction analysis and scanning electron microscopy showed that the apatite coatings heat treated between 400 and 600 °C were less crystalline, similar to biological apatites. Upon heat treatment at temperatures above 700 °C, the apatite coatings appeared more crystalline, and were a mixture of hydroxyapatite, octacalcium phosphate and magnesium phosphate.
Descrição
Palavras-chave
biomaterials, titanium, biomimetic process, hydroxyapatite
Como citar
Materials Research. ABM, ABC, ABPol, v. 8, n. 2, p. 207-211, 2005.