Sistema de fabrico rápido de implantes ortopédicos

Relvas, C.; Reis, Joana; Potes, J.; Fonseca, Fernando; Simões, J. A.

doi:10.1590/s0102-36162009000300013

Cited by 3 publications

References 19 publications

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Facile Synthesis of TiO₂–SiO₂–P₂O₅/CaO/ZnO with a Core–Shell Structure for Bone Implantation

et al. 2022

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A facile synthesis method was developed to synthesize TiO 2 −SiO 2 −P 2 O 5 /CaO or TiO 2 −SiO 2 −P 2 O 5 /ZnO with a core−shell structure. The carboxylic cation exchanger Tokem-250 has a high selectivity for Ca 2+ /Zn 2+ ions and was used in this study. The framework of the material in the shell was TiO 2 −SiO 2 −P 2 O 5 , and the inner part was filled with CaO (sample TiO 2 −SiO 2 /CaO) or ZnO (sample TiO 2 −SiO 2 − P 2 O 5 /ZnO). A stepwise heat treatment (drying in a drying oven at 60 °C for 30 min, then annealing in a muffle furnace for 30 min at 150, 250, and 350 °C, at 600 °C for 6 h, and at 800 °C for 1 h) was needed to obtain a homogeneous material. The poly(vinyl alcohol) was used as a binding additive. The obtained composites were characterized by a regular structure and highly developed surface. The samples exhibit bioactive properties in the simulated body fluid (SBF) solution, since the surface contains active centers (Si 4+ , Ti 4+ ) which contribute to mineralization and precipitation of the calcium-phosphate compounds on the surface from biological media. The TiO 2 −SiO 2 −P 2 O 5 / CaO-PVA samples did not exceed acceptable hemolysis levels for medical materials.

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