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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Physical and biological characterizations of TiNbSn/(Mg) system produced by powder metallurgy for use as prostheses material

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Rossi, Mariana Correa [1] ; Bayerlein, Daniel Leal [2, 3] ; Brandao, Jaqueline de Souza [1] ; Hubbe Pfeifer, Joao Pedro [1] ; Rosa, Gustavo dos Santos [1] ; Silva, William de Melo [4] ; Martinez, Luis Gallego [5] ; Saeki, Margarida Juri [6] ; Garcia Alves, Ana Liz [1]
Total Authors: 9
[1] Sao Paulo State Univ, UNESP, Regenerat Med Lab, Dept Vet Surg & Anim Reprod, Sch Vet Med & Anim Sc, Botucatu, SP - Brazil
[2] Nucl & Energy Res Inst IPEN, Mat Sci & Technol Ctr, Sao Paulo, SP - Brazil
[3] Technol Res Inst IPT, Sao Paulo, SP - Brazil
[4] Sao Paulo State Univ, Inst Biotechnol, UNESP, Botucatu, SP - Brazil
[5] Univ Sao Paulo, Nucl & Energy Res Inst, Mat Sci & Technol Ctr, Av Prof Lineu Prestes 2242, Cidade Univ, Sao Paulo, SP - Brazil
[6] Sao Paulo State Univ, Inst Biosci IBB, Dept Chem & Biochem, UNESP, Botucatu, SP - Brazil
Total Affiliations: 6
Document type: Journal article
Web of Science Citations: 0

Titanium scaffolds with non-toxic 1 stabilizing elements (Nb and Sn), Ti-34Nb-65n (TNS), and with magnesium as spacer (TNS/M), were processed by powder metallurgy, and sintered at 800 degrees C. The X-ray diffraction (XRD) pattern showed that materials are biphasic alloys, presenting 45 to 42% (wt %) in hcp (alpha-phase) and the rest is bcc (beta-phase), and the presence of a slight peak relating to TiO2 in both materials. Pores of approximately 50 mu m for TNS and 300 mu m to TNS/M were observed in the micrographic analysis by scanning electron microscopy (SEM). The wettability was higher for TNS/M compared to TNS. The elastic modulus was higher for TNS compared to TNS/M. Stem cells derived from equine bone marrow (BMMSCs) were used for in vitro assays. The morphologic and adhesion evaluation after 72 h, carried out by direct contact assay with the materials showed that the BMMSCs were anchored and adhered to the porous scaffolds, in the way the cytoplasmic extension was observed. The cellular migration, using the ``wound healing{''} method, was significant for the groups treated with conditioned medium with materials in 24 h. Osteogenic differentiation of BMMSCs, assessed by calcium deposition and staining with Alizarin Red, was greater in the conditioned medium with TNS/M in 10 days of culture. Since the biological effects was good and the elastic modulus decreased in the system with magnesium is a promising new content titanium alloy for biomedical application. (AU)

FAPESP's process: 17/13876-2 - Characterization of Ti-Nb-Sn alloy with Mg and its Biotechnological Potential Bone Fracture Repair.
Grantee:Mariana Correa Rossi
Support type: Scholarships in Brazil - Doctorate