da Silva, Jose H. D.
Matos, Adaias O.
Azevedo Neto, Nilton F.
de Almeida, Amanda B.
Nociti Junior, Francisco H.
Leite, Douglas M. G.
Rangel, Elidiane Cipriano
Barao, Valentim A. R.
Total Authors: 9
 Univ Estadual Campinas, Piracicaba Dent Sch, Dept Prosthodont & Periodontol, UNICAMP, Av Limeira 901, BR-13414903 Piracicaba, SP - Brazil
 Inst Biomat Tribocorros & Nanomed IBTN, Rio De Janeiro, RJ - Brazil
 Sao Paulo State Univ UNESP, Sch Sci, Dept Phys, Av Eng Luis Edmundo C Coube 14-01, BR-17033360 Bauru, SP - Brazil
 Technol Inst Aeronaut ITA, Plasma & Proc Lab, Pca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP - Brazil
 Sao Paulo State Univ UNESP, Inst Sci & Technol, Lab Technol Plasmas, Av Tres de Marco 511, BR-18087180 Sorocaba, SP - Brazil
Total Affiliations: 5
Materials Science & Engineering C-Materials for Biological Applications;
Web of Science Citations:
The aim of this study was to tailor the deposition parameters of magnetron sputtering to synthetize tantalum oxide (TaxOy) films onto commercially pure titanium (cpTi) surface. The structural and optical properties, morphology, roughness, elemental chemical composition and surface energy were assessed. The impact of TaxOy films on initial Streptococcus sanguinis adhesion was investigated. The morphology and spreading of pre-osteoblastic (MC3T3-E1) cells on a crystalline tantalum oxide film were evaluated. TaxOy films with estimated thickness of 600 nm and different structures (amorphous or crystalline) were produced depending on the various oxygen flow rates and parameters used. X-ray diffraction analysis revealed that the 8 O-2 sccm (600 degrees C/400 W) group showed crystallization corresponding to the beta-TaxO5 phase. Optical analysis showed that the 4 O-2 sccm (200 degrees C 300 W) to 8 O-2 sccm (600 degrees C 300 W) groups and 10 O-2 sccm (200 degrees C 300 W) group presented regular and large-amplitude interference oscillations, suggesting high optical homogeneity of the films. The crystalline beta-TaxO5 coating showed higher roughness and surface energy values than the other groups (P < .05) and was biocompatible. Compared with cpTi, the amorphous and crystalline tantalum oxide films did not increase bacterial adhesion (P > .05). By tailoring the deposition parameters, we synthetized a crystalline beta-TaxO5 coating that improved titanium surface properties and positively affected cell spreading and morphology, making it a promising surface treatment for titanium-based implants. (AU)