| Grant number: | 14/23575-1 |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |
| Start date: | May 01, 2015 |
| End date: | April 30, 2016 |
| Field of knowledge: | Health Sciences - Dentistry - Oral and Maxillofacial Surgery |
| Principal Investigator: | Leonardo Perez Faverani |
| Grantee: | Bruna Regina Gomes Morais |
| Host Institution: | Faculdade de Odontologia (FOA). Universidade Estadual Paulista (UNESP). Campus de Araçatuba. Araçatuba , SP, Brazil |
Abstract The aim of this in vitro study will be to evaluate the corrosive and microstructural behavior of Ti-Zr alloy with or without surface treatment. The hypothesis to be tested is that the surface treatment (double acid etching) and the test alloy (Ti-5Zr, Ti-10Zr and Ti-15Zr) will create a pattern of corrosion different from those observed on machined-surface and other alloys tested (cpTi and Ti-6Al-4V). For electrochemical test (n=3) 48 discs of cpTi, Ti-6Al-4V, Ti-5Zr, Ti-10Zr and Ti-15Zr will be fabricate and submitted to pattern tests as open circuit potential, electrochemical impedance spectroscopy (EIS) and potenciodynamic tests will be conducted in simulated body fluid (SBF) or artificial saliva. The corrosion current density (Icorr), the passivation current density (Ipass), corrosion potential (Ecorr), capacitance (Cdl) and polarization resistance (Rq) of Ti oxide layer will be determined. The surface of the discs will be characterized by scanning electron microscope (SEM), white-light interferometry, energy dispersive spectroscope (EDS) and Vickers hardness. The energy dispersive spectroscope (EDS) will evaluate the composition of oxides created on the Ti surface. The data will be submitted to the appropriated statistical analysis with 5% of significance. | |
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