Electrochemical Behaviour and Galvanic Effects of Titanium Implants Coupled to Metallic Suprastructures in Artificial Saliva
| Autor: | Virginia Guiñón Pina, Anna Igual Muñoz, Ma Fernanda Solá-Ruiz, Ana Mellado-Valero |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
implant supraestructures Alloy chemistry.chemical_element 02 engineering and technology engineering.material Electrochemistry lcsh:Technology Article Corrosion galvanic corrosion 03 medical and health sciences 0302 clinical medicine Galvanic cell General Materials Science lcsh:Microscopy Dissolution lcsh:QC120-168.85 ion release dental alloys lcsh:QH201-278.5 lcsh:T Metallurgy technology industry and agriculture Titanium alloy 030206 dentistry 021001 nanoscience & nanotechnology equipment and supplies Galvanic corrosion chemistry lcsh:TA1-2040 engineering lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology lcsh:TK1-9971 Titanium |
| Zdroj: | Materials; Volume 11; Issue 1; Pages: 171 Materials Materials, Vol 11, Iss 1, p 171 (2018) |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma11010171 |
| Popis: | The aim of the present study is to analyze the electrochemical behavior of five different dental alloys: two cobalt-chromium alloys (CoCr and CoCr-c), one nickel-chromium-titanium alloy (NiCrTi), one gold-palladium alloy (Au), and one titanium alloy (Ti6Al4V), and the galvanic effect when they are coupled to titanium implants (TiG2). It was carried out by electrochemical techniques (open circuit measurements, potentiodynamic curves and Zero-Resistance Ammetry) in artificial saliva (AS), with and without fluorides in different acidic conditions. The studied alloys are spontaneously passivated, but NiCrTi alloy has a very narrow passive domain and losses its passivity in presence of fluorides, so is not considered as a good option for implant superstructures. Variations of pH from 6.5 to 3 in artificial saliva do not change the electrochemical behavior of Ti, Ti6Al4V, and CoCr alloys, and couples, but when the pH of the artificial saliva is below 3.5 and the fluoride content is 1000 ppm Ti and Ti6Al4V starts actively dissolving, and CoCr-c superstructures coupled to Ti show acceleration of corrosion due to galvanic effects. Thus, NiCrTi is not recommended for implant superstructures because of risk of Ni ion release to the body, and fluorides should be avoided in acidic media because Ti, Ti6Al4V, and CoCr-c superstructures show galvanic corrosion. The best combinations are Ti/Ti6Al4V and Ti/CoCr as alternative of noble gold alloys. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |