Influence of grinding/polishing on the mechanical, phase stability and cell adhesion properties of yttria-stabilized zirconia
The changes in mechanical properties, hydrothermal degradation and cell adhesion were studied in 3Y-TZP under two different superficial modification patterns (uni- and multidirectional) with a surface roughness ranging from 16 to 603 nm. In this sense, mechanical properties (i.e. hardness, indentati...
| Autores: | , , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2020 |
| País: | España |
| Recursos: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/327599 |
| Acesso em linha: | https://hdl.handle.net/2117/327599 https://dx.doi.org/10.1016/j.jeurceramsoc.2020.03.049 |
| Access Level: | acceso abierto |
| Palavra-chave: | Materials -- Mechanical properties Zirconia Grinding Mechanical properties Hydrothermal degradation Cell adhesion Zirconi Materials -- Propietats mecàniques Àrees temàtiques de la UPC::Enginyeria biomèdica::Biomaterials::Ceràmica en la medicina |
| Resumo: | The changes in mechanical properties, hydrothermal degradation and cell adhesion were studied in 3Y-TZP under two different superficial modification patterns (uni- and multidirectional) with a surface roughness ranging from 16 to 603 nm. In this sense, mechanical properties (i.e. hardness, indentation fracture toughness and scratch) and accelerated tests in water steam were measured to evaluate the influence of the surface treatments on the superficially modified layer. Moreover, a detailed characterization through micro-Raman spectroscopy and X-Ray diffraction was performed. Finally, SaOS-2 osteoblasts were used for the evaluation of the cell adhesion behaviour on the surfaces. Overall, ground/polished specimens increased the mechanical properties and ageing resistance of mirror-like polished specimens, although resistance to degradation was maximum at intermediate conditions (Sa ˜ 40-180 nm). The studied surfaces allowed cell attachment, but promoted contact guidance (i.e. cell alignment) only on unidirectionally ground surfaces above Sa = 150 nm. |
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