Evaluation of tribological properties of new alumina/zirconia ceramics for dental restoration
- Autores: Célio Figueiredo Pina, Micael Rodrigues, Mafalda Guedes
- Localización: Proceedings of the VIII Iberian Conference on Tribology: Conference proceedings / Ana Eva Jiménez Ballesta (aut.), Tulia Espinosa Rodríguez (aut.), Noelia Saurín Serrano (aut.), Joaquín Arias Pardilla (aut.), María Dolores Bermúdez Olivares (aut.), 2015, ISBN 978-84-606-8904-1, págs. 185-191
- Idioma: inglés
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Resumen
There is great interest in the use of ceramics for dental restoration due aesthetic similarity to natural teeth. Dental applications also demand adequate mechanical and tribological properties. Namely, the restoration material must not wear out easily and must not lead to abnormal enamel wear of the antagonist tooth. In the present work ceramic composites were developed by slip casting of tailored Al2O3/Zr2O formulations containing ZrO2 in the form of submicrometric or of nanoparticles. After sintering sample surface was characterized by scanning electron microscopy and profilometry; hydrophilicity was evaluated using the sessile drop method. Wear behaviour was assessed by reciprocating pin-on-plate tests in artificial saliva, using molar and pre-molar human teeth as pins and samples of the produced materials as cusps. Commercial dental zirconia was used as reference material. High consolidation of composites was attained, with density values ranging from 95.8 %TD to 99.9 ...
