Influence of different surface treatments on the fracture toughness of a commercial ZTA dental ceramic



Título del documento: Influence of different surface treatments on the fracture toughness of a commercial ZTA dental ceramic
Revista: Materials research
Base de datos: PERIÓDICA
Número de sistema: 000312966
ISSN: 1516-1439
Autores: 1

2
Instituciones: 1Universidade Federal do Rio de Janeiro, Centro de Tecnologia, Rio de Janeiro. Brasil
2Universidade Federal do Rio de Janeiro, Rio de Janeiro. Brasil
Año:
Periodo: Ene-Mar
Volumen: 10
Número: 1
Paginación: 63-68
País: Brasil
Idioma: Inglés
Tipo de documento: Nota breve o noticia
Enfoque: Experimental
Resumen en inglés The objective of this study was to investigate how mechanical surface treatments performed for removal of excess of molten glass, influence the fracture toughness of a dental zirconia toughened alumina (In-Ceram® Zirconia). Infiltrated ZTA disks were submitted to three different surface treatments (grinding, sandblasting and grinding + sandblasting + annealing). Fracture toughness was accessed through indentation strength test (IS). X ray diffraction was used to investigate the metastability of tetragonal zirconia particles under all treatments proposed. Kruskall-Wallis non-parametrical test and Weibull statistics were used to analyze the results. Grinding (group 1) introduced defects which decreased the fracture toughness and reliability, presenting the lowest K IC. On the other hand, grinding followed by sandblasting and annealing (group 3) presented the highest K IC. Sandblasting (group 2) presented the highest reliability but lower K IC compared to group 3
Disciplinas: Ingeniería,
Medicina
Palabras clave: Ingeniería de materiales,
Odontología,
Cerámica,
Alúmina,
Circonio,
Prótesis dental,
Propiedades mecánicas
Keyword: Engineering,
Medicine,
Materials engineering,
Dentistry,
Ceramics,
Alumina,
Zirconium,
Dental prosthesis,
Mechanical properties
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