Palabras clave
Microdureza superficial; Resistencia a la compresión; MTA; Silicato de calcio; Nanopartículas; Cemento portland.
Cómo citar
Resumen
Determinar la microdureza superficial de cemento portland blanco asociado a nanopartículas de niobio, cemento portland blanco asociado a nanopartículas de circonio y agregado de trióxido mineral. El presente estudio es un estudio experimental in vitro. La muestra estuvo compuesta por 03 grupos de estudio. Estos se dividieron en 09 subgrupos de 04 horas, 14 días y 28 días. El instrumento utilizado para registrar la microdureza mecánica de la superficie fue el microdurómetro Vickers. Luego se realizó el análisis estadístico Shapiro-Wilk para identificar la normalidad de los datos. Se aplicó la prueba de Anova para comparar entre los tres grupos y luego la prueba de Tukey para comparaciones múltiples con un nivel de confianza del 95%. El cemento Portland blanco asociado a nanopartículas de circonio tuvo el mayor valor de dureza (p<0.05), seguido del cemento Portland blanco asociado a nanopartículas de niobio y el cemento de control de agregados de trióxido mineral. El valor más bajo de microdureza superficial se obtuvo mediante la adición de trióxido mineral (p<0,05). Los valores de microdureza superficial fueron significativamente mayores a los 28 días que a las 04 horas para todos los grupos evaluados. El cemento Portland blanco con/sin aditivos nanoparticulados generó mayor microdureza superficial que el grupo control al que se le añadió trióxido mineral en los periodos de evaluación.
Citas
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