Efecto del curado a alta potencia sobre la contracción de polimerización y la microdureza de las resinas compuestas
DOI:
https://doi.org/10.15517/z21whs73Palabras clave:
Composite resins; Dental curing lights; Dental materials; Hardness tests; Polymerization; Mechanical stress.Resumen
Se sabe que la contracción por polimerización y la microdureza de las resinas compuestas dentales están significativamente influenciadas por el grosorde aplicación y la intensidad lumínica de la unidad de fotocurado. Sin embargo, el efecto específico del modo de fotopolimerización de alta potencia sobre las resinas compuestas no ha sido complemente esclarecido. Este estudio in investigó el efecto del modo de curado utilizando una unidad LED de alta potencia (VALO) en términos de contracción volumétrica y microdureza de resinas compuestas nanohíbridos. SonicFill 3 y OptiShade fueron polimerizadas empleando modos de curado estándar y de alta potencá con el disposivito VALO Cordless. Se prepararon un total de 60 especímenes utilizando moldes de teflón con un diámetro de 8 mm y un grosor de 2 mm y 4 mm. Los valores de microdureza fueron determinados mediante un durómetro Vickers (Innovatest, Maastricht, Holanda). Para la medición de la contracción volumétrica, se prepararon 40 especímenes adicionales de los composites SonicFill 3 y OptiShade, evaluados con un analizador de contracción volumétrica (Acuvol Schaumburg, IL, EE. UU.). Se ha observado que cada uno de los modos de curado afecta a la microdureza de cada material compuesto. En cuanto a la microdureza de los materiales compuestos nanohíbridos, se observaron diferencias signficatives entre los espesores y los mododa de curado con luz (p<0,05). En cuanto a la contracción volumétrica, se midieron diferencias entre los materiales según el modo de curado. El curado de alta potencia para el compuesto de relleno masivo mostró el valor más bajo de contracción por polimerización- El aumento del espesor de la capa tuvo un efecto negativo en la dureza de las resinas compuestas.
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Derechos de autor 2026 Nur Selen Öztürk, Mustafa Demirci, Safa Tuncer, Neslihan Tekçe, Özge Duman Özbilgi.
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