Evaluación de la capacidad de sellado de MTA, IV y OZE en retrobturación apical

Valentina Dones

doi:10.31984/oactiva.v5i1.443

Autores/as

Valentina Dones

DOI:

https://doi.org/10.31984/oactiva.v5i1.443

Resumen

En el presente trabajo, se evaluó la capacidad de sellado del mineral de trióxido agregado (MTA), ionómero vitreo (IV) y oxido zinc eugenol (OZE) en retrobturaciones apicales. Cien piezas dentales unirradiculares, fueron divididas en 5 grupos (n=20): 1- control positivo, ápice sin sellar; 2-control negativo, ápice impermeabilizado con esmalte de uñas; 3- retrobturado con MTA; 4- retrobturado con OZE; 5- retrobturado con IV. Al finalizar los tratamientos ex vivo, las piezas fueron sometidas a la prueba de penetración de tinte, mediante sumersión en azul de metileno 2% durante 48 hs. A continuación, se realizó un corte transversal a 1 mm del extremo apical y se midió el porcentaje de tinción como medida de la capacidad de sellado de los materiales de obturación empleados. Los resultados fueron analizados con la prueba de Kruskal-Wallis, seguida por comparaciones de a pares. El porcentaje de tinción no difirió significativamente entre los tratamientos con MTA e IV, pero éstos mostraron un porcentaje significativamente menor con respecto al tratamiento con OZE. Además, no se encontraron diferencias significativas entre el tratamiento con OZE y el control positivo. Estos resultados demuestran que el IV y el MTA tienen similar capacidad de sellado en retrobturación in vitro, y que a su vez, constituyen mejores selladores que el OZE, que no demostró ser un sellador efectivo, al menos en las condiciones estudiadas.

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