Estudio comparativo in-vitro sobre microfiltración marginal en restauraciones de composite utilizando o no selladores de alta penetración
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Archivos
Fecha
2012
Autores
Profesor/a Guía
Facultad/escuela
Idioma
es
Título de la revista
ISSN de la revista
Título del volumen
Editor
Universidad Andrés Bello
Nombre de Curso
Licencia CC
Licencia CC
Resumen
Los selladores o agentes de superficie son ligeros materiales polimerizables que
presentan una mayor fluidez y capacidad de penetración. Estos materiales se han
utilizado para disminuir la microfiltración, por su capacidad de penetrar en los espacios
libres en la interfaz diente/restauración.
El objetivo de este estudio es determinar el nivel de microfiltración de una
restauración de composite utilizando o no selladores de composite de alta penetración y
comparar los valores de ambos grupos utilizando método estadístico "t" de Students.
Se utilizaron 40 premolares divididos en dos grupos al azar. A ambos grupos se
le efectuó una cavidad de resina clase de Black de 2 mm de largo y 3 mm de ancho y
profundidad. Posteriormente se obturaron con resina compuesta (Filtek Z 250, 3M
ESPE), Grupo 1 (experimental): En la interfase esmalte/composite se efectuó grabado
ácido y se aplicó sellador de composite (PermaSeal®) en los márgenes grabados. Grupo 2: Grupo Control
Posteriormente las piezas fueron sometidas a termociclado de 500 ciclos. Las
muestras fueron sumergidas en azul de metileno al 2% durante 24 horas. Las coronas
fueron seccionadas longitudinalmente. Finalmente, las muestras se observaron en un
microscopio óptico de luz incidente (10x) utilizando un programa computacional.
Se obtuvo diferencias estadísticamente significativas entre ambos grupos, donde
en el grupo experimental sólo 2 (10%) presentaron algún grado de microfiltración 11 (55%) presentaron esta
(promedio 0,5 mm), en cambio en el grupo control condición (promedio 1,05 mm).
De acuerdo a los resultados obtenidos, se concluye que los selladores de
composite de alta penetración disminuyen el grado de microfiltración marginal en
restauraciones de composite clase I.
Sealants or surface agents are light polymerizable materials with greater fluidity and penetration. These materials have been used to reduce microleakage because of their ability to permeate gaps in the tooth/restoration interface. The objective of this research is to determine the microleakage level of a composite restoration with or without using high-penetration composite sealer and compare both group's values by using the Student's t-distribution. Forty premolars were used. They were randomly divided into two groups. Both groups received a 2 mm length, 3 mm width and depth Black type resin cavity. Subsequently, they were filled with composite resin (Filtek Z250 ESPE). First group (experimental): An acid etching was done in the composite/enamel interface and a composite sealer (PermaSeal®) was placed on etching margins. Second group: Control group Afterwards, dental pieces were thermocycled for 500 cycles. During 24 hours, samples were placed on a 2% methylene blue solution. Crowns were longitudinally dissected. Finally, using software, samples were observed by a reflected light 10X microscope. Significant differences between both groups were obtained. In the experimental group, two of them (10%) showed some degree of microleakage (0.5 mm average). On the other hand, in the control group, eleven of them (55%) showed this condition (1.05 mm average). According to the obtained results, it is conclude that high-penetration composite sealer reduce marginal microleakage in type I composite restorations,
Sealants or surface agents are light polymerizable materials with greater fluidity and penetration. These materials have been used to reduce microleakage because of their ability to permeate gaps in the tooth/restoration interface. The objective of this research is to determine the microleakage level of a composite restoration with or without using high-penetration composite sealer and compare both group's values by using the Student's t-distribution. Forty premolars were used. They were randomly divided into two groups. Both groups received a 2 mm length, 3 mm width and depth Black type resin cavity. Subsequently, they were filled with composite resin (Filtek Z250 ESPE). First group (experimental): An acid etching was done in the composite/enamel interface and a composite sealer (PermaSeal®) was placed on etching margins. Second group: Control group Afterwards, dental pieces were thermocycled for 500 cycles. During 24 hours, samples were placed on a 2% methylene blue solution. Crowns were longitudinally dissected. Finally, using software, samples were observed by a reflected light 10X microscope. Significant differences between both groups were obtained. In the experimental group, two of them (10%) showed some degree of microleakage (0.5 mm average). On the other hand, in the control group, eleven of them (55%) showed this condition (1.05 mm average). According to the obtained results, it is conclude that high-penetration composite sealer reduce marginal microleakage in type I composite restorations,
Notas
Tesis (Cirujano Dentista, Especialización en Clínica Integral del Adulto)
Palabras clave
Materiales Dentales, Restauración Dental Permanente, Sellante de Composite, Microfiltración