Análisis de adhesión de restuaraciones basada en la combinación de vidrio ionómero y resina compuesta
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Fecha
2013
Autores
Profesor/a Guía
Facultad/escuela
Idioma
es
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Universidad Andrés Bello
Nombre de Curso
Licencia CC
Licencia CC
Resumen
La operatoria es un tratamiento frecuente en nuestra profesión y las restauraciones de
diseños cavitarios profundos son nuestros mayores desafíos.
Objetivo: Evaluar la fuerza de adhesión en cada zona adhesiva de una terapia
restauradora basada en la reconstrucción de dentina con cemento vidrio ionómero y del
esmalte con resina compuesta.
Materiales y métodos: En este estudio experimental, in vitre, no controlado, se
necesitaron 30 molares sanos, previo consentimiento del paciente, para preparar un
total de 120 muestras para 3 grupos de estudio: resina compuesta (Re) - esmalte, vidrio
ionómero (VI)- resina compuesta, vidrio ionómero - dentina; evaluados al día (24
horas) y a los 15 días posteriores a la polimerización de los materiales, conservadas en
humedad relativa, en ausencia de luz, a temperatura ambiente hasta la realización de
las pruebas de microtracción. Los resultados fueron calculados en Mpa y las pruebas
estadísticas utilizadas fueron: T-Student y Test Mann Whitney, utilizando el nivel de
significancia del 5% (P valor = 0.05).
Resultado: Sólo Re/esmalte y Vi/Re presentaron un aumento de resistencia a la
tracción entre 24 horas y 15 días posteriores a la polimerización de los materiales.
Además se encontró que el grupo VI/Re disminuyó significativamente su sitio de
fractura en VI a los 15 días posterior a la polimerización y que la mayor incidencia de
sitios fracturas estuvo en la zona adhesiva entre VI y dentina entre 24 horas y 15 días
posteriores a la polimerización de los materiales.
Conclusión: Sólo Re/esmalte y Vi/Re presentaron un aumento significativo de la
adhesión en el tiempo. En la incidencia de los sitios de fractura sólo VI/Re experimentó
un aumento significativo de la adhesión en zona cohesiva del VI y la mayor incidencia
estuvo localizada en la zona adhesiva del VI y la dentina.
Surgical treatment is frequent in our profession and deep cavitary design restorations are our major challenges. Objective: Evaluate the adhesion strength, on each adhesive zone, on a restorative therapy based on the dentin reconstruction with glass ionomer cement and enamel with composite resin. Methods and Materials: In this experimental study, in vitro, not controlled, 30 healthy molars were taken, previous consent of patients, to complete a total of 120 samples for 3 study groups: composite resin (Re) - enamel, ionomer glass (VI) - composite resin, ionomer glass - dentin; evaluated to the day (24 hours) and 15 days after the material polymerization, preserved in relative humidity, with absence of light and at room temperature until performing microtensile testing. The results were calculated in Mpa and the statistical tests utilized were: T - Student and Mann Whitney Test, using the significance level of 5% (p value = 0.05). Results: Only Rc/enamel and Vi/Re presented an increased tensile strength between 24 hours and 15 following days after the material polymerization. lt was also found that Vi/Re group decreased significantly the fracture region on Vi at the 15 days behind the polymerization and that the major incidence on fracture regions was at the interface between Vi and dentin, at 24 hours and 15 days after material polymerization. Conclusion: Only Rc/enamel and Vi/Re presented a significant increase of adhesion over time. In the incidence of fracture regions, only Vi/Re experienced a significant increase on adhesion in the cohesive zone of Vi and the highest incidence was located at the interface of Vi and dentin.
Surgical treatment is frequent in our profession and deep cavitary design restorations are our major challenges. Objective: Evaluate the adhesion strength, on each adhesive zone, on a restorative therapy based on the dentin reconstruction with glass ionomer cement and enamel with composite resin. Methods and Materials: In this experimental study, in vitro, not controlled, 30 healthy molars were taken, previous consent of patients, to complete a total of 120 samples for 3 study groups: composite resin (Re) - enamel, ionomer glass (VI) - composite resin, ionomer glass - dentin; evaluated to the day (24 hours) and 15 days after the material polymerization, preserved in relative humidity, with absence of light and at room temperature until performing microtensile testing. The results were calculated in Mpa and the statistical tests utilized were: T - Student and Mann Whitney Test, using the significance level of 5% (p value = 0.05). Results: Only Rc/enamel and Vi/Re presented an increased tensile strength between 24 hours and 15 following days after the material polymerization. lt was also found that Vi/Re group decreased significantly the fracture region on Vi at the 15 days behind the polymerization and that the major incidence on fracture regions was at the interface between Vi and dentin, at 24 hours and 15 days after material polymerization. Conclusion: Only Rc/enamel and Vi/Re presented a significant increase of adhesion over time. In the incidence of fracture regions, only Vi/Re experienced a significant increase on adhesion in the cohesive zone of Vi and the highest incidence was located at the interface of Vi and dentin.
Notas
Tesis (Cirujano Dentista, Especialización en Internado Clínico)
Palabras clave
Materiales Dentales, Adhesivos Dentales, Vidrio ionómero, Resina compuesta, Técnica sándwich, Chile