Efecto de la fibra de polietileno colocada en la capa de sellado dentinal inmediato en propiedades mecánicas de piezas dentales, con restauraciones adhesivas indirectas
Cargando...
Archivos
Fecha
2022
Director
Título de la revista
ISSN de la revista
Título del volumen
Publicador
Páginas
Resumen
Objetivo: Evaluar el efecto del uso de la fibra de polietileno colocada sobre la interfase adhesiva en las propiedades mecánicas de piezas dentales con restauraciones adhesivas indirectas resinosas de cobertura parcial. Metodología: Terceros molares intactos (n=20) fueron seccionados transversalmente a nivel coronal para exponer esmalte y dentina. Todos los especímenes recibieron el mismo tratamiento adhesivo que consistió en el grabado selectivo, sellado dentinal inmediato utilizando el adhesivo SE Bond Protect (Kuraray), y la colocación de una capa de resina fluida (Majesty Flow, Kuraray) de 0.5 mm. Se establecieron dos grupos experimentales: el grupo 1 (n=10) o grupo control y el grupo 2, al cual se le colocó una fibra de polietileno de alto peso molecular (Ribbond THM, Ribbond) sobre la capa de resina fluida. Se fabricaron restauraciones indirectas de resina (FORMA, Ultradent) para cada espécimen y se cementaron con resina condensable fotopolimerizable termoplastificada. La resistencia a la fractura y el módulo de elasticidad de cada espécimen se determinaron con una máquina universal de pruebas (ElectroPuls E3000, Instron). Para ambos sets de datos, se comprobaron la normalidad y homocedasticidad con los tests de Anderson-Darling y Bartlett. Se determinó si había diferencia entre los grupos con el test de T. Además se determinaron los parámetros de Weibull para cada grupo. El tipo de fractura de cada espécimen se clasificó con la ayuda de fotografías digitales de alta resolución y un estereoscopio electrónico. Resultados: En cuanto a resistencia a la fractura, el grupo 1 mostró una media numéricamente mayor (3010+/-937 N) respecto al grupo 2 (2868+/-534 N). El grupo 2 mostró una distribución de Weibull más favorable que el grupo 1. Sin embargo, estas diferencias resultaron no ser estadísticamente significativas. Se observó un mayor número de fracturas reparables en...
Inglés: Objective: To evaluate the effect of the use of polyethylene fiber placed over the adhesive interphase on the mechanical properties of teeth with indirect adhesive partial coverage composite restorations. Methods: Intact third molars (n=20) were sectioned coronally to expose enamel and dentin. All specimens underwent adhesive treatment consisting of selective etching, immediate dentin sealing using SE Bond Protect adhesive (Kuraray), and placement of a 0.5-mm layer of flowable resin composite (Majesty Flow, Kuraray). Two experimental groups were established. Group 1 (n=10) was used as the control group. Group 2 received placement of high molecular weight polyethylene fiber (Ribbond THM, Ribbond) over the flowable resin composite layer. Indirect resin composite restorations (FORMA, Ultradent) were manufactured for each specimen and cemented with heated resin composite. The fracture resistance and modulus of elasticity of each specimen was determined using a universal test machine (ElectroPuls E3000, Instron). For both datasets, normality and homoscedasticity were checked using the Anderson-Darling and Bartlett tests. Statistical difference between groups was determined with the T-test. Additionally, Weibull parameters were established for each group. The fracture mode of each sample was classified with the help of high- resolution digital photography and an electronic stereoscope. Results: In regard to fracture resistance, Group 1 showed a numerically higher mean (3010+/-937 N) than Group 2 (2868+/-534 N). Group 2 showed a more favorable Weibull distribution than Group 1. However, the observed differences were not statistically significant. A higher percentage of repairable fractures were observed in Group 2 (70%) compared to Group 1 (40%). Conclusion: The placement of high molecular weight polyethylene fibers over the adhesive interphase did not improve the fracture resistance of teeth with...
Inglés: Objective: To evaluate the effect of the use of polyethylene fiber placed over the adhesive interphase on the mechanical properties of teeth with indirect adhesive partial coverage composite restorations. Methods: Intact third molars (n=20) were sectioned coronally to expose enamel and dentin. All specimens underwent adhesive treatment consisting of selective etching, immediate dentin sealing using SE Bond Protect adhesive (Kuraray), and placement of a 0.5-mm layer of flowable resin composite (Majesty Flow, Kuraray). Two experimental groups were established. Group 1 (n=10) was used as the control group. Group 2 received placement of high molecular weight polyethylene fiber (Ribbond THM, Ribbond) over the flowable resin composite layer. Indirect resin composite restorations (FORMA, Ultradent) were manufactured for each specimen and cemented with heated resin composite. The fracture resistance and modulus of elasticity of each specimen was determined using a universal test machine (ElectroPuls E3000, Instron). For both datasets, normality and homoscedasticity were checked using the Anderson-Darling and Bartlett tests. Statistical difference between groups was determined with the T-test. Additionally, Weibull parameters were established for each group. The fracture mode of each sample was classified with the help of high- resolution digital photography and an electronic stereoscope. Results: In regard to fracture resistance, Group 1 showed a numerically higher mean (3010+/-937 N) than Group 2 (2868+/-534 N). Group 2 showed a more favorable Weibull distribution than Group 1. However, the observed differences were not statistically significant. A higher percentage of repairable fractures were observed in Group 2 (70%) compared to Group 1 (40%). Conclusion: The placement of high molecular weight polyethylene fibers over the adhesive interphase did not improve the fracture resistance of teeth with...
Descripción
Seminario de graduación (licenciatura en odontología)--Universidad de Costa Rica. Facultad de Odontología, 2022
Palabras clave
ADHESIVOS DENTALES - EVALUACION, EMPASTES (ODONTOLOGIA) - EVALUACION, MATERIALES DENTALES - PRUEBAS, POLIETILENO - EVALUACION, RESINAS DENTALES - EVALUACION