Efecto de protocolos adhesivos en la adaptación marginal y resistencia adhesiva de resina compuesta en accesos endodónticos simulados en restauraciones de circonia (3Y-TZP)
Fecha
2023
Tipo
tesis de maestría
Autores
Barrantes Quesada, Ana Belén
Título de la revista
ISSN de la revista
Título del volumen
Editor
Resumen
El objetivo de la investigación fue evaluar el efecto de protocolos adhesivos en la adaptación
marginal y la resistencia adhesiva de resina compuesta en accesos endodónticos simulados
en restauraciones de circonia (3Y-TZP).
Métodos: cuarenta muestras de circonia de 10x10x1,6mm fueron fabricadas y asignadas
aleatoriamente a 4 grupos experimentales (n:10). Se perforó un orificio de acceso con una
fresa paralela de diamante de 1,6 mm. Los protocolos adhesivos aplicados fueron: monobond
(M), monobond+heliobond (MH), Z-Prime (Z) y Z-Prime+heliobond (ZH). Después de
aplicar cada protocolo adhesivo siguiendo las indicaciones del fabricante, la resina
compuesta se fotopolimerizó según las instrucciones del fabricante (1.000 mW/cm2/10s).
Para evaluar la microfiltración de la interfase resina-circonia, se seleccionó el método de
permeabilidad al gas usando un dispositivo previamente personalizado conocido como
Evaluador Automático de Microfiltración (EMA) (número de patente pendiente 01/2017-
000075). Luego, 80 muestras de óxido de circonia de 10x10x2mm fueron asignadas a 5
grupos experimentales (n:16), y se realizaron orificios de acceso (1,6mm de diámetro)
utilizando la fresa de diamante cónica de 1,6mm. Los protocolos adhesivos utilizados fueron:
control (C), M, MH, Z y ZH. La resina compuesta se fotopolimerizó (1000 mW/cm2/10 s) y
la resistencia de la unión se midió usando una máquina de prueba universal para efectuar la
prueba de push out. Las muestras probadas representativas fueron evaluadas por SEM. Los
datos de resistencia de unión se evaluaron mediante pruebas de ANOVA/Tukey y los datos
de filtración con la prueba de Kruskal-Wallis/sum-rank. La significación estadística se
estableció en α=0,05.
Resultados: los grupos M y MH mostraron valores estadísticamente más altos de
microfiltración (64,310 % y 60,505 % respectivamente) que ZH (0,130 %), mientras que Z
(39,9 %) no resultó significativamente diferente de ningún otro grupo.
En cuanto a los resultados de resistencia adhesiva, los valores más altos los obtuvieron MH
(42,68 ± 7,53), M (37,37 ± 13,09) y ZH (34,95 ± 12,23), mientras que el grupo control mostró
el valor de resistencia adhesiva significativamente más bajo C (25,56 9,27), Z (28,18
8,00) solo mostró un valor de resistencia adhesiva significativamente más bajo que MH
(42,68 7,53).
Se concluye que el uso de ambos primers con MDP aumenta la resistencia adhesiva en
comparación con el grupo control y la aplicación de heliobond mejora aún más la resistencia
adhesiva. La aplicación de Z-Prime seguida de heliobond fue el grupo que logró un mayor
sellado marginal periférico.
The objective of this research was to evaluate the effect of different adhesive protocols on marginal adaptation and bond strength of composite resin in simulated endodontic accesses on zirconia restorations (3Y-TZP). Methods: Forty 10x10x1,6mm zirconia samples were manufactured and randomly assigned to 4 experimental groups (n:10). An access hole was drilled with a 1,6mm parallel diamond bur. The adhesive protocols applied were: monobond (M), monobond+heliobond (MH), ZPrime (Z), and Z-Prime+heliobond (ZH). After each adhesive protocol was applied following the manufacturer’s indications, resin composite was photopolymerized according to manufacturers' instructions (1.000 mW/cm2 /10s). To evaluate the microleakage of the resin-zirconia interface, the gas permeability method was selected using a previously customized device known as the Automatic Microleakage Evaluator (EMA) (pending patent number 01/2017-000075). Then, 80 zirconia samples 10x10x2mm were assigned to 5 experimental groups (n:16), and access holes (1,6mm diameter) were made using the 1,6mm conical diamond bur. The adhesive protocols used were: control (C), M, MH, Z, and ZH. Resin composite was light-cured (1.000 mW/cm2 /10s), and bond strength was measured using a universal testing machine to measure the push-out test. Representative tested samples were evaluated by SEM. Bond strength data were evaluated by ANOVA/Tukey tests, and infiltration data with Kruskal-Wallis/sum-rank test. Statistical significance was established at α=0,05. Results: M and MH groups showed statistically higher values of microleakage (64.310% and 60.505% respectively) than ZH (0.130%), while Z (39.9%) resulted not significantly different from any other group. Regarding bond strength results the highest values were obtained by MH (42,68 7,53), M (37,37 13,09) and ZH (34,95 12,23), while control group showed significant lowest bond strength value C (25,56 9,27), Z (28,18 8,00) only showed a significantly lower bond strength value than MH (42,68 7,53). It is concluded that the use of both primers with MDP increases bond strength compared to the control group and the application of heliobond improves bond strength even more. The application of Z-Prime followed by heliobond was the group that achieved a greater marginal peripheral seal.
The objective of this research was to evaluate the effect of different adhesive protocols on marginal adaptation and bond strength of composite resin in simulated endodontic accesses on zirconia restorations (3Y-TZP). Methods: Forty 10x10x1,6mm zirconia samples were manufactured and randomly assigned to 4 experimental groups (n:10). An access hole was drilled with a 1,6mm parallel diamond bur. The adhesive protocols applied were: monobond (M), monobond+heliobond (MH), ZPrime (Z), and Z-Prime+heliobond (ZH). After each adhesive protocol was applied following the manufacturer’s indications, resin composite was photopolymerized according to manufacturers' instructions (1.000 mW/cm2 /10s). To evaluate the microleakage of the resin-zirconia interface, the gas permeability method was selected using a previously customized device known as the Automatic Microleakage Evaluator (EMA) (pending patent number 01/2017-000075). Then, 80 zirconia samples 10x10x2mm were assigned to 5 experimental groups (n:16), and access holes (1,6mm diameter) were made using the 1,6mm conical diamond bur. The adhesive protocols used were: control (C), M, MH, Z, and ZH. Resin composite was light-cured (1.000 mW/cm2 /10s), and bond strength was measured using a universal testing machine to measure the push-out test. Representative tested samples were evaluated by SEM. Bond strength data were evaluated by ANOVA/Tukey tests, and infiltration data with Kruskal-Wallis/sum-rank test. Statistical significance was established at α=0,05. Results: M and MH groups showed statistically higher values of microleakage (64.310% and 60.505% respectively) than ZH (0.130%), while Z (39.9%) resulted not significantly different from any other group. Regarding bond strength results the highest values were obtained by MH (42,68 7,53), M (37,37 13,09) and ZH (34,95 12,23), while control group showed significant lowest bond strength value C (25,56 9,27), Z (28,18 8,00) only showed a significantly lower bond strength value than MH (42,68 7,53). It is concluded that the use of both primers with MDP increases bond strength compared to the control group and the application of heliobond improves bond strength even more. The application of Z-Prime followed by heliobond was the group that achieved a greater marginal peripheral seal.
Descripción
Palabras clave
POLÍMERO, ADHESIVE, RESTAURACIÓN, ODONTOLOGÍA