Estudio comparativo de la resistencia de unión de un adhesivo universal entre el protocolo sugerido por el fabricante y un protocolo experimental
Date
2021
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Journal Title
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Publisher
Universidad Finis Terrae (Chile) Facultad de Odontología
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Abstract
La odontología adhesiva se basa en la eficacia de los sistemas adhesivos existentes
en el mercado, los cuales corresponden a un punto crítico dentro de los protocolos
de las restauraciones estéticas. Estos poseen variadas indicaciones dadas por los
fabricantes, las que no son concordantes con múltiples estudios clínicos, debido a
que estas no garantizan el máximo rendimiento adhesivo, durabilidad y resistencia
para la obtención de tratamientos de resina compuesta más predecibles en el
tiempo.
Dentro de los sistemas adhesivos se pueden encontrar diferentes clasificaciones,
una de ellas son los adhesivos universales o multimodo, cuyos protocolos adhesivos
han sido ampliamente estudiados. Es por esto que se plantea la siguiente
interrogante, ¿Se puede lograr a través de un protocolo experimental maximizar la
fuerza adhesiva en un adhesivo universal comparado con las indicaciones del
fabricante?
La relevancia de este estudio de investigación es obtener un protocolo clínico
estandarizado del adhesivo Scotchbond Universal 3M ®, que aporte en el desarrollo
de las prácticas clínicas, para garantizar un mejor rendimiento y durabilidad de las
restauraciones adhesivas.
Objetivo: Comparar valores de resistencia de unión adhesiva obtenidos al realizar
el protocolo del fabricante versus protocolo experimental.
Material y método: 36 piezas dentales permanentes (premolares), obtenidas
mediante donaciones voluntarias realizadas por estudiantes de la Universidad Finis
Terrae, quienes las reclutaron en los años 2018 y 2019. Se evaluaron 4 variables
independientes: tiempo de aplicación, número de capas, tiempo de evaporación del
solvente y tiempo de polimerización. Para su aplicación se contó con un grupo
control correspondiente a las indicaciones del fabricante del adhesivo Universal
Scotchbond 3M ® y un grupo experimental con pasos operatorios del protocolo
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experimental, el cual contenía modificaciones en cada variable a evaluar. Este
último se dividió en 5 subgrupos, en 4 de ellos se modificó una respectiva variable
y 1 que incluyó la modificación de todas las variables.
Es por esto que se utilizaron 6 grupos de 6 dientes cada uno, generando así el total
de 36 muestras dentarias, en las cuales se puso a prueba la variable dependiente,
correspondiente a la resistencia adhesiva a fuerzas de cizallamiento, cuyos valores
fueron entregados por la máquina de ensayos universal marca Bisco ®.
A cada diente se le quitaron los restos orgánicos con ultrasonido (scaler) y fueron
cortados con disco diamantado en 4 trozos, para que se expusiera la superficie
dentinaria y poder probar las variables mencionadas.
Resultados: Todas las variaciones del protocolo presentaron valores de resistencia
de unión estadísticamente mayores comparados con el control (Grupo 1), excepto
el grupo 3 (aplicación del número de capas). La combinación de todas las
variaciones del protocolo (grupo 6) mostró los mejores valores de resistencia de
unión.
Conclusiones: Los valores de resistencia al micro cizallamiento que se obtuvieron
al aplicar un protocolo experimental del adhesivo universal Scotchbond 3M ®, en
las muestras dentinarias, fueron mayores en comparación a la aplicación del
protocolo del fabricante.
Adhesive dentistry is based on the performance of the adhesive systems that are on the market, which correspond to a critical point within the protocols of aesthetic restorations. These have diverse indications given by the manufacturers, which are not consistent with multiple clinical studies, because they do not secure the maximum adhesive performance, durability and resistance to get more predictable composite resin treatments over the time. Different classifications can be found within adhesive systems, one of them is universal or multi-mode adhesives. whose adhesive protocols have been extensively studied. This is why the following question is raised: Can it be possible to maximize the adhesive strength of a universal adhesive by means of an experimental protocol compared to the manufacturer’s specifications? The relevance of this research study is to get a standardized clinical protocol of Scotchbond Universal 3M ®. which contributes to the development of clinical practices, to ensure better performance and durability of adhesive restorations. Objective: Compare adhesive bond strength values obtained with the manufacturer’s protocol versus an experimental protocol. Material and method: 36 permanent (premolar) teeth, obtained through voluntary donations made by students of Finis Terrae University, who recruited them in 2018 and 2019. Four independent variables were evaluated: application time, number of layers, solvent evaporation time and polymerization time. For its application, we had a control group corresponding to the indications of the manufacturer of the Universal Scotchbond 3M ® adhesive and an experimental group with operational steps of the experimental protocol, which contained modifications in each variable to be vii evaluated. The last group was divided into 5 subgroups, in 4 of them a respective variable was modified and one that included the modification of all variables. For this reason, 6 groups of 6 teeth were used, generating a total of 36 dental samples, in which the dependent variable, corresponding to the adhesive resistance to shear forces, was tested, the values of which were provided by the universal testing machine brand Bisco ®. The organic remains of each tooth were removed with ultrasound (scaler) and cut with a diamond disc into 4 pieces, so the surface of the teeth could be exposed and the variables mentioned could be tested. Results: All protocols variations show statistically higher binding values compared to the control group (Group 1) except group 3 (number of application of layers). The protocol with al the variations (group 6) showed the best binding strength values. Conclusions: The micro shear strength values obtained by the applying of an experimental protocol of the Universal adhesive Scotch bond 3M ®, in the dental samples, were higher than the application of the manufacturer’s protocol.
Adhesive dentistry is based on the performance of the adhesive systems that are on the market, which correspond to a critical point within the protocols of aesthetic restorations. These have diverse indications given by the manufacturers, which are not consistent with multiple clinical studies, because they do not secure the maximum adhesive performance, durability and resistance to get more predictable composite resin treatments over the time. Different classifications can be found within adhesive systems, one of them is universal or multi-mode adhesives. whose adhesive protocols have been extensively studied. This is why the following question is raised: Can it be possible to maximize the adhesive strength of a universal adhesive by means of an experimental protocol compared to the manufacturer’s specifications? The relevance of this research study is to get a standardized clinical protocol of Scotchbond Universal 3M ®. which contributes to the development of clinical practices, to ensure better performance and durability of adhesive restorations. Objective: Compare adhesive bond strength values obtained with the manufacturer’s protocol versus an experimental protocol. Material and method: 36 permanent (premolar) teeth, obtained through voluntary donations made by students of Finis Terrae University, who recruited them in 2018 and 2019. Four independent variables were evaluated: application time, number of layers, solvent evaporation time and polymerization time. For its application, we had a control group corresponding to the indications of the manufacturer of the Universal Scotchbond 3M ® adhesive and an experimental group with operational steps of the experimental protocol, which contained modifications in each variable to be vii evaluated. The last group was divided into 5 subgroups, in 4 of them a respective variable was modified and one that included the modification of all variables. For this reason, 6 groups of 6 teeth were used, generating a total of 36 dental samples, in which the dependent variable, corresponding to the adhesive resistance to shear forces, was tested, the values of which were provided by the universal testing machine brand Bisco ®. The organic remains of each tooth were removed with ultrasound (scaler) and cut with a diamond disc into 4 pieces, so the surface of the teeth could be exposed and the variables mentioned could be tested. Results: All protocols variations show statistically higher binding values compared to the control group (Group 1) except group 3 (number of application of layers). The protocol with al the variations (group 6) showed the best binding strength values. Conclusions: The micro shear strength values obtained by the applying of an experimental protocol of the Universal adhesive Scotch bond 3M ®, in the dental samples, were higher than the application of the manufacturer’s protocol.
Description
Tesis (Cirujano dentista)--Universidad Finis Terrae, 2021
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Santiago, Chile
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Citation
Keywords
RESISTENCIA ADHESIVA -- EVALUACION, ADHESIVOS DENTALES, MATERIALES DENTALES, TESIS DIGITAL
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Atribución-NoComercial-CompartirIgual 3.0 Chile (CC BY-NC-SA 3.0 CL)