Efecto de la variación en la técnica adhesiva convencional sobre la resistencia microtraccional
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Fecha
2015
Autores
Profesor/a Guía
Facultad/escuela
Idioma
es
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Universidad Andrés Bello
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Licencia CC
Licencia CC
Resumen
Antecedentes: Los fabricantes de adhesivos para composites recomiendan un
protocolo adhesivo, que tiene relación con la efectividad de la adhesión. Esto
repercute en la duración de la restauración de composite.
En Chile existen estudios sobre la resistencia microtraccional de las distintas
marcas, pero no existen estudios que evalúen la variación en la técnica
adhesiva estricta.
Justificación: Se evaluó la variación de la técnica adhesiva con instrumentos
válidos y confiables (Micro Tensile Tester, Bisco), se fundamenta en la
necesidad de valorar la resistencia microtaccional, fenómeno clave en la
duración y persistencia en boca de las restauraciones.
Objetivo: Planteamos como objetivo principal determinar la relación de las
variaciones en la técnica adhesiva convencional y la resistencia microtraccional
de resinas compuestas realizadas in vitro, sobre terceros molares sanos y
extraídos. Mediante pruebas microtraccionales realizadas con el Micro Tensile
Tester, Bisco.
Material y Métodos: La presente investigación es un estudio de abordaje
cuantitativo, cuyo diseño es experimental, con dos grupos; grupo control y
grupo de tratamiento. La muestra fue constituida por 107 especímenes
obtenidos de terceros molares sanos, extraídos en clínicas odontológicas de la
comuna de Concepción, los que fueron sometidos a técnica adhesiva
convencional estricta y técnicas adhesivas que incorporen variaciones en el
protocolo clínico (grabado y adhesivo). Cumpliendo con los criterios de
inclusión y exclusión definidos para la investigación. Los resultados de las
mediciones traccionales de los grupos fueron comparados con un patrón
estándar que cumplió con las indicaciones de manejo clínico y protocolo que indica el fabricante. Para el análisis de los datos, se utilizó un software
estadístico SPSS v.22. Se evaluó normalidad para los valores de resistencia
microtraccional obtenidos de cada muestra mediante el test de K-S. Con la
finalidad de evaluar las diferencias entre las resistencias microtraccionales del
grupo control y los grupos de experimento, se realizó un test de ANOVA y
comparaciones múltiples.
Resultados:
Se demostró que las variaciones en la técnica adhesiva afectan de manera
significativa a la resistencia microtraccional de las restauraciones de resina
compuesta realizadas sobre la superficie dentinaria de terceros molares sanos.
Al comparar la resistencia microtraccional del grupo control (21,09 MPa) versus
la de los grupos de tratamiento se obtuvo los siguientes resultados
estadísticamente significativos. El grupo 5 (3 capas de adhesivo) mostró una
fuerte disminución de la resistencia microtraccional (12,34 MPa). Mientras que
el grupo 4 (1 capa de adhesivo), experimentó un aumento en la resistencia
microtraccional (26,49 MPa). El grupo 3 (30 segundos de grabado) no arrojó
diferencias estadísticamente significativas. El grupo 2 (sin grabado ácido) fue
excluido del estudio ya que ninguna muestra resistió el proceso de corte.
Background: Adhesive manufacturers recommend an adhesive protocol for composites, that relates to the effectiveness of adhession. What affects the duration of the restoration. In Chile exists microtensile studies of different brands. But there are no studies that evaluate the variation in strict adhesive technique. Justification: Assess variations of of the adhesive technique with valid and reliable instruments (Micro Tensile Tester , Bisco) , it is based on the need to assess the microtensile strength, key phenomenon in the duration and persistence in the mouth of the restorations. Purpose: We propose as main objective to determine the relationship of variations in conventional adhesive technique and microtensile bond strength of composites performed in vitro, on healthy and extracted third molars. By microtensile tests performed with the Micro Tensile Tester, Bisco. Material and Methods: This research is a quantitative study, whose design is experimental, with two groups; control group and treatment group. The sample consisted of 107 specimens from healthy third molars extracted in dental clinics in the district of Concepcion, which were subjected to strict conventional adhesive technique and adhesive techniques that incorporate changes in clinical protocol (etching and adhesive). Satisfying the criteria for inclusion and exclusion. The results of the tensile measurements will be compared with a standard pattern comply with the manufacturer's instructions. For data analysis, statistical software used SPSS v.22. Normality was assessed for microtensile strength values obtained from each sample by the K-S test. In order to assess the differences between microtensile bond strength of control and experimental groups, ANOVA test and multiple comparison test was performed. Outcomes: It was shown that variations in the adhesive technique significantly affect the microtensile strength of composite restorations performed on dentin surface of healthy third molars. By comparing microtensile strength of the control group (21.09 MPa) versus the treatment group, the following statistically significant results were obtained. Group 5 (3 layers of adhesive) showed a sharp decline in microtraccional resistance (12.34 MPa). While group 4 (1 layer of adhesive), experienced an increase in microtraccional resistance (26.49 MPa). Group 3 (30 seconds of etching) showed no statistically significant differences. Group 2 (without acid etching) was excluded from the study because any specimen resisted the cutting process.
Background: Adhesive manufacturers recommend an adhesive protocol for composites, that relates to the effectiveness of adhession. What affects the duration of the restoration. In Chile exists microtensile studies of different brands. But there are no studies that evaluate the variation in strict adhesive technique. Justification: Assess variations of of the adhesive technique with valid and reliable instruments (Micro Tensile Tester , Bisco) , it is based on the need to assess the microtensile strength, key phenomenon in the duration and persistence in the mouth of the restorations. Purpose: We propose as main objective to determine the relationship of variations in conventional adhesive technique and microtensile bond strength of composites performed in vitro, on healthy and extracted third molars. By microtensile tests performed with the Micro Tensile Tester, Bisco. Material and Methods: This research is a quantitative study, whose design is experimental, with two groups; control group and treatment group. The sample consisted of 107 specimens from healthy third molars extracted in dental clinics in the district of Concepcion, which were subjected to strict conventional adhesive technique and adhesive techniques that incorporate changes in clinical protocol (etching and adhesive). Satisfying the criteria for inclusion and exclusion. The results of the tensile measurements will be compared with a standard pattern comply with the manufacturer's instructions. For data analysis, statistical software used SPSS v.22. Normality was assessed for microtensile strength values obtained from each sample by the K-S test. In order to assess the differences between microtensile bond strength of control and experimental groups, ANOVA test and multiple comparison test was performed. Outcomes: It was shown that variations in the adhesive technique significantly affect the microtensile strength of composite restorations performed on dentin surface of healthy third molars. By comparing microtensile strength of the control group (21.09 MPa) versus the treatment group, the following statistically significant results were obtained. Group 5 (3 layers of adhesive) showed a sharp decline in microtraccional resistance (12.34 MPa). While group 4 (1 layer of adhesive), experienced an increase in microtraccional resistance (26.49 MPa). Group 3 (30 seconds of etching) showed no statistically significant differences. Group 2 (without acid etching) was excluded from the study because any specimen resisted the cutting process.
Notas
Tesis (Cirujano Dentista)
Palabras clave
Adhesivos Dentales, Materiales Dentales, Resistencia microtraccional