Comparative analysis in vitro microfiltration grade adhesive between seventh and fifth generation system

El objetivo de este estudio fue comparar el grado de microfiltración en adhesivos de quinta generación Adper Single Bond (3M ESPE) y séptima generación Gc G-Bond (Gc Corp) por medio de infiltración de colorantes y observación microscópica. Metodología:Se seleccionaron 30 piezas dentales sanas correspondientes a premolares y terceros molares. Las piezas dentarias fueron limpiadas y almacenadas en agua destilada. Se realizaron las preparaciones de una cavidad clase V en la superficie vestibular y lingual de cada diente. Se empleó el adhesivo Adper Single Bond (3M ESPE, quinta generación) en la cavidad vestibular y Gc G-Bond (Gc Corp, séptima generación) en la cavidad lingual, todas las piezas dentarias fueron restauradas con resina compuesta Valux Plus A3 (3M ESPE). La muestra fue sometida a penetración de colorante, azul de metileno al 2%, por 24 horas y se efectuó un corte en sentido mesiodistal y analizadas con microscopia óptica. Se empleó la prueba estadística t-student para muestras independientes y el análisis de las diferencias en los niveles de microfiltración marginal, con un nivel de significancia estadística del 95%(p<= 0.05). Los resultados se analizaron mediante el software SPSS. Resultados: Al analizar la resultados se observa que existe una diferencia significativa (P= 0,033) entre los sistemas adhesivos de quinta y séptima generación. Presentando los adhesivos de séptima generación (Gc G-Bond - Gc Corp) valores menores de microfiltración. Conclusión: De los resultados obtenidos se puede concluir que adhesivos de quita generación (Adper Single Bond - 3M ESPE), como los de séptima generación (Gc G-Bond - Gc Corp) presentan microfiltración al colorante. Presenta una microfiltración significativa menor el adhesivo Gc G-Bond.PALABRAS CLAVES:Microfiltración, Resina compuesta, Adhesivo, Autograbante, Colorante.ABSTRACTThe aim of this study was to compare the microleakage of total-etch adhesive Adper Single Bond (3M ESPE) and self-etch adhesives Gc G- Bond (Gc Corp) by dye penetration. Thirty premolar and third molar teeth were selected for this in vitro study and class V cavities were prepared on the lingual and buccal surface. Adhesive Adper Single Bond (3M ESPE) in buccal cavity and Gc G- Bond (Gc Corp) in lingual cavity was applied and all of them were restored with a light cure resin composite, Valux Plus A3 (3M ESPE). The samples were exposed to dye penetration with methylene blue 2% for 24 hours and then microleakage was evaluated under optic microscope. To analyze microleakeage was used a qualitative method with a 0 to 3 scale. Data were analyzed by unpaired t-test. There was significant difference in dye penetration (P = 0.033) between the two adhesive systems; with lower values presented by self-etch adhesives. Within the limiting factors of this in vitro study, it was concluded that the use of this adhesive system might increase marginal seal against fifth generation systems.KEY WORDS S:Microleakage, Resin composite, Dental Adhesive, Self- etch, One- step adhesives, Dye.The aim of this study was to compare the microleakage of total-etch adhesive Adper Single Bond (3M ESPE) and self-etch adhesives Gc G- Bond (Gc Corp) by dye penetration. Thirty premolar and third molar teeth were selected for this in vitro study and class V cavities were prepared on the lingual and buccal surface. Adhesive Adper Single Bond (3M ESPE) in buccal cavity and Gc G- Bond (Gc Corp) in lingual cavity was applied and all of them were restored with a light cure resin composite, Valux Plus A3 (3M ESPE). The samples were exposed to dye penetration with methylene blue 2% for 24 hours and then microleakage was evaluated under optic microscope. To analyze microleakeage was used a qualitative method with a 0 to 3 scale. Data were analyzed by unpaired t-test. There was significant difference in dye penetration (P = 0.033) between the two adhesive systems; with lower values presented by self-etch adhesives. Within the limiting factors of this in vitro study, it was concluded that the use of this adhesive system might increase marginal seal against fifth generation system