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espanolIntroduccion: Recientemente se han desarrollado las resinas bulk-fill que pueden ser utilizadas con tecnica monoincremental, reemplazando la tradicional tecnica incremental oblicua y acortando el tiempo clinico. El objetivo de este estudio es evaluar la adaptacion de las resinas compuestas a las paredes internas cavitarias, utilizando tecnica incremental oblicua y monoincremental con activacion sonica. Material y metodo: Se utilizaron 15 terceros molares sanos, a los cuales se les realizo dos preparaciones cavitarias clase II con margenes en esmalte, de dimensiones en sentido mesiodistal de 3 mm, vestibulolingual de 2,5 mm, profundidad oclusopulpar de 2 mm y profundidad oclusoproximal de 4 mm. Las preparaciones distales se restauraron utilizando la resina convencional FiltekTM Z350 XT con tecnica incremental y las mesiales con la resina bulk-fill SonicFillTM con tecnica monoincremental y activacion sonica. Las muestras fueron cortadas en sentido mesiodistal y analizadas mediante microscopio optico a sumento de 10× y 40×. Se midio el porcentaje de adaptacion de ambas resinas y se realizo un test ANOVA de dos vias con prueba post hoc de Tukey. Resultados: No se encontro diferencia estadisticamente significativa en la adaptacion interna cavitaria utilizando la tecnica monoincremental con activacion sonica y la incremental oblicua (p>0,01). Discusion: La tecnica monoincremental con activacion sonica, a pesar de tener un menor tiempo en el mercado, menor tiempo de entrenamiento clinico y menor consumo de tiempo clinico presento valores similares de adaptacion a las paredes internas cavitarias que la tecnica incremental oblicua. EnglishIntroduction: Recently, Bulk-Fill resins have been developed and they can be used with a mono-incremental technique, eliminating the traditional oblique incremental technique and shortening the clinical time. The aim of this study is to evaluate the internal adaptation of composite resins using oblique incremental and monoincremental techniques with sonic activation. Material and method: 15 healthy third molars were used and two enamel finished class II cavity was performed on each one of them. Dimensions were: 3 mm mesio-distal, 2.5 mm buccal-lingual, 2 mm occlusal-pulp depth, and 4 mm occlusal-proximal depth. The distal preparations were restored using a conventional FiltekTM Z350 XT (3M ESPE, USA) resin with oblique incremental technique and the mesial ones were restored using Bulk-Fill SonicFillTM (Kerr, USA) resin through mono-incremental technique and sonic activation. The samples were cut in a mesiodistal direction and analyzed with an optical microscopy at 10× and 40× magnification. The percentage of adaptation of both resins was measured, and a two-way ANOVA with Tukey correction was performed. Results: No statistically significant difference was found in the adaptation of both resins, using oblique incremental and mono-incremental techniques with sonic activation (p>0.01). Discussion: Both techniques reported similar values of adaptation, therefore, the mono- incremental technique with sonic activation is a recently introduced technique, which seems to be less sensitive than oblique incremental technique.

Evaluación de la adaptación interna de resinas compuestas: técnica incremental versus bulk-fill con activación sónica