Influence of polishing protocol on flexural properties of several dental composite resins

ABSTRACT

The aim of this study was to determine the influence of the finishing protocol (FP) on flexural properties of several composites (CR). Twenty composite samples (25x2x2 mm) were prepared G1 HelimolarR; G2 Filtek™ Z350;G3TetricR N Ceram, G4 Point 4™, G5 Premisa™; G6 Esthet.XR HD, G7 ice, G8 Vit-L-escenceR, G9 GrandioR, G10 TPHR3, G11 AmelogenR Plus, G12 Brilliant Enamel; G13 Filtek™ Z100 and randomly divided into four groups according to the finishing system C control, J JiffyR, SS Super SnapR, AA AstropolR /AstrobrushR. Each sample was polished for 10 seconds with each sequence instrument, and stored in distilled water for 24 hours, after which a three-point flexure test was applied to determine flexural strength (FS) and modulus (Flexural modulus). Data were analyzed using a two-way multivariate ANOVA and means were compared with Tukey's test. Results were FS level CR p=0.000 with significant differences. FS level FPp= 0.093 with significant differences. In order FM level CR p 0.00 with significant differences. FM level PS p=0.001; with significant differences. Under the study conditions, the polishing systems based on silicone rubber decreased the flexural properties of composite resins.

RESUMEN

El objetivo de este trabajo fue determinar la influencia del protocolo de pulido sobre las propiedades flexurales de varios composites. Se prepararon veinte probetas de composite (CR) (25x2x2 mm) en cada grupo G1 HelimolarR; G2 Filtek™ Z350;G3TetricR N Ceram, G4 Point 4™, G5 Premisa™; G6 Esthet.XR HD, G7 ice, G8 Vit-L-escenceR, G9 GrandioR, G10 TPHR3, G11 AmelogenR Plus, G12 Brilliant Enamel; G13 Filtek™ Z100 y se dividieron aleatoriamente en cuatro grupos segun el sistema de pulido (SP) utilizado C control, J JiffyR, SS Super SnapR, AA AstropolR /AstrobrushR. Cada probeta se pulio durante 10 segundos con cada secuencia de instrumentos, se almaceno en agua destilada durante 24 hs y se aplico un ensayo de resistencia flexural de tres puntos a fin de determinar la resistencia (RF) y el modulo (MF) flexural. Los valores obtenidos fueron analizados con un ANOVA multivariado de dos vias y comparacion de medias de Tukey. Los resultados obtenidos fueron nivel de RF para CR p=0,000con diferencias significativas. RF nivel SP p= 0,093 con diferencias signi - ficativas. Para MF a nivel de CR p=0,000con diferencias signifi cativas. MF a nivel SP p=0,000, con diferencias signifi - cativas. En las condiciones de este trabajo se puede concluir que el uso de sistemas a base de gomas siliconadas disminuyen las propiedades flexurales de las resinas reforzadas restaura - doras. composite resins; elastic modulus; dental polishing.