Estabilidad del color de resinas compuestas diseñadas para el sector anterior luego de realizar maniobras de pulido y envejecimiento uv

Abstract

Composites resins are most frequently used materials in Restorative Dentistry especially when the aesthetic effect becomes important. An experimental design study was carried out, with a longitudinal cut and a comparative type with the aim of establishing differences in color stability of different types of composite resins: nano-filler, micro-hybrid and nano-hybrid, polished with two finishing and polishing systems: (rubber vs. discs), at three different times: pre-olishing, post-polishing and ultraviolet (UV) aging. Eight specimens were made of three composite resins Filtek Z350® (Z350), TetricNceram® (TNC) and BrilliantEnamel® (BE). Randomly subdivided into two groups to be submitted to the following systems of polished (SP): Jiffy ® (J) and Super Snap® (SS). Color was determined using the CIEL*a*b* scale at three stages, Pre-polishing1, Post-polishing2, and Uv Aging3. For statistical analysis was used a repeated measures ANOVA, for multiple comparisons of Tukey HSD test for inter-subjects effects and Bonferroni for significance, p=0.05 value. The results showed HSD Tukey: 70,2 ?E M1:Z350 (0.9) > TNC ?E 66.6 (0.8) = BE ?E 65.7 (0.9). M2:Z350 ?E 70.8 (1.1) > = TNC ?E 66.6 (1) and BE ?E 66.4 (0.4). M3: 68.6 ?E Z350 (0.7) = TNC ?E 68.3 (2,4) G BE ?E 64 (1,2). SP: p= 0.05 no significant statistical differences. Bonferroni: M2 ?E 67.9 (2.2) > ?E 67.5 (2.2) M1 = M3 ?E 67 (2.7). It was concluded that under the conditions in which this research was carried out the color stability of the resins tested is independent of the finishing and polishing system. Accelerated ultraviolet (UV) aging produces changes in the color and surface of the samples making them rougher and more chromatic. However, the presence of pre-polymers in TNC appears to improve stability.