Abstract:In this study, in order to evaluate the effect of three kinds of sports drinks on the color stability of light cured composite resin materials after 1 and 6 months of immersion, the reference color values (L*, a*, b*) of four kinds of resin composites were measured, and samples from each group of composite materials were randomly selected and immersed in sports drinks and distilled water for 1 month and 6 months. The color values of the samples after immersion were re measured, and the color change value (DE) was calculated. The data were evaluated by Kruskal - Wallis and Mann-Whitney methods. The resin composite showed a color change over a 6-month evaluation period, with the highest color change observed in APX samples immersed in burn at 1 month (P<0.01); after 6 months, Posterior showed less discoloration (P<0.001). Among the composite materials tested, Burn sports drink showed the highest fading level (P<0.01). During the 6-month evaluation period, the color stability of the test samples in this study was mainly affected by the solution type, soaking time and composite composition. The results showed that long-term in-taker of sports should pay attention to their dyeing effect and potential corrosion.