Introduction:The color matching between aesthetic materials and dental structure is certainly the parameter most used by patients to evaluate the quality of the aesthetic treatments performed, influencing decisively the judgment of professional competence and the degree of patient satisfaction at the end of the treatment.Objective: To identify among the composite resins, which present greater color matching with the Vita Classical scale.Method: Six groups were formed; the Tetric N-Flow® color A1 resin was used as light control and the Tetric N-Flow® A4 color as dark control and 4 A2D color resins (Oplais, Empress Direct, Esthelite and Z350). For each material, ten specimens were prepared. The reading of each test specimen was performed through a spectrophotometer and then annotated the CIELab standard, in addition to reading through the hue and chroma. A visual evaluation was performed between 4 evaluators so that they could check the resins against the light and dark patterns. Results:The tonality of each specimen presented a low percentage of correspondence, in relation to the A2 color of the Vita scale. The ΔE values of the groups and the A2 range of the Vita scale were submitted to statistical analysis with 5% significance. ANOVA resulted in statistically significant differences for all sample groups (p <0.05). The Tukey test showed no color match between the analyzed materials and the reference hue of the Vita scale. Conclusion:there was no color match with the reference A2 of the Vita scale; the differences of composition and manufacturers result in colors that are close but different.

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Introduction: Composite resins are materials that have in their organic matrix different components that can change their initial state after the expiration date established by the manufacturer. Objective: to evaluate in vitro the possible color change of two composite resins used during and after the period of validity. For this, composite resins LLis color A1 and A2 will be selected, inside and outside the shelf life. Methods: For each resin (4 groups) were made ten discs (n = 10), of 5mm x 2mm. The analyzes were carried out in an environment with lighting and temperature controlled by a single examiner. Results: The spectrophotometric test was performed using the Vita EasyShade® device in which the values of the Vitta scale and the Cie system L * a * b * were obtained. The values of ΔE were obtained by comparing the specimens of expired and non-expired resins and showed that, regardless of the color tested, the resins did not change color. Conclusion: Regardless of the color, the resins out of the shelf life showed no color difference.

Introduction: Composite resins are materials that have in their organic matrix different components that can change their initial state after the expiration date established by the manufacturer.Objective: to evaluate in vitro the possible color change of two composite resins used during and after the period of validity. For this, composite resins LLis color A1 and A2 will be selected, inside and outside the shelf life.Methods: For each resin (4 groups) were made ten discs (n = 10), of 5mm x 2mm. The analyzes were carried out in an environment with lighting and temperature controlled by a single examiner. Results:The spectrophotometric test was performed using the Vita EasyShade® device in which the values of the Vitta scale and the Cie system L * a * b * were obtained. The values of ΔE were obtained by comparing the specimens of expired and non-expired resins and showed that, regardless of the color tested, the resins did not change color. Conclusion:Regardless of the color, the resins out of the shelf life showed no color difference.