Evaluate the color stability of Universal Composite Resins in different Beverages. An in vitro Stud

• Autor(a) principal: Vidal, Robert Felipe Moreno
• Data de Publicação: 2023
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/20.500.11816/4371
• topic: Color; Stability; Beverages; Resin

Introduction: Composite resin restorations have become popular due to their aesthetic contribution; with the development of Bis-GMA in 1962, the physical characteristics were improved, but discoloration remains a problem about color stability. Objectives: To compare the effect of beverages such as Coca-Cola®, coffee, red wine, Red-Bull® and distilled water on the color stability of two universal composite resins (nanohybrid and nanofilled). Methodology: Thirty disk-shaped specimens with a diameter of 12 mm and a thickness of 2 mm, were prepared from each type of composite resin. (Grandio®SO, FiltekTM Universal Restorative). The method for measuring color followed the Commission Internationale l’Eclairage L*a*b* (CIE L*a*b*) guidelines, using a spectrophotometer VITA Easyshade® V, before and after immersion of the specimens in different beverages. The specimens were immersed for 240h. Results: Coffee and red wine caused the greatest color change, with FiltekTM Universal being most affected by red wine and Grandio®SO by coffee. Discussion: The color changes in coffee and red wine due to the presence of anthocyanins, tannins and acid. Although Coca-Cola® and Red-Bull® showed minimal color change, the importance of selecting appropriate materials for clinical applications was highlighted. Conclusion: This study evaluated the color stability and optical properties of two universal resin composite materials and determined that various factors influence their color stability. The nanohybrid composite showed higher color stability than nanofilled composite. The study's findings are useful for selecting optimal materials for clinical applications and providing information on the color stability of resin composites in different solutions.