In vitro comparison of the surface microhardness of three nanohybrid resin composites immersed in different pigmented beverages for varying exposure times. - Ayala-Amaya W; Castro-Ramirez L; Santander-Rengifo F; Alvino-Vales M; Turpo-Claudio D; Cayo-Rojas C (Journal of clinical and experimental dentistry, 2025)