title: Parameters that affect the color of direct restorative resins.
abstract: The effects of thickness, background color, specular reflection, and surface roughness on the color of five commercial restorative resins were studied by reflection spectrophotometry. As thickness increased, values of luminous reflectance and excitation purity increased for a black background but decreased for a white background. Opacity increased dramatically as thickness increased from 1.3 to 3.9 mm.
mesh_terms: D000180:Acrylic Resins; D003116:Color; D003188:Composite Resins; D003793:Dental Restoration, Permanent; D008027:Light; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D013499:Surface Properties
chemical_list: D000180:Acrylic Resins; D003188:Composite Resins