title: Optical properties of supra-nano spherical filled resin composites compared to nanofilled, nano-hybrid and micro-hybrid composites.
abstract: This study aimed to evaluate and compare the optical properties of supra-nano spherical filled resin composites and the nanofilled, nano-hybrid and microhybrid composites using the Kubelka-Munk Theory. Diffuse reflectance of samples (Shade A2) was measured against white and black backgrounds, using a spectroradiometer, using a viewing booth with D65 illuminant and d/0º geometry. S and K coefficients and T were calculated using Kubelka-Munk's equations. The spectral behavior of S, K and T was similar for all dental resin composites analyzed (VAF close to 100%), even though they were, generally, statistically different (p≤0.05). The K-M T values overestimate the real value of Transmittance of the resin composites. Supra-nano spherical filled resin composites show the highest scattering and Transmittance when compared with the others materials, probably due to the shape and size of the filler. Such difference should be taken into consideration in a clinical situation to reproduce natural esthetic restorations.
authors.affiliation: Department of Optics, Faculty of Science, University of Granada.
authors.forename: María M
authors.initials: MM
authors.lastname: Perez
authors.forename: Cristina
authors.initials: C
authors.lastname: Hita-Iglesias
authors.forename: Razvan
authors.initials: R
authors.lastname: Ghinea
authors.forename: Ana
authors.initials: A
authors.lastname: Yebra
authors.forename: Oscar E
authors.initials: OE
authors.lastname: Pecho
authors.forename: Ana M
authors.initials: AM
authors.lastname: Ionescu
authors.forename: Almudena
authors.initials: A
authors.lastname: Crespo
authors.forename: Enrique
authors.initials: E
authors.lastname: Hita
mesh_terms: D003116:Color; D003188:Composite Resins; D003764:Dental Materials; D006801:Humans; D008422:Materials Testing
chemical_list: D003188:Composite Resins; D003764:Dental Materials