Degirmenci, A.Pehlivan, I.E.Unalan Degirmenci, B.2025-05-102025-05-1020230287-454710.4012/dmj.2022-1782-s2.0-85151312963https://doi.org/10.4012/dmj.2022-178https://hdl.handle.net/20.500.14720/3255The aims of this study were to evaluate the optical properties of flowable and injectable composites after polishing, such as translucency (translucency parameter [TP], TP00), opalescence (OP-BW), chroma (C*ab), refractive index (RI), and change in surface roughness (Ra, Rz). Ninety disc-shaped samples were prepared from micro-hybrid, flowable, and injectable composites and divided into 3 groups according to the polishing systems (n=10). The RI was measured with an Abbe refractometer, and optical measurements were performed with a spectrophotometer. The surface roughness was measured with a two-dimensional profilometer. Data were analyzed with the generalized linear model method and two-way analysis of variance. The results showed that the polishing procedure did not significantly impact the RI (p=0.987). Injectable composite had the highest translucency (TP=28.67; TP00=13.49) and opalescence (OP-BW=13.11); showed the lowest C*ab value (17.95). Also, the effects of the composite type and polishing procedure on surface roughness were statistically significant (p=0.047 and p<0.001). © 2023, Japanese Society for Dental Materials and Devices. All rights reserved.eninfo:eu-repo/semantics/openAccessComposite ResinsOpalescenceRefractive IndexSurface RoughnessTranslucencyArticle422Q3Q219921036476685