Effects of polishing procedures on optical parameters and surface roughness of composite resins with different viscosities

• Published in: Dental Materials Journal Vol. 42; no. 2; pp. 199 - 210
• Main Authors: DEGIRMENCI, Alperen, PEHLIVAN, Ikbal Esra, DEGIRMENCI, Beyza UNALAN
• Format: Journal Article
• Language: English
• Published: Japan The Japanese Society for Dental Materials and Devices 25-03-2023; Japan Science and Technology Agency
• Subjects: Composite materials; Composite Resins; Dental Polishing - methods; Materials Testing; Opalescence; Optical measurement; Optical properties; Parameters; Polishing; Refractive index; Refractivity; Resins; Statistical analysis; Statistical models; Surface Properties; Surface roughness; Translucency; Two dimensional analysis; Variance analysis; Viscosity; Opalescence; Surface roughness; Composite resins; Refractive index; Translucency
• ISSN: 0287-4547; 1881-1361
• DOI: 10.4012/dmj.2022-178

The 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).