Effect of different finishing/polishing procedures on surface roughness of Ormocer‑based and different resin composites

Marco Colombo, Lodovico Vialba, Riccardo Beltrami, Ricaldone Federico, Marco Chiesa, Claudio Poggio


Background: The aim of this study was to evaluate and compare the surface roughness of six
esthetic restorative materials (Gradia Direct Anterior, GC Corporation, Tokyo, Japan; Filtek Supreme
XTE, 3M ESPE, St. Paul, MN, USA; Ceram.X Universal, Dentsply DeTrey, Konstanz, Germany; Essentia
enamel, GC Corporation, Tokyo, Japan; Admira Fusion, Voco, Cuxhaven, Germany; and Estelite,
Tokuyama Dental corporation, Taitou‑ku, Tokyo, Japan) achieved using three different finishing and
polishing techniques.
Materials and Methods: In this in vitro study Forty specimens of each material (6 mm in diameter,
2 mm high) were created and divided into four groups, one per each finishing and polishing procedure
and a control group, only cured and not polished. All specimen preparation and finishing and polishing
procedures were performed by the same investigator, to reduce variability, following strictly the
manufacturer’s instructions. Specimens were analyzed using a profilometer to measure the mean
surface roughness (Ra, μm), and microscopy images were taken during the measurements through
the microscope of the profilometer. Two‑way ANOVA test was applied to determine significant
differences with respect to material, finishing/polishing technique, and interaction between both
variables. Post hoc comparison was done using Tukey’s honestly significant difference test. Significance
for statistical tests was predetermined at P < 0.05.
Results: Finishing and polishing procedure using tungsten carbide burs provided the best values
in terms of surface roughness. All materials of this study treated with this method have provided
superimposable values, and no material can be considered more performing than the others. Similar
values were also found in the control group.
Conclusion: This study demonstrated that the finishing technique with carbide burs produced an
excellent surface smoothness, even if the best surface smoothness is achieved curing the restorative
material under a polyester matrix.
Key Words: Dental finishing, dental polishing, restorative materials

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