AIM or PURPOSE
The aim of this study is to compare the effect of different finishing and polishing procedures on the surface roughness of a microhybrid composite resin material.
MATERIALS and METHOD
In the study, a tungsten carbide finishing bur, Sof-Lex composite finishing and polishing discs (3M), and Diapolisher diamond-containing polishing paste (GC) were used. Using Herculite Classic B1 composite resin (Kerr), 35 composite samples were prepared with metal molds of 3 mm depth and 3 mm diameter. The specimens were cured for 40 seconds with quartz halojen light curing unit for polymerization. The prepared samples were randomly divided into 5 groups. The first group served as the control group. Afterwards, the 2nd group received treatment with a finishing bur, the 3rd group with finishing and polishing discs, the 4th group with finishing bur and polishing discs, and the 5th group with finishing bur, polishing discs, and polishing paste. Surface roughness after polishing was measured at three different points using Surtronic 25 (Taylor-Hobson) and surface of one sample from each group was observed under a scanning electron microscope (SEM). The obtained data were analyzed using the Kruskal-Wallis test. Statistical significance level was established at p<0.05.
RESULTS
The highest roughness value (Ra) was observed in the control group obtained with transparent tape (0.19), while no significant difference was found among the statistical analysis of the polishing systems applied to the data. However, the highest Ra among the polishing systems was observed in the group treated only with polishing discs (0.50), while the lowest Ra was observed in the group treated with carbide bur, polishing discs, and polishing paste (0.63).
CONCLUSION(S)
The surface roughness values of microhybrid composite resins did not show a significant difference after different finishing and polishing procedures.