Özet:

Purpose: This in vitro study was aimed at studying the impact of different types of resin-containing modeling liquids used in the forming of composite restorations on the surface microserity, smoothness and color change of a microhybrid composite.  Tools and Methods: 64 microhybrid compounds (Essentia Universal, GC, Tokyo, Japan) in the form of a cylinder with a diameter of 12 mm and a height of 2 mm to be used in the study were prepared according to the following groups; Group 1: Control (without the use of modeling liquid), Group 2: Modeling Liquid (GC), Group 3: G-Premio Bond (GC), Group 4: OptiBond XTR Primer (KavoKerr). The modeling liquids used in shaping were applied only when the microhybrid composite was placed and a transparent band was placed on the top surface of the samples, then 20 seconds polymerized. Examples were polysed with 2500-3000 grid SiC papers and randomly divided into 2 groups (n=8) according to the storage environment in the incubator at 37°C (distile water vaya coffee). Surface microsensitivity (VHN), smoothness (Ra) and color change (ΔE) were measured after 24 hours, 1 week and 6 weeks. The data was analyzed with the ANOVA and Kruskall Wallis tests (p=0.05).  Results: Storage environment and time microhybrid composite has not affected the surface microsensity in any group (p>0.05). The application of Modeling Liquid positively affected the smoothness of the samples for all storage periods when samples were stored in the coffee (p<0.05). In the control group and in the Modeling Liquid applied group compared to other groups, the samples showed less color change for all storage periods when stored in the coffee (p<0.05).  Results: Different types of modeling liquids used to shape the microhybrid composite may affect the surface characteristics of the microhybrid composite and the change of color. Keywords:Microhybrid composite; Modeling resin; Microsurgency; Surface smoothness; Change of color.