Tuğba MİSİLLİ, Nihan GONULOL, Özge Gizem CABADAĞ, Lena ALMASIFAR, Derya DİNÇ

THE EFFECT OF PH-CYCLING AND TOOTHBRUSHING SIMULATIONS ON SURFACE ROUGHNESS OF BULK-FILL COMPOSITES

ABSTRACT Objective: This study aimed to compare surface roughness values (Ra) of different posterior composites after pH-cycling and toothbrushing simulation. Methods: Fifty disc-shaped specimens (8x2 mm) were prepared by using three bulk-fill composites [Filtek Bulk Fill Posterior (FBF), SonicFill (SF), X-tra fil (XF)], a flowable [G-aenial Universal Flo (GF)], and a microhybrid composite [Filtek Z250 (Z250)]. After initial roughness (Ra0) measurements were performed with a contact profilometer, the samples were subjected to a pH-cycling model for 10 days and Ra1 values were recorded. Then, the samples were subjected to toothbrushing simulation for 4 min and final values (Ra2) were recorded. From each group, a representative sample was analyzed with an optical profilometer. The values were analyzed by two-way ANOVA with repeated measures on one factor (period) followed by Tukey’s test (p

Keywords:

pH-cycling, bulk fill composites, surface roughness, toothbrushing,

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