WEAR PROPERTIES OF NANOFILLED AND MICROFILLED COMPOSITE RESTORARIVE MATERIALS

Year 2016, Volume: 1 Issue: 1, 16 - 22, 01.01.2016

Efe Çetin Yılmaz Recep Sadeler

Abstract

The purpose of this in vitro study was to compare the two-body wear resistance of nanofilled (3M ESPE Filtek Silorane ) and microfilled (3M ESPE Filtek Z250) composite restorative materials. Eight standardized disc shape specimens (6mm diameter X 8mm height) were prepared from two composite materials. Specimens were subjected to chewing simulation using a chewing simulator (F=49N (vertical 6 mm, horizontal 2 mm) 2,4 X 105 cycles and frequency 1,6 Hz) and simultaneous thermal cycling (3000 cycles, 5°C/55°C, 1min/cycle). AL2O3 balls were used as antagonists for every experiment chewing cycle. Mean volume loss values were determined using 3D laser scanning device. Mean values and standard deviations were calculated and statistical analysis was performed using one-way Anova and Tukey’s test (α=,05). Vicker hardness values for Filtek Z250 (about 69HV) and for Filtek Silorane (about 45HV) were measured. Mean volume loss of Filtek Z250 (3,8µm3 p=.021) is measured to be lower than Filtek Silorane (5,9µm3 p=.017). In this study, suggested the excellent two body wear behaviour of the microfilled Filtek Z250. However, this study isn’t correlations linear between filler volume values and two body wear resistance

Keywords

Two-body Wear, Composite Restorative Materials, Chewing Simulation, Thermal Cycling

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