About the Journal

Download [This article belongs to Volume - 64, Issue - 02]

Abstract : This study aims to compare the compressive between bulk composite and fiber reinforced bulk composite. This study included 30 cylindrical samples, were randomly divided into two groups in the following order: Group 1 (n=15): Bulk composite (Tetric® N-Ceram Bulk Fill, Ivoclar Vivadent, USA), and Group 2 (n=15): Fiber reinforced bulk composite (Polydentia, Switzerland). These samples were restored by means of a dark Teflon mold for the research, which contains in its center a cylindrical cavity of dimensions: 5 mm in diameter and 6 mm in height. The samples were photopolymerized using light-curing unit LED (Light Emitting Diode), an optical intensity of 1200 mw/cm2, and were stores at 37° for 24 hours before testing, then were subjected to thermal cycles 5000 times between 5° and 55° in a 15 second dwell period, with a 15 second transfer. The samples were prepared for testing and then transferred to the standard testing machine (Testometric AX 114, Universal Testing machine). Results were statistically analyzed using Student's t-test. It was showed that there were statistically significant differences between the two different study groups (p<0.05). The values of microhardness (HV) in the fiber reinforced bulk composite group were higher than in the bulk composite group.