| Summary: | Composite is a combination of filler and matrix. The additional of fiber in
the composite has a function as load-bearing in mastication. Polyethylene fiber
has been used as a reinforced to receive the forces on the fixed denture fiber
reinforced composite (FRC). FRC with a combination of particulate filler resin
and fiber will produced an aesthetic and biomechanical as teeth. The position and
the volumetric fraction of fibers could affect the mechanical properties of FRC.
The purpose of this study was to determine the effect of the position and the
volumetric fraction of fibers on the flexural strength and modulus polyethylene
FRC.
This study used 7 groups with variations in the position and the
volume of fiber. Group I (position compression volume 1 sheet), group II (2
volume compression sheet position), group III (volume 1 sheet neutral position),
group IV (neutral position volume 2 sheets), Group V (position tension volume 1
sheet), group VI (position tension volume 2 sheets), and group VII (without fiber).
Each group consisted of 6 samples and FRC rod-shaped samples with size
(25x2x2) mm. Samples were tested by three-point bending test with a universal
testing machine. The data were analyzed by the (two-way ANOVA) and LSD test
continued (α = 0,05).
Group VI has the highest mean flexural strength than others that was
(360.74 MPa) and group IV has the highest flexural modulus than others that was
(3.56 GPa). The flexural strength and modulus with the variation of the position
or volume showed that was a significant differences (p <0.05), while the
interaction between the position and the volume showed that there was no
significant difference (p> 0,05). The position fiber on tension and additional two
strips on volumetric fiber affected the increasing flexural strength and modulus of
FRC.
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