| Summary: | Fiber reinforced composite is a non metal dental material consisting of a
combination of polymer matrix and reinforcing fiber. Natural fiber has
experienced rapid growth in its use in FRC due to the low cost and renewability of
the fiber. Acidic conditions (H+) cause a decrease in the molecular mass of FRC
which reduces the mechanical strength. The aim of this study is to investigate the
influence of the degree of acidity in the tensile strength of FRC with Agave
sisalana.
The research material is a FRC with Agave sisalana consisting of flowable
composite matrices (Masterflow, Brazil) and Agave sisalana fiber (Balittas,
Malang). The study sample dimensions are 32 mm long, 10 mm width and 2 mm
thick, with a total of 12 pieces divided into 3 groups, namely: group 1 with
soaking medium of pH 2.4, group 2 with a medium of pH 4.9 and group 3 with
pH 7.4. Samples were soaked in the medium at 37º C for 7 days. The tensile
strength was measured by a universal testing machine and statistically analyzed
using ANOVA and LSD test.
The results showed that the average tensile strength of FRC with Agave
sisalana in group 1 was 10.580 ± 0.761 MPa, group 2 showed an average of
14.565 ± 0.407 MPa and group 3 yielded the result of 16.677 ± 0.457 MPa.
ANOVA test result showed that there was a significant effect of the tensile
strength on the immersion medium with pH of 2.4
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