The Effect of Pineapple Juice (Ananas comosus (L.) Merr.) on the compressive strength of nanofiller composite resin

Background Nanofiller composite Resin is the result of the latest developments using nanotechnology, has mechanical advantages such as compressive strength, tensile, and fracture and wear resistance, but this resin is hydrophilic so it can absorb water. Absorption of water containing acid has the potential to decrease the compressive strength of composite resins. Objective: To determine the effect of soaking pineapple juice (Ananas comosus L. Merr) with concentrations of 25%, 50%, 75% and 100% to decrease the compressive strength of the composite resin nanofiller. Research Method: This study used post test control group design. The sampling method used 4 groups of samples each group, consisting of 6 groups, namely 4 treatment groups and 2 control groups. The treatment group consisted of pineapple fruit juice (Ananas comosus L. Merr) concentration of 25%, 50%, 75% and 100% and the control group consisted of a positive control group (distilled water) and negative control (no treatment). The next step is to test the compressive strength of each group using a universal testing machine, then the test data is analyzed using a one-way ANOVA test with the condition that the data must be normal and homogeneous, one-way ANOVA test requirement sig value < 0.05. Results: Based on the analysis using One-Way Anova obtained sig value = 0.000, which means there is a significant difference between the group with the group that has the lowest. compressive strength value at immersion with a concentration of 100%. Conclusion: There is a decrease in the compressive strength of nanofiller composite resin in pineapple juice immersion (Ananas comosus L. Merr) with a group that has the lowest value of compressive strength at immersion with a concentration of 100%.