Kekuatan Transversal Resin Akrilik Polimerisasi Panas Ditambahkan Serbuk Nanopartikel Serat Batang Pisang Barangan (Musa acuminata Colla) Yang Dialkalisasi dan Diwarnai

Abstract

Heat-cured acrylic resin is the polymer of choice for denture bases, but it is often subject to cracking and fracture. The addition of fibers to acrylic resins has been investigated to improve mechanical properties including transverse strength. The purpose of this study is to determine the differences in transversal strength of heat-cured acrylic resin after the addition of alkali-treated and dyed banana stem fiber nanoparticle powder at concentrations of 0.5%, 1%, and 1.5% by weight. The sample is a plate-shaped heat-cured acrlic resin (64 x 10 x 3,5 mm). A total of 40 specimens (n=10 per group) were divided into four groups: Without fiber addition, 0.5% nanoparticle powder of barangan banana stem fiber by weight, 1% nanoparticle powder of barangan banana stem fiber by weight, and 1.5% nanoparticle powder of barangan banana stem fiber by weight, added to the acrylic resin powder. Banana stems alkali-treated with 5% NaOH for 1 hour, dyed with 15% red dragon fruit extract, ground, dried, and processed using ball milling. After finish proses ball milling do the Praticle Size Analyzer. Transverse strength testing using a Universal Testing Machine with a load of 50Kgf. The mean and standard deviation values of Tranverse Stength for Groups I, II, III, and IV were 120,81±3,396 MPa; 150,36±3,265 MPa; 162,59±2,685 MPa dan 174,69±4,857MPa. Statistical analysis using one-way ANOVA showed a significant difference in Tranverse Strength among the groups after the addition of banana stem fiber nanopowder at concentrations of 0,5%, 1% and 1,5% by weight, with a p-value of 0.000 (p<0.05). The results of the posthoc test showed significant differences (p<0.05) between the control group with concentrations of 0.5%, 1%, and 1.5%, between concentrations of 0.5% with concentrations of 1% and 1.5%, and between concentrations of 1% with 1.5% which were significant (p=0.000; p<0.05). Thus, it is concluded that the transverse strength of heat-cured acrylic resin after the addition of Barangan banana stem fiber nanoparticle powder is higher than without the addition of Barangan banana stem fiber nanoparticle powder, and the higher the concentration of Barangan banana stem fiber nanoparticle powder added, the higher the transverse strength of the hot polymerized acrylic resin produced.