Characteristics Polymer for Denture Base Modified by Siwak Particles

Abstract

The goal of this research is to discuss the extent to which the mechanical properties of acrylic resins used in the denture base are improved after adding weight fractions of siwak particles (1%, 2 %, 3%, and 4%). Approximately 140 samples were prepared from PMMA resin with fillers using the "hand position" method. The mechanical properties of the samples were measured without the use of siwak particles and with the use of weight fractions (1%, 2%, 3%, and 4%) for the siwak particles, also the properties results data analyzed using Tukey tests by SPSS. The addition of 4% siwak particles to acrylic resins greatly increases the values of hardness, fracture toughness, flexural strength, and compressive strength (80.750+.3536 shore D, 2.2500+.15355 MPa.m^1/2, 79.50± 2.12 MPa, 88.00± 1.714 MPa) respectively. Whereas the value of elongation reduce through rise concentration weight fraction of siwak particles. The addition of 2% Siwak particles to acrylic resins greatly increases the values of tensile (38.350±1.3435 MPa) compard with other weight fraction. The addition of 3% siwak particles to acrylic resins greatly increases the values of impact (72.50±3.736 MPa) J/m²). Statistically, across all samples, very large variations were observed of hardness, tensile strength, fracture toughness, flexural strength, and compressive strength (sig 0.001, 0.05, 0.001, 0.019, 0.005, 0.001) respectively

Keywords: PMMA, Siwak particles, flexural strength, tensile strength, impact, compressive