EFFECT OF SILANE COUPLING AGENT CONTENT ON MECHANICAL PROPERTIES OF HYDROXYAPATITE/POLY(METHYL METHACRYLATE) DENTURE BASE COMPOSITE

Authors : Jamal Moammar ALDABIB

Pages : 37-45

Doi:10.26900/jsp.5.1.04

View : 13 | Download : 7

Publication Date : 2021-02-15

Article Type : Research Paper

Abstract :In removable prosthodontics, polyinsert ignore into journalissuearticles values(methyl methacrylate); insert ignore into journalissuearticles values(PMMA); is the most suitable for the construction of denture bases. Intra-orally, the subjected stress intensity during the function accelerate the fracture of acrylic resin denture bases. Extra-orally, fracture occurs when dentures are accidentally dropped on a hard surface. The aim of the current study was to investigate the effect of coupling agent concentration on the mechanical properties of Hydroxyapatite/Polyinsert ignore into journalissuearticles values(methyl methacrylate); insert ignore into journalissuearticles values(HA/PMMA); denture base composite. The Hydroxyapatite insert ignore into journalissuearticles values(HA); treated with four different ratios insert ignore into journalissuearticles values(i.e. 0, 5, 7 and 10 wt%); of 3-insert ignore into journalissuearticles values(trimethoxysily); propyl methacrylate insert ignore into journalissuearticles values(γMPS); silane coupling agent was added into the PMMA matrix. The mechanical performance of the composite was evaluated by conducting fracture toughness, flexural and tensile tests. An improvement of 13.83% and 9.62% in the tensile and flexural strength respectively, was achieved. The tensile and flexural modulus of the composite increased by 19.04% and 12.5% respectively. A significant improvement of 29.26% in the fracture toughness was observed at 10 wt% of γ-MPS. 10 wt% of γ-MPS is the optimum amount of coupling agent for obtaining balanced mechanical properties
Keywords : Dental Composites, Denture Base materials, Poly methyl methacrylate, Mechanical Properties, Hydroxyapatite, Silane Coupling Agent