Assist. Prof. Prosthetic Dental Technologies Department College of Health and Medical Technology, Middle Technical University, Baghdad, Iraq
Online published on 27 March, 2020.
Silver nanoparticles are attracting interest as antibacterial and antimicrobial agents as incorporating materials into PMMA denture resin, but the need for application without side effects on resin properties is essential. This study was oriented to investigate the addition of silver nano-fillers(AgNPs)and aging on tensile strength of acrylic resin polymerized by two techniques water bath and autoclave.
120specimens made of heat-cured acrylic were divided into two main groups depending on curing methods water-bath and autoclave processing technique, and then each group was subdivided into experimental groups according to the addition of silver nano-fillers in two concentration(0.2% and 2%AgNPs)and control groups(0%AgNPs). Each subgroup was divided into 2groups according to the period of immersion in distilled water(1day and 1month)with(N= 10).The WDW200Esteel tensile strength tester was used for measuring the tensile strength for all groups. Data were statistically analyzed using Oneway ANOVA-test and Independent t-test to detect the significant different among tested and control groups at significance level (P≤0.05).
A highly significant decrease in tensile strength was observed with the addition of silver nanofillers to PMMA. According to curing methods, the results showed that there wasnon-significant difference of curing in water-bath and autoclave technique. In addition, by aging specimens for one month period, there was a highly significant decreasein the tensile strength of acrylic in all groups.
The addition of AgNPs to acrylic lead to reduction of its tensile strength. No change in the tensile strength by using autoclave method for acryliccuring. In addition, the prolong storage period was reduced tensile strength of the resin.
AgNPs, heat-cured acrylic, aging, autoclave, tensile strength
