Year : 2020

Volume : Volume 11

Issue : Issue 3

Address for correspondence :
Dr. Puttaraj T. Kattimani.
PuttarajTKattimani@gmail.com

Abstract

Aim:  The aim of the study was to evaluate and compare the chemically and mechanically modified heat polymerized acrylic resin for transverse strength. Materials & Methodology: Seventy-five acrylic test specimens were divided into 5 groups (n=15/Group). Group A: Unmodified resin group, Group B: Stainless steel mesh reinforcement group, Group C: Glass fibre mesh reinforcement group, Group D: Silanized alumina nanoparticles reinforcement group and Group E: Multi-walled carbon nanotubes (MWCNTs) reinforcement group. Transverse strength was measured using Universal testing machine. The data were analyzed using 1 way ANOVA and subsequent multiple comparisons between the unmodified and modified resin groups were performed using Post hoc comparison with Bonferroni correction test. Results: One way analysis of variance and multiple comparisons using post hoc comparison test revealed a significant difference among test groups (p<0.01), except Group A and Group B. The transverse strength was higher for MWCNTs reinforced group followed by Glass fibre mesh, Silanized alumina nanoparticles, Stainless steel mesh. The least transverse strength was shown by unmodified resin group. Conclusion: Within the limitations of this invitro study it was concluded that all reinforcing materials enhance the transverse strength. Polymethylmethacrylate (PMMA) reinforced with MWCNTs showed the highest transverse strength value followed by the PMMA reinforced with glass fibre mesh, then silanized alumina nanoparticles and stainless-steel mesh. The least transverse strength was observed in the unmodified PMMA group.

Keywords: Transverse Strength Test, Multiwalled Carbon Nanotubes, Silanized Alumina Nanoparticles, Glass Fibre Mesh.