Effect of Extruded Residual Monomer from Acrylic Dentures on Some of Their Properties

Abstract

This laboratory study was designed to investigate the effect of extraction of residual monomer from heat cured acrylic resin denture base material on some physical and mechanical properties: Transverse strength, Deflection at breakage, Density, Surface porosity, Water 'sorption and Water solubility.

A total of 672 heat cured acrylic resin samples were prepared of specified shape to suit the property under investigation using the short curing cycle.

The specimens were randomly divided to seven storage groups each group contained seventy two samples of different shapes (336 strips for mechanical properties and residual MMA estimation. And 336 disks for physical properties.

Ninety-six (96) samples were stored dry (dry group) while the remammg 576 samples were immersed in following extractors:

1-Methanol.

2-Ethanol"in 50% concentration.

3-Distilled water at room temperature(25°C and 50°C)