The level of residual monomer in self-curing denture-base materials

Area of Science:

• Dental Materials Science
• Polymer Chemistry

Background:

• Residual monomers in acrylic denture bases can lead to tissue irritation and adverse reactions.
• Self-curing acrylics are widely used but their monomer content requires careful evaluation.

Purpose of the Study:

• To quantify and compare residual monomer levels in two types of self-curing acrylic denture-base materials.
• To assess the influence of section thickness on residual monomer content.

Main Methods:

• Gas-liquid chromatography (GLC) was employed to analyze residual monomer content.
• Two self-curing acrylic materials (compression and pourable types) were tested.
• Different section thicknesses were analyzed to determine their effect.

Main Results:

• Both self-curing acrylic materials exhibited higher residual monomer levels than heat-cured acrylics.
• Thicker sections of the acrylic materials demonstrated lower residual monomer concentrations compared to thinner sections.
• The pourable self-curing acrylic material presented lower residual monomer levels than the compression-molded variety.

Conclusions:

• Self-curing acrylic denture-base materials contain higher residual monomer levels than heat-cured alternatives.
• Material handling and section thickness influence residual monomer levels, with thicker sections being preferable.
• Pourable self-curing acrylics may offer an advantage in terms of reduced residual monomer content compared to compression types.