The aim of this study was to analyse leachable monomers, additives, and degradation products from polymer-based orthodontic base-plate materials.

Polymeric composite materials may contain releasable degradation products or unreacted constituents. Release of formaldehyde from nine different composites was investigated

The release of formaldehyde in an aqueous environment at 37 degrees C from the surface of heat-polymerized, and auto-polymerized dough and pour type acrylic denture base materials was determined quantitatively.