A simple method to obtain uniform thickness of acrylic resin around a grid strengthener embedded in a denture base

Abstract

The fracture of an acrylic resin denture base is an unresolved problem in removable prosthodontics. Midline fracture of an acrylic resin denture base, most commonly seen as flexural fatigue failure, results from cyclic deformation of the base during function. Sharp changes in contour, pin holes, inclusions, deep scratches, and residual processing stresses may all cause stress intensification. Various approaches, such as the use of metal bases, wires, bars, and high-impact acrylic resin may help reduce the incidence of midline fractures. A grid strengthener (Dentaurum, Pforzheim, Germany) for acrylic resin denture base is available in chromium-nickel, stainless steel, or gold-plated metal in thicknesses of 0.4 mm. Numerous round perforations, 2.5 mm in diameter, are purported to produce a good resin bond and thus reinforce the acrylic resin denture base. This aids in reducing the incidence of fracture of the acrylic resin denture base by preventing propagation of cracks and increasing fatigue resistance of the acrylic resin.