Abstract
Fracture of acrylic resin teeth, especially those of anterior teeth from a maxillary denture, are not uncommon, although they unite chemically with denture base resin.The purpose of the present investigation was to analyse the causes of fracture in acrylic resin anterior teeth by utilizing a two-dimensional finite element method and to find a better method would prevent the fracture of acrylic resin anterior teeth.The following conclusion was noted:1. Ridge laps and necks of the teeth, at which the fracture are caused most frequently, tend to sustain the higher concentration of the tensile stress when the forces applied onto from the horizontal direction were the incisal edge of the acrylic resin teeth.2. The concentration of the tensile stress in the acrylic resin teeth with a S-pad, at which a part of the denture base allowed to partially extend onto the cingulum of the resin teeth, could be reduced in the ridge lap surface between the teeth and the denture base.
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