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Crossliked plastic denture teeth have been used clinicaly in order to improve the poor wear resistance of conventional acrylic denture teeth. We suggest that highly crosslinked denture teeth are possibly disadvantaged compared with conventional ones, when considering the adhesion to denture base and impact resistance. The purpose of this study is to evaluate the impact resistance of crosslinked and conventional plastic denture teeth and porcelain teeth. The impactions were given repeatedly to the central fossae of the artificial teeth with the impact test machine. The thickness were 1.4, 1.0 and 0.4mm. The numbers prior to fracture were read as the impact resistance. The results of the impact tests showed the highly crosslinked denture teeth became weak according to decrease of thickness but they showed the same toughness as the conventional ones when they were thicker than 1.4mm. It was evident that the denture base resin beneath the artificial teeth plays the role of shock absorber against the impaction.

The evaluation of the impact resistance of crosslinked plastic denture teeth.