Abstract
Aims: To evaluate the effect of some commercially available new denture cleansers on the hardnessof acrylic denture base and teeth materials. Materials and method: Samples were preparedfrom heat cured acrylic resin denture base material and teeth. After that, half of the samples foreach group were immersed for ½ hr per day in the denture cleanser throughout one month, theother half of the samples immersed for 8 hr per day in the denture cleanser through one month.The denture cleansers used are three solutions prepared freshly everyday for immersion of thesamples. The hardness of the samples were tested by using Vickers hardness tester, the mean istaken for each group and evaluated by using one way analysis of variance test and Duncan's multiplerange test to compare the groups. Results: The results demonstrated that there were significantdifferences in the hardness of acrylic resin denture base material with different denturecleansers and duration of immersion (P < 0.0001), and there were significant differences in thehardness of acrylic resin teeth with different denture cleansers and duration of immersion (P <0.0001). The results also revealed that the cross linked teeth had a higher hardness value than theacrylic resin teeth. Conclusions: The type of denture cleanser and duration of immersion had aneffect on the surface hardness of acrylic resin teeth and denture base materials. The cross linkingof acrylic resin materials increase the resistance of the material to the action of solvents.
