The effect of different curing time on the impact strength of cold and hot-cure acrylic resin denture base material

Abstract EN

Objectives : This study aims to establish the effect of different curing times.

on the impact strength of cold- cure acrylic resin which cured in air and Ivomat curing machine then compare them with heat cure acrylic resin samples which cured in compression molding technique . Methodology : Eighty acrylic resin specimens were prepared (40 cold cure and 40 heat cure), the study contain 8 groups depending on the type of the processing method and processing time, (10 specimens) were used for each test group, then evaluate the effect of them on the impact strength of acrylic resin denture base material.

Results : The result obtained in the present study showed significant difference between most of the tested groups.

However the tested group that cured in 70°C for 9 hours showed the highest impact strength mean value in regarding to heat cure acrylic resin.

While the test group which cured in Ivomat curing machine for 45minut showed the highest impact strength mean value in regarding cold cure acrylic resin Conclusion : It can be concluded that heat- cure acrylic resin had better impact strength than cold-cure acrylic resin, and the curing time had a significant effect on the impact strength of both heat and cold–cure acrylic resin.