Document Type : Original Articles

Abstract

Introduction: An important disadvantage of acrylic resin artificial teeth is their wear, which poses problems for patients. This study compared wear resistance of three Iranian brands of acrylic resin teeth with Ivoclar foreign brand, approved by ADA. Materials and Methods: In this experimental study, one foreign brand, Ivoclar, and three Iranian brands, Surperberelian, Yaghoot and Naturaldent, were comparatively evaluated. Seven samples from each brand were prepared. All the wear tests were performed in an environment with natural saliva by the use of porcelain abrading surfaces under the vertical force of 3 pounds. Each sample’s height was measured before and after 5000 and 10000 wear cycles with a micrometer with 0.002-mm accuracy. Statistical analyses by SPSS soft ware and were carried out with one-way ANOVA, Tukey test, and paired samples t-test. Results: There were no significant differences between the average wear rates of Superberelian and Ivoclar (p value = 0.899), and between Yaghoot and Naturaldent teeth (p value = 0.728) in 5000 wear cycles; however, in 10000 wear cycles average wear rates of all the brands increased, with the least and most increases in Yaghoot and Naturaldent, respectively. There were no significant differences between Superberelian and Ivoclar teeth in this cycle (p value = 0.784); however, there were significant differences between other brands (p value < 0.05). Among the Iranian brands, Superberelian and Naturaldent showed the least and the highest wear rates, respectively. Conclusion: The results showed that wear resistance of Superberelian teeth is similar to that of Ivoclar (approved by ADA).   Key words: Acrylic resin Artificial teeth, Wear.