فهرست نشریات علمی دسترسی آزاد ایران

The purpose of this study is to assess the impact of incorporation of Zirconia-Yttria (ZrO2-3Y) nanoparticles on certain mechanical properties of A-2186 maxillofacial silicone elastomer, such as tear strength, tensile strength and elongation percentage. A-2186 Platinum silicone elastomer was modified by adding ZrO2-3Y nano powder at two weight percentages (1% and 1.5%). A total of 60 specimens were prepared and subsequently divided into three groups: two experimental groups (1% and 1.5% ZrO2-3Y) and one control group. Each group was further subdivided into three identical subgroups in accordance with the testing that was intentionally conducted. Ten specimens were employed for each test (tear strength, tensile strength test and elongation percentage). A one-way ANOVA followed by Tukey’s HSD post-hoc test was conducted after confirming homogeneity of variance, with a significance level of p < 0.05. Both experimental groups (1% and 1.5% of ZrO2-3Y) revealed a highly significant increase in tear strength compared to control group. Additionally, the 1.5% ZrO2-3Ysilicone group showed a significant improvement in tear strength compared to the 1% ZrO2-3Y group. Regarding tensile strength, groups (1% and 1.5% ZrO2-3Y) exhibited a significant increase in tensile strength compared to the unmodified silicone group (p < 0.05). A non-significant difference was also noted between group (1% ZrO2-3Y) and group (1.5% ZrO2-3Y). On the other hand, both groups (1% and 1.5% ZrO2-3Y) showed a highly significant decline in their percentage of elongation compared to the control group.  The addition of ZrO₂-3Y nanoparticles to A-2186 platinum silicone significantly enhanced tear and tensile strengths, but led to a notable reduction in elongation, indicating a trade-off between mechanical strength and flexibility.