Effect of thermal aging on microhardness of fluoride-containing materials

• Published in: International dental journal 2024-10, Vol.74, p.S152-S152
• Main Author: Ilisulu, Sabiha Ceren
• Format: Article
• Language: English
• ISSN: 0020-6539
• DOI: 10.1016/j.identj.2024.07.1039

The aim of this in vitro study was to evaluate the thermal aging effect on microhardness of fluoride containing materials. In this study, Cention N (Ivoclar Vivadent), Beautifil II (Shofu, Kyoto, Japan) and Fuji IX GP (GC GC, Tokyo, Japan) were used. 30 samples were prepared in Teflon mold of 8-mm diameter and 2-mm height according to manufacturer's instruction. Before and after thermal aging procedure, Vickers microhardness (n=24) was measured and surface characteristics (n=6) were examined using scanning electron microscopy (SEM). Statistical analysis was performed using One-Way ANOVA, Tukey HDS and Kruskal Wallis test. The level of significance was set at p < 0.05. Before thermal aging, the microhardness values of the groups showed a significant difference (p=0.001): Cention N (52,36±2,55)> Beautiful II (41,71±5,23)> Fuji IX GP (20,91±1,73). The microhardness values after the thermal aging were respectively as Cention N (45,98±3,64)> Beautiful II (32,97±6,98)> Fuji IX GP (10,81±2,88) and there was a statistically significant difference between them (p=0.001). The highest microhardness value was in Cention N, while the lowest value was in Fuji IX GP before and after thermal aging. In Cention N (p=0.001), Beautiful II (p=0.016) and Fuji IX GP (p=0.001) groups, the decrease in microhardness values after the thermal aging compared to before the thermal aging was statistically significant. Cention N had highest microhardness value before and after thermal aging. Thermal aging procedure had an affect on microhardness of fluoride containing materials.