Surface Roughness and Color Change of Gamma Irradiated Nanohybrid Resin Composite and Giomer Restorative Materials | ||
| Egyptian Journal of Radiation Sciences and Applications | ||
| Volume 38, Issue 1, December 2025, Pages 63-74 PDF (965.89 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejrsa.2025.373138.1182 | ||
| Author | ||
| Engy Abaza* | ||
| lecturer, Health Radiation Research Department, National Centre for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt | ||
| Abstract | ||
| Background: The impact of gamma radiation on color stability and surface roughness of Nanohybrid composites and Giomer is essential to investigate for clinical success of these materials. Objective: The goal of this in vitro study was to examine the surface roughness and color change of nano-hybrid resin composites and Giomer restorative materials subjected to gamma radiation. Materials and Methods: A total number of 40 disc-shaped specimens were made, twenty of which were made from Filtek Z-350/ 3M ESPE, Nanohybrid composite and the other twenty were made from Beautiful II/ Shofou, Giomer restorative materials. Ten subgroups of each material were created: the non-irradiated group (control) and the gamma-irradiated group. After being stored in artificial saliva for 24 hours and 6 months, the materials' surface roughness and color change were evaluated using a digital microscope for roughness and a Spectrophotometer (ΔE) for color. Results: After six months, the Giomer control group had the highest surface roughness, while the Giomer irradiated group had the lowest after twenty-four hours. The Giomer group, stored for 6 months, experienced the highest color change, followed by the Nanocomposite group at the same storage period then Giomer group at twenty-four hours storage, respectively. The Nanocomposite group experienced the least color change after twenty-four hours. Conclusion: The surface roughness and color stability of both materials in this study were adversely impacted by time. Gamma radiation, on the other hand, improved the color stability of both tested materials and had a beneficial effect on Giomer's surface roughness. | ||
| Keywords | ||
| Gamma radiation; Nano-composite; Giomer; surface roughness; color change | ||
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