To investigate the impact of radiotherapy on surface properties of restorative dental materials. A conventional resin composite—CRC (Aura Enamel), a bulk-fill resin composite—BFRC (Aura Bulk-fill), a conventional glass ionomer cement—CGIC (Riva self cure), and a resin-modified glass ionomer cement—RMGIC (Riva light cure) were tested. Forty disc-shaped samples from each material (8 mm diameter × 2 mm thickness) (n = 10) were produced according to manufacturer directions and then stored in water distilled for 24 h. Surface wettability (water contact angle), Vickers microhardness, and micromorphology through scanning electron microscopy (SEM) before and after exposition to ionizing radiation (60 Gy) were obtained. The data were statistically evaluated using the two-way ANOVA and Tukey posthoc test (p < 0.05). Baseline and post-radiation values of contact angles were statistically similar for CRC, BFRC, and RMGIC, whilst post-radiation values of contact angles were statistically lower than baseline ones for CGIC. Exposition to ionizing radiation statistically increased the microhardness of CRC, and statistically decreased the microhardness of CGIC. The surface micromorphology of all materials was changed post-radiation. Exposure to ionizing radiation negatively affected the conventional glass ionomer tested, while did not alter or improved surface properties testing of the resin composites and the resin-modified glass ionomer cement tested.

研究放射治疗对修复性牙科材料表面特性的影响。传统树脂复合材料—CRC（Aura Enamel）、填充树脂复合材料—BFRC（Aura Bulk-fill）、传统玻璃离子水门汀—CGIC（Riva自固化）和树脂改性玻璃离子水门汀—RMGIC（ Riva 光固化）进行了测试。 根据制造商的说明，从每种材料（直径 8 毫米 × 厚度 2 毫米）（n = 10）中制备40 个圆盘状样品，然后将其储存在蒸馏水中 24 小时。在暴露于电离辐射 (60 Gy) 之前和之后，通过扫描电子显微镜 (SEM) 获得表面润湿性（水接触角）、维氏显微硬度和显微形态。使用双向 ANOVA 和 Tukey posthoc 检验对数据进行统计评估（p < 0.05)。CRC、BFRC 和 RMGIC 接触角的基线和辐射后值在统计学上相似，而 CGIC 的接触角辐射后值在统计学上低于基线值。暴露于电离辐射在统计上增加了 CRC 的显微硬度，并在统计上降低了 CGIC 的显微硬度。所有材料的表面微形态在辐射后都发生了变化。暴露于电离辐射会对所测试的常规玻璃离聚物产生负面影响，而不会改变或改善所测试的树脂复合材料和树脂改性玻璃离聚物粘固剂的表面性能测试。