Alnafaiy Sarah M, Labban Nawaf, Aldegheishem Alhanoof Saleh, Alhijji Saleh, Albaijan Refal Saad, AlResayes Saad Saleh, Alsultan Rafa Abdulrahman, Alrossais Abeer Mohammed, Alanazi Rahaf Farhan
Department of Clinical Dental Sciences, College of Dentistry, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia.
Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, P.O. Box 60169, Riyadh 11545, Saudi Arabia.
Materials (Basel). 2025 Aug 22;18(17):3942. doi: 10.3390/ma18173942.
This study aimed to assess the effect of acidic storage and simulated brushing on the translucency and color stability of 3D-printed resins for prosthodontic applications. Three 3D printed resin materials-Ceramic Crown (CC), OnX (ONX), and Tough 2 (T2)-were compared with a CAD/CAM milled nano-ceramic resin material (Lava Ultimate, LU). Twelve specimens were fabricated from each material and were allocated into two groups based on the storage medium (water or citric acid), followed by simulated tooth brushing for 3650 cycles. The specimens' translucency (TP) and color stability (ΔE) were determined using a spectrophotometer. The data was compared using ANOVA, independent student t-tests, and a post hoc Tukey test ( < 0.05). Multiple comparisons of mean differences in TP revealed significant differences between the tested materials ( < 0.001), except for groups CC and ONX. Irrespective of the groups, all materials showed decreased TP values after simulated tooth brushing. Regarding color stability, CC (0.66 ± 0.42) and T2 (1.40 ± 0.34) in acid demonstrated the least and greatest color changes, respectively. The ΔE did not vary between the materials or between the storage media ( > 0.05). Except for T2 and LU in water, the other materials showed ΔE values below the perceptibility threshold of 1.2. The material type and storage media affected the translucency of the tested materials. However, regardless of the material type and storage media, there was no discernible impact on the color change of the tested materials.
本研究旨在评估酸性储存和模拟刷牙对用于口腔修复的3D打印树脂的透明度和颜色稳定性的影响。将三种3D打印树脂材料——陶瓷冠（CC）、OnX（ONX）和坚韧2（T2）——与一种CAD/CAM铣削纳米陶瓷树脂材料（Lava Ultimate，LU）进行比较。每种材料制作12个试件，并根据储存介质（水或柠檬酸）分为两组，然后进行3650次模拟刷牙。使用分光光度计测定试件的透明度（TP）和颜色稳定性（ΔE）。数据采用方差分析、独立样本t检验和事后Tukey检验进行比较（<0.05）。TP平均差异的多重比较显示，除CC组和ONX组外，受试材料之间存在显著差异（<0.001）。无论组别如何，所有材料在模拟刷牙后TP值均降低。关于颜色稳定性，酸中的CC（0.66±0.42）和T2（1.40±0.34）分别显示出最小和最大的颜色变化。材料之间或储存介质之间的ΔE没有差异（>0.05）。除水中的T2和LU外，其他材料的ΔE值均低于可察觉阈值1.2。材料类型和储存介质影响受试材料的透明度。然而，无论材料类型和储存介质如何，对受试材料的颜色变化均无明显影响。
