Fouda Shaimaa M, Gad Mohammed M, El-Din Mai Salah, Khan Soban Q, Othman Ahmed, von See Constantin
Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Eastern Province, Saudi Arabia.
Department of Prosthodontics, Alexandria University Main Hospital, Alexandria, Egypt.
Int J Dent. 2025 Jul 25;2025:5177847. doi: 10.1155/ijod/5177847. eCollection 2025.
To investigate and compare the impact of different nanoparticles (NPs) on the color stability and surface properties of additively fabricated (AF) denture base resins after thermal cycling. Two hundred specimens ( = 10) were AF from NextDent and ASIGA denture base resins. Specimens were divided into four groups according to the added NP's type and concentration: nanodiamond (ND; 0.25% and 0.5%), silicon dioxide NPs (NS; 0.25% and 0.5%), and a control group of pure resin of each material. The color change (∆ ), surface roughness, and hardness were tested after thermal cycling (5000 cycles). Data were analyzed using ANOVA and post hoc Tukey's tests ( = 0.05). The ∆ was affected by the NP type and material type, while the NPs concentration showed no effect. ND showed higher ∆ with NextDent in all groups ( < 0.05) in comparison to NS. Color change of ASIGA with ND and NS was higher than that of NextDent, ∆ values of all tested groups were below 3.7 NBS. For NextDent, 0.5% NS showed significantly the highest hardness values (25.9 ± 4.6 VHN) followed by 0.5% ND (18.7 ± 2.4 VHN). For hardness, NextDent 0.5% NS showed significant increase when compared with ASIGA ( < 0.001). For roughness, NextDent 0.5% NS showed significantly less Ra than other groups. In term of materials comparison per NP type, significant differences in Ra between ASIGA and NextDent was detected. The effect of NP on the tested properties is concentration dependent and material dependent therefore, NP type, NP concentrations, and material type selection should be considered for AF nanocomposite denture base fabrication.
研究并比较不同纳米颗粒（NPs）对热循环后增材制造（AF）义齿基托树脂颜色稳定性和表面性能的影响。从NextDent和ASIGA义齿基托树脂中增材制造200个试样（n = 10）。根据添加的NP类型和浓度将试样分为四组：纳米金刚石（ND；0.25%和0.5%）、二氧化硅纳米颗粒（NS；0.25%和0.5%），以及每种材料的纯树脂对照组。热循环（5000次循环）后测试颜色变化（∆E）、表面粗糙度和硬度。使用方差分析和事后Tukey检验（α = 0.05）分析数据。∆E受NP类型和材料类型影响，而NP浓度无影响。与NS相比，所有组中ND与NextDent相比均显示出更高的∆E（P < 0.05）。ASIGA与ND和NS的颜色变化高于NextDent，所有测试组的∆E值均低于3.7 NBS。对于NextDent，0.5% NS显示出显著最高的硬度值（25.9 ± 4.6 VHN），其次是0.5% ND（18.7 ± 2.4 VHN）。对于硬度，NextDent 0.5% NS与ASIGA相比显著增加（P < 0.001）。对于粗糙度，NextDent 0.5% NS显示出的Ra显著低于其他组。就每种NP类型的材料比较而言，检测到ASIGA和NextDent之间Ra存在显著差异。NP对测试性能的影响取决于浓度和材料，因此，在增材制造纳米复合义齿基托时应考虑NP类型、NP浓度和材料类型的选择。
