Effects of silanized nano-Al₂O₃ fillers on the mechanical properties and printing accuracy of photopolymer resins for 3D printing dental applications

IF 2.5 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Express Pub Date : 2025-08-01 DOI:10.1088/2053-1591/adf709

Shijun Ji, Jingyi Ren, Jing Zhang, Wenjuan Zhou, Zhonghao Liu

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引用次数: 4

Abstract

Abstract Three-dimensional (3D) printing dental applications are broadly applied in multiple specialties of dentistry facilitating diagnosis and treatment greatly. However, the current photopolymer materials for 3D printing dental applications often fail to yield the required quality due to their inferior mechanical properties. Thus, this study aims to explore the effects of silanized nano-Al 2 O 3 fillers on the mechanical properties and printing accuracy of one of the most commonly used photopolymer resins, polyurethane acrylate (PUA). The modification of nano-Al 2 O 3 particles by the silane coupling agent was characterized by Fourier-transform infrared spectroscopy (FTIR) and thermogravimetric (TGA) analysis. Then, specimens were fabricated using PUA resins with 0 wt% (control), 2 wt%, 4 wt%, and 6 wt% silanized nano-Al 2 O 3 fillers. The effects of silanized nano-Al 2 O 3 fillers on the mechanical properties of the photopolymer resins were evaluated by Shore D hardness, tensile strength, and flexural strength tests. Moreover, the printing accuracy was assessed by the root-mean-square error (RMS) analysis. The results showed that the mechanical properties of the photopolymer resins were significantly improved when loaded with silanized nano-Al 2 O 3 fillers. The highest values were observed in the resin with 4 wt% filler content, improving hardness, tensile strength, and flexural strength by 11.7%, 31.1%, and 39.9%, respectively. For printing accuracy, loading 2 wt% and 4 wt% fillers did not influence the printing accuracy significantly. However, the incorporation of 6 wt% fillers compromised the printing accuracy. Within the limits, this study has demonstrated that the incorporation of silanized nano-Al 2 O 3 fillers can enhance the mechanical performance of photopolymer resins, indicating the potential of this material for improved quality of 3D printing dental applications.

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硅化纳米al2o3填料对牙科3D打印光聚合物树脂力学性能和打印精度的影响

三维打印牙科应用广泛应用于牙科的多个专业，极大地方便了诊断和治疗。然而，目前用于牙科3D打印应用的光聚合物材料由于其较差的机械性能往往无法产生所需的质量。因此，本研究旨在探讨硅烷化纳米al2o3填料对最常用的光聚合物树脂之一聚氨酯丙烯酸酯（PUA）的机械性能和打印精度的影响。采用傅里叶变换红外光谱（FTIR）和热重分析（TGA）对硅烷偶联剂对纳米al2o3的改性进行了表征。然后，用含有0 wt%（对照）、2 wt%、4 wt%和6 wt%硅化纳米al 2o3填料的PUA树脂制备样品。通过邵氏硬度、拉伸强度和弯曲强度测试，考察了硅化纳米al2o3填料对光聚合物树脂力学性能的影响。采用均方根误差（RMS）对打印精度进行评价。结果表明，负载硅化纳米al2o3填料后，光聚合物树脂的力学性能得到了显著改善。当填料含量为4 wt%时，树脂的硬度、抗拉强度和抗弯强度分别提高了11.7%、31.1%和39.9%。对于打印精度，添加2 wt%和4 wt%的填料对打印精度没有显著影响。然而，6 wt%填料的掺入损害了印刷精度。在限制范围内，本研究表明，硅化纳米al 2o3填料的掺入可以增强光聚合物树脂的机械性能，这表明该材料在提高牙科3D打印应用质量方面具有潜力。

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来源期刊

Materials Research Express MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

4.50

自引率

4.30%

发文量

640

审稿时长

12 weeks

期刊介绍： A broad, rapid peer-review journal publishing new experimental and theoretical research on the design, fabrication, properties and applications of all classes of materials.

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