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不同铺层方向下增材制造氧化锆的机械和表面性能。

Mechanical and surface properties of additive manufactured zirconia under the different building directions.

机构信息

Division of Fixed Prosthodontics, Department of Restorative & Biomaterials Sciences, Meikai University School of Dentistry, Japan.

Department of Dental Materials Sciences, School of Life Dentistry at Tokyo, The Nippon Dental University, Japan.

出版信息

J Prosthodont Res. 2023 Jul 31;67(3):410-417. doi: 10.2186/jpr.JPR_D_22_00166. Epub 2022 Dec 19.

Abstract

PURPOSE

This study investigates the mechanical and surface properties of zirconia manufactured using additive manufacturing (AM) technology and the effect of the building direction on the mechanical and surface properties.

METHODS

Specimens were prepared using ZrO paste (3DMix ZrO; 3DCeram) and a three-dimensional printing system (CeraMaker 900; 3DCeram) based on the principles of stereolithography (SLA). The mechanical properties (flexural strength, Vickers hardness, fracture toughness, elastic modulus, and Poisson's ratio) and surface properties (chemical composition and surface observation) were evaluated for three building directions (parallel, diagonal, and perpendicular) to investigate the relationship between the building directions and the anisotropy of the mechanical and surface properties of SLA-manufactured zirconia. Statistical analysis was performed using a one-way analysis of variance and Tukey's honestly significant difference test.

RESULTS

The highest flexural strength was obtained for a perpendicular building direction. The flexural strength was significantly higher in the perpendicular direction than in the parallel and diagonal directions; it was also significantly higher in the diagonal direction than in the parallel direction (P<0.05). The Vickers hardness, fracture toughness, elastic modulus, Poisson's ratio, and chemical composition did not differ significantly. Microstructural observations revealed that the layers, large crystals, and pores were more prominent in the parallel direction.

CONCLUSIONS

The flexural strength and surface structure of the tested SLA-manufactured zirconia were influenced by the building direction; however, other mechanical properties remained unaffected. The layer boundaries affected the anisotropic behavior of the builds to a certain extent, owing to the layer-by-layer production method.

摘要

目的

本研究调查了使用增材制造(AM)技术制造的氧化锆的机械和表面性能,以及构建方向对机械和表面性能的影响。

方法

使用 ZrO 糊(3DMix ZrO;3DCeram)和基于立体光刻(SLA)原理的三维打印系统(CeraMaker 900;3DCeram)制备样品。评估了三种构建方向(平行、对角和垂直)的机械性能(弯曲强度、维氏硬度、断裂韧性、弹性模量和泊松比)和表面性能(化学成分和表面观察),以研究构建方向与 SLA 制造氧化锆的机械和表面各向异性性能之间的关系。使用单向方差分析和 Tukey Honestly 显著差异检验进行统计分析。

结果

垂直构建方向获得的弯曲强度最高。垂直方向的弯曲强度显著高于平行和对角方向;对角方向也显著高于平行方向(P<0.05)。维氏硬度、断裂韧性、弹性模量、泊松比和化学成分没有显著差异。微观结构观察表明,平行方向的层、大晶体和孔隙更为明显。

结论

测试的 SLA 制造氧化锆的弯曲强度和表面结构受构建方向的影响;然而,其他机械性能不受影响。由于逐层生产方法,层界在一定程度上影响了构建的各向异性行为。

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