Znaczko Aleksander, Żerdzicki Krzysztof, Kłosowski Paweł
Department of Structural Mechanics, Faculty of Civil and Environmental Engineering, Gdansk University of Technology, 80-233 Gdansk, Poland.
Materials (Basel). 2025 May 9;18(10):2187. doi: 10.3390/ma18102187.
This paper presents the process of preparing and conducting a uniaxial compression test, developing the results, and determining the compressive strength of a femur made using 3D printing technology. The study considers the variable thickness of the outer layer-imitating cortical bone tissue-and the varying density of the inner layer-imitating trabecular bone tissue-which, with further analysis, may aim to replicate different states of osteoporosis. The compressive strength of the bones varied depending on the thickness of the outer layer and the filling degree. Failure patterns were observed, corresponding to different variants of the produced bones. The predominant failure pattern was the fracture of the femoral head or neck at the proximal end of the femur. The results were compared with previous studies on commercial femur bones, as well as those created using 3D printing technology by other authors. The highest compressive strength was found in the bone with an outer layer thickness of 3.0 mm and 30% infill, with a value of 4778 N. A very similar compressive strength was recorded for the bone with an outer thickness of 2.1 mm and 30% infill, reaching 4519 N. The lowest compressive strength, 2116 N, was observed in the bone with an outer thickness of 1.2 mm and 20% infill.
本文介绍了制备和进行单轴压缩试验、分析试验结果以及确定采用3D打印技术制造的股骨抗压强度的过程。该研究考虑了模仿皮质骨组织的外层厚度变化以及模仿小梁骨组织的内层密度变化，通过进一步分析，旨在复制骨质疏松症的不同状态。骨骼的抗压强度随外层厚度和填充度的不同而变化。观察到了与所制造骨骼的不同变体相对应的失效模式。主要的失效模式是股骨近端的股骨头或颈部骨折。将结果与先前关于商用股骨以及其他作者使用3D打印技术制造的股骨的研究进行了比较。在外层厚度为3.0毫米且填充度为30%的骨骼中发现了最高抗压强度，数值为4778牛。在外层厚度为2.1毫米且填充度为30%的骨骼中记录到了非常相似的抗压强度，达到4519牛。在外层厚度为1.2毫米且填充度为20%的骨骼中观察到了最低抗压强度，为2116牛。
