3D printing allows the fabrication of ceramic implants, making a personalized approach to patients’ treatment a reality. In this work, we have tested the applicability of the Function Representation (FRep) method for geometric simulation of implants with complex cellular microstructure. For this study, we have built several parametric 3D models of 4 mm diameter cylindrical bone implant specimens of four different types of cellular structure. The 9.5 mm long implants are designed to fill hole defects in the trabecular bone. Specimens of designed ceramic implants were fabricated at a Ceramaker 900 stereolithographic 3D printer, using a commercial 3D Mix alumina (Al₂O₃) ceramic paste. Then, a single-axis compression test was performed on fabricated specimens. According to the test results, the maximum load for tested specimens constituted from 93.0 to 817.5 N, depending on the size of the unit cell and the thickness of the ribs. This demonstrates the possibility of fabricating implants for a wide range of loads, making the choice of the right structure for each patient much easier.

中文翻译：

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基于激光立体光刻的3D打印复杂形状陶瓷骨植入物的设计与制作

3D打印允许制造陶瓷植入物，从而使个性化的患者治疗方法成为现实。在这项工作中，我们已经测试了功能表示（FRep）方法在具有复杂细胞微结构的植入物的几何模拟中的适用性。对于本研究，我们建立了几种参数化3D模型，这些直径4mm直径的圆柱形骨植入物标本具有四种不同类型的细胞结构。9.5毫米长的植入物旨在填充小梁骨中的孔缺损。使用商用3D混合氧化铝（Al ₂ O _3）在Ceramaker 900立体光刻3D打印机上制造设计的陶瓷植入物的样品）陶瓷浆。然后，对制成的样品进行单轴压缩试验。根据测试结果，测试样品的最大载荷为93.0到817.5 N，具体取决于晶胞的尺寸和肋骨的厚度。这证明了在各种负荷下制造植入物的可能性，使为每个患者选择合适的结构变得更加容易。