Edelmann André, Dubis Monique, Hellmann Ralf
Applied Laser and Photonics Group, University of Applied Sciences Aschaffenburg, 63743 Aschaffenburg, Germany.
Materials (Basel). 2020 Dec 18;13(24):5786. doi: 10.3390/ma13245786.
We report on the exemplified realization of a digital to physical process chain for a patient individualized osteosynthesis plate for the tarsal bone area. Anonymized patient-specific data of the right feet were captured by computer tomography, which were then digitally processed to generate a surface file format (standard tessellation language, STL) ready for additive manufacturing. Physical realization by selective laser melting in titanium using optimized parameter settings and post-processing by stress relief annealing results in a customized osteosynthesis plate with superior properties fulfilling medical demands. High fitting accuracy was demonstrated by applying the osteosynthesis plate to an equally good 3D printed bone model, which likewise was generated using the patient-specific computer tomography (CT) data employing selective laser sintering and polyamid 12. Proper fixation has been achieved without any further manipulation of the plate using standard screws, proving that based on CT data, individualized implants well adapted to the anatomical conditions can be accomplished without the need for additional steps, such as bending, cutting and shape trimming of precast bone plates during the surgical intervention. Beyond parameter optimization for selective laser melting, this exemplified digital to physical process chain highlights the potential of additive manufacturing for individualized osteosynthesis.
我们报告了针对跗骨区域患者个性化接骨板的数字到物理过程链的示例实现。通过计算机断层扫描获取右脚的匿名患者特定数据，然后对其进行数字处理以生成适用于增材制造的表面文件格式（标准镶嵌语言，STL）。使用优化的参数设置通过选择性激光熔化进行物理实现，并通过消除应力退火进行后处理，从而得到具有满足医疗需求的卓越性能的定制接骨板。将接骨板应用于同样使用患者特定计算机断层扫描（CT）数据通过选择性激光烧结和聚酰胺12生成的同样良好的3D打印骨模型，证明了高拟合精度。使用标准螺钉无需对接骨板进行任何进一步操作即可实现正确固定，这证明基于CT数据，无需在手术干预期间对预制骨板进行弯曲、切割和形状修整等额外步骤，就可以制造出非常适合解剖条件的个性化植入物。除了对选择性激光熔化的参数优化外，这个示例性的数字到物理过程链突出了增材制造在个性化接骨方面的潜力。
