Additive Manufacturing of Biomechanically Tailored Meshes for Compliant Wearable and Implantable Devices
Additive Manufacturing of Biomechanically Tailored Meshes for Compliant Wearable and Implantable Devices
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用于合规可穿戴和植入设备的生物力学定制网格的增材制造
DOI：
10.1002/adfm.201901815
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发表时间：
2019
影响因子：
19
通讯作者：
Hogan, Neville
中科院分区：
文献类型：
--
作者：
Pattinson, Sebastian W.;Huber, Meghan E.;Kim, Sanha;Lee, Jongwoo;Grunsfeld, Sarah;Roberts, Ricardo;Dreifus, Gregory;Meier, Christoph;Liu, Lei;Hogan, Neville
骨科植入物和助听器等医疗器械的增材制造（AM）极具吸引力，因为AM具有匹配个体人体复杂形状和力学的潜力。外戴式和植入式组织支持器械，如踝关节或膝关节支架和疝修补补片，为AM提供了模拟组织样力学并改善患者结局和舒适度的新机会。在这里，它演示了如何在挤出增材制造过程中明确编程的工具路径可以使新的，灵活的网状材料具有数字定制的机械性能和几何形状。网片通过热塑性塑料的挤出制造，任选地具有连续纤维增强，使用连续的工具路径，该工具路径通过松弛的结合和顺应性长丝结合的调节来定制网片的单元格的弹性。它示出了如何拉伸网格力学可以被设计为匹配肌肉的非线性响应。脚踝支具与方向特定的反转刚度所产生的嵌入式网格进行了验证，并为3D网格设备的进一步概念原型。
Additive manufacturing (AM) of medical devices such as orthopedic implants and hearing aids is highly attractive because of the potential of AM to match the complex form and mechanics of individual human bodies. Externally worn and implantable tissue‐support devices, such as ankle or knee braces, and hernia repair mesh, offer a new opportunity for AM to mimic tissue‐like mechanics and improve both patient outcomes and comfort. Here, it is demonstrated how explicit programming of the toolpath in an extrusion AM process can enable new, flexible mesh materials having digitally tailored mechanical properties and geometry. Meshes are fabricated by extrusion of thermoplastics, optionally with continuous fiber reinforcement, using a continuous toolpath that tailors the elasticity of unit cells of the mesh via incorporation of slack and modulation of filament–filament bonding. It is shown how the tensile mesh mechanics can be engineered to match the nonlinear response of muscle. An ankle brace with directionally specific inversion stiffness arising from embedded mesh is validated, and further concepts for 3D mesh devices are prototyped.
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