Technical Medicine, University of Twente, Enschede, The Netherlands.
3D Lab, Radboud University Medical Center, Nijmegen, The Netherlands.
Proc Inst Mech Eng H. 2022 Mar;236(3):367-375. doi: 10.1177/09544119211060092. Epub 2021 Dec 1.
Measurement and production of traditional prosthetic sockets are time-consuming, labor-intensive, and highly dependent on the personnel involved. An alternative way to make prostheses is using computer-aided design (CAD) and computer-aided manufacturing (CAM). Fused Filament Fabrication (FFF) may be an alternative to make low-cost prosthetic sockets. This study investigates the tensile properties of potential printing materials suitable for FFF according to ISO527 (Standard Test Method for Tensile Properties of Plastics). To ensure that FFF-printed sockets are safe for patient usage, the structural integrity of the 3D-printed prosthesis will be investigated according to ISO10328 (International Standard Structural Testing of Lower Limb Prostheses). Tough PLA was the most suitable print material according to ISO 527 testing. The Tough PLA printed socket completed 2.27 million cycles and a static test target value of 4025 N. Future research remains necessary to continue testing new potential materials, improve print settings, and improve the socket design for the production of FFF-printed transtibial prosthetic sockets. FFF using Tough PLA can be used to create transtibial prostheses that almost comply with the International Standard for Structural Testing of Lower Limb Prostheses.
传统义肢接受腔的测量和制作既费时又费力，且高度依赖相关人员。使用计算机辅助设计 (CAD) 和计算机辅助制造 (CAM) 来制作义肢是一种替代方法。熔丝制造 (FFF) 可能是制作低成本义肢接受腔的另一种方法。本研究根据 ISO527（塑料拉伸性能的标准测试方法）调查了适合 FFF 的潜在打印材料的拉伸性能。为了确保 FFF 打印的接受腔可安全用于患者，将根据 ISO10328（下肢假肢结构测试的国际标准）调查 3D 打印义肢的结构完整性。根据 ISO 527 测试，坚韧 PLA 是最合适的打印材料。坚韧 PLA 打印的接受腔完成了 227 万次循环和 4025 N 的静态测试目标值。未来仍需要继续测试新的潜在材料、改进打印设置以及改进接受腔设计，以生产 FFF 打印的小腿假肢接受腔。使用坚韧 PLA 的 FFF 可用于制造几乎符合下肢假肢结构测试国际标准的小腿假肢。
