Górski Filip, Wichniarek Radosław, Kuczko Wiesław, Żukowska Magdalena
Faculty of Mechanical Engineering, Poznan University of Technology, Piotrowo 3 STR, 61-138 Poznan, Poland.
Materials (Basel). 2021 Sep 12;14(18):5240. doi: 10.3390/ma14185240.
This paper presents the results of experiments conducted on a batch of additively manufactured customized prosthetic sockets for upper limbs, made of thermoplastics and designed automatically on the basis of a 3D-scanned limb of a 3-year-old patient. The aim of this work was to compare sockets made of two different materials-rigid PLA and elastic TPE. Two distinct socket designs with various mounting systems were prepared. To find a reliable set of parameters for cheap and stable manufacturing of usable prostheses using 3D printers, realizing the fused deposition modeling (FDM) process, sets of sockets were manufactured with various process parameters. This paper presents the methodology of the design, the plan of the experiments and the obtained results in terms of process stability, fit and assessment by patient, as well as strength of the obtained sockets and their measured surface roughness. The results are promising, as most of the obtained products fulfil the strength criteria, although not all of them meet the fitting and use comfort criteria. As a result, recommendations of materials and process parameters were determined. These parameters were included in a prototype of the automated design and production system developed by the authors, and prostheses for several other patients were manufactured.
本文介绍了对一批增材制造的定制上肢假肢接受腔进行实验的结果。这些接受腔由热塑性塑料制成，基于一名3岁患者的3D扫描肢体自动设计。这项工作的目的是比较由两种不同材料——刚性聚乳酸（PLA）和弹性热塑性弹性体（TPE）制成的接受腔。制备了两种具有不同安装系统的独特接受腔设计。为了找到使用3D打印机实现熔丝沉积建模（FDM）工艺来廉价且稳定地制造可用假肢的可靠参数集，用各种工艺参数制造了多组接受腔。本文介绍了设计方法、实验计划以及在工艺稳定性、适配性、患者评估方面获得的结果，以及所制得接受腔的强度及其测量的表面粗糙度。结果很有前景，因为大多数所制得的产品符合强度标准，尽管并非所有产品都满足适配性和使用舒适度标准。结果确定了材料和工艺参数的建议。这些参数被纳入作者开发的自动化设计和生产系统的原型中，并为其他几名患者制造了假肢。
