Comparative Analysis of Impact Strength among Various Polymeric Materials for Orthotic Production

Habiba, Rachel; Amaro, Ana; Trindade, Daniela; Moura, Carla; Silva, Rui; Antão, André; Martins, Rui F.; Malça, Cândida; Branco, Ricardo

http://hdl.handle.net/10362/170252

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Orthotic devices play an important role in medical treatment, addressing various pathologies and promoting patient recovery. Customization of orthoses to fit individual patient morphologies and needs is essential for optimal functionality and patient comfort. The advent of additive manufacturing has revolutionized the biomedical field, offering advantages such as cost reduction, increased personalization, and enhanced dimensional adaptability for orthotics manufacturing. This research focuses on the impact strength of nine polymeric materials printed by additive manufacturing, including an evaluation of the materials’ performance under varying conditions comprising different printing directions (vertical and horizontal) and exposure to artificial sweat for different durations (0 days, 24 days, and 189 days). The results showed that Nylon 12 is good for short-term (24 days) immersion, with absorbed energies of 78 J and 64 J for the vertical and horizontal directions, whereas Polycarbonate (PC) is good for long-term immersion (189 days), with absorbed energies of 66 J and 78 J for the vertical and horizontal directions. Overall, the findings contribute to a better understanding of the suitability of these materials for biomedical applications, considering both short-term and long-term exposure to physiological and environmental conditions.

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The authors acknowledge Fundação para a Ciência e a Tecnologia (FCT, I.P.) for its financial support through the CEMMPRE projects UIDB/00285/2020 and LA/P/0112/2020, CDRSP projects UIDB/04044/2020 and UIDP/04044/2020, and UNIDEMI projects UIDB/00667/2020 and UIDP/00667/2020. Publisher Copyright: © 2024 by the authors.