Modular Lower Limb 3D-Printed Orthoprosthesis for Toddlers With Fibular Hemimelia

Anders, Lilli; Agulheiro, Paula; Da Silva, Hugo Plácido; Quaresma, Cláudia

http://hdl.handle.net/10362/188656

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Autores

Anders, Lilli

Agulheiro, Paula

Da Silva, Hugo Plácido

Quaresma, Cláudia

Resumo(s)

Toddlers with congenital limb deficiencies, such as fibular hemimelia, face major barriers to independent mobility during a critical window of motor development. Despite the need for early intervention, existing orthoprosthetic solutions are often inaccessible and poorly suited to the anatomical and functional needs of children aged 12–36 months. This study presents a novel, user-centered approach to a modular pediatric lower limb orthoprosthesis dubbed +Limb developed in close collaboration with caregivers, physicians, and therapists. Using additive manufacturing, successive prototypes were rapidly produced and tested in a clinical setting. The final device met key requirements for modularity, light weight, postural support, and adjustability. Functional evaluations demonstrated significant improvements, including correction of a 4.5 cm leg length discrepancy, reduction of pelvic tilt from 15° to 0°, and initiation of unassisted gait with controlled knee flexion up to 45°. To study how the body and muscles responded, different sensors were used, including pressure sensors (FSRs), muscle activity sensors (EMG), and a pressure plate for foot contact analysis. This case study demonstrates the feasibility of a low-cost, customizable orthoprosthesis for toddlers with fibular hemimelia and emphasizes the advantages of combining additive manufacturing and sensor-based feedback to support early-stage rehabilitation in pediatric populations.

Descrição

Funding Information: This work was partially supported by Fundação para a Ciência e Tecnologia (FCT)/Ministério da Educação, Ciência e Inovação (MECI) through national funds and when applicable co-funded by European Union (EU) funds through projects UID/50008 (Instituto de Telecomunicações), UI/BD/151321/2021 (LIBPhys-UNL), and LA/P/0117/2020 (REAL). Publisher Copyright: © 2013 IEEE.

Palavras-chave

Additive Manufacturing fibular hemimelia gait analysis pediatric orthoprosthesis user-centered design General Computer Science General Materials Science General Engineering