ArticleMaterials (Basel, Switzerland)2021
Effect of Ankle Torque on the Ankle-Foot Orthosis Joint Design Sustainability.
Article in Materials (Basel, Switzerland), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- A novel prosthetic foot with a flexible rubber ankle for the Indonesian population: a finite element analysis.BMC musculoskeletal disorders · 2025Article
- Effects of powered ankle-foot orthoses mass distribution on lower limb muscle forces-a simulation study.Medical & biological engineering & computing · 2023Article
- Numerical and Experimental Mechanical Analysis of Additively Manufactured Ankle-Foot Orthoses.Materials (Basel, Switzerland) · 2022Article
Corrections and comments
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Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The ankle joint of a powered ankle-foot orthosis (PAFO) is a prominent component, as it must withstand the dynamic loading conditions during its service time, while delivering all the functional requirements such as reducing the metabolic effort during walking, minimizing the stress on the user's joint, and improving the gait stability of the impaired subjects. More often, the life of an AFO is limited by the performance of its joint; hence, a careful design consideration and material selection are required to increase the AFO's service life. In the present work, a compact AFO joint was designed based on a worm gear mechanism with steel and brass counterparts due to the fact of its large torque transfer capability in a single stage, enabling a compact joint. Further, it provided an added advantage of self-locking due to the large friction that prevents backdrive, which is beneficial for drop-foot recovery. The design was verified using nonlinear finite element analysis for maximum torque situations at the ankle joint during normal walking. The results indicate stress levels within its design performance; however, it is recommended to select high-grade structural steel for the ankle shaft as the highest stresses in AFO were located on it.
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Registered trials
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