Ankle-foot orthoses (AFO) were well-used for stroke patients. Our study developed a new 3D printed AFO with the function of Energy Storage. It would be expected to improve the gait of the stroke patients. This study made a 3D printed joint part fixed between the foot plate and shank structure of AFO. The joint part was made of Nylon and inserted a steel plate to increase the strength against the inversion motion of foot. The potential energy from the dorsiflexion of ankle could be saved in the joint part and released in the pre-swing phase of the gait cycle to help walking. Due to the local health insurance policy patients can replace a new AFO every three months. The life of 3D printed AFO which was used in the condition of 2000 steps one day should last at least 3 months. Therefore this study tested the life of 3D printed AFO using the material test machine. The reciprocating motion of 3D printed AFO was limited in the range of 3 degree of plantarflexion and 10 degree of dorsiflexion. The results showed the shank structure broke in the clamping site of the jig after 144000 times of bending. The broken part showed the separating direction was not in the depositing direction of 3D printing path. It means the printing pattern of every layer is also a key issue for the strength of 3D printed object. In the future, this study will check the strength of 3D printed samples with different printing patterns and redesign the shank structure for the better life.
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4 December 2018
ICNPAA 2018 WORLD CONGRESS: 12th International Conference on Mathematical Problems in Engineering, Aerospace and Sciences
3–6 July 2018
Yerevan, Armenia
Research Article|
December 04 2018
Mechanical problem in 3D printed ankle-foot orthoses with function of energy storage
Chien-Hsien Yeh;
Chien-Hsien Yeh
a)
1
Medical Device Innovation Center, National Cheng Kung University
, Taiwan, China
a)Corresponding author: [email protected]
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Yi-Chun Tsai;
Yi-Chun Tsai
b)
2
Department of Biomedical Engineering, National Cheng Kung University
, Taiwan, China
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Fong-Chin Su;
Fong-Chin Su
c)
2
Department of Biomedical Engineering, National Cheng Kung University
, Taiwan, China
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Li-Chieh Kuo;
Li-Chieh Kuo
d)
3
Department of Occupational Therapy, National Cheng Kung University
, Taiwan, China
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Kai Chang;
Kai Chang
e)
3
Department of Occupational Therapy, National Cheng Kung University
, Taiwan, China
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Ping-Han Chuang
Ping-Han Chuang
f)
1
Medical Device Innovation Center, National Cheng Kung University
, Taiwan, China
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a)Corresponding author: [email protected]
AIP Conf. Proc. 2046, 020019 (2018)
Citation
Chien-Hsien Yeh, Yi-Chun Tsai, Fong-Chin Su, Li-Chieh Kuo, Kai Chang, Ping-Han Chuang; Mechanical problem in 3D printed ankle-foot orthoses with function of energy storage. AIP Conf. Proc. 4 December 2018; 2046 (1): 020019. https://doi.org/10.1063/1.5081539
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