Ankle prosthesis design for transtibial amputation

Juan A. García, Giovani W. Muñoz, Christian M. Cobos, Santiago Ferrandiz

Research output: Contribution to journalConference articlepeer-review


People who suffer an amputation at the transtibial level choose to wear an ankle prosthesis to make their walk like a person without disabilities. In the present investigation, an ankle prosthesis design and simulation are made, which involves a restricted patella mechanism and a linear actuator capable of granting two degrees of freedom. A ball joint is designed where twelve springs that support the weight of a person are located, six springs comply with the eversion movement and the rest comply with the inversion movement, likewise, the actuator performs the dorsiflexion and plantar-flexion movements. The simulations were made in Inventor software. The results obtained on the ‘Y’ axis indicate a patella displacement in the inversion and eversion movement of 13.65 mm and 11.89 mm, respectively. These values are obtained when a tension of 1876.1 N is applied to the twelve springs. With these data obtained, stability and support for a person weighing 70 kg can be guaranteed, in addition, the established movement angles are com-plied. The prosthesis was built using additive and subtractive manufacturing.

Original languageEnglish
Pages (from-to)188-193
Number of pages6
JournalMaterials Today: Proceedings
StatePublished - 2022
Event1st International Virtual Conference on Mechanical Engineering Trends, MET 2021 - Virtual, Online, Ecuador
Duration: 24 Mar 202126 Mar 2021

Bibliographical note

Publisher Copyright:
© 2022 Elsevier Ltd. All rights reserved.


  • Ankle
  • Ball joint
  • Design
  • Simulation
  • Springs
  • Transtibial


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