Geometry and mechanics of the human ankle complex and ankle prosthesis design

2001 ◽  
Vol 16 (8) ◽  
pp. 706-709 ◽  
Author(s):  
Alberto Leardini
Author(s):  
Dheeman Bhuyan ◽  
Kaushik Kumar

Nature has, over a large span of geological time, engineered near perfect solutions to most problems humans face today. Motion of the limbs is one such area, and the cutting edge in the development of effective prostheses is biomimetics. Limb prostheses have been used by mankind for the better part of known history, and most of the technology currently available in prosthetics is not exclusively new. However, modern prosthetics either are uncomfortable—and the lack of flexion affects the gait of the patient—or too expensive for a large segment of the populace. This chapter seeks to study the mimicry of physiological systems through the design for an ankle prosthesis that includes a passive damper and mimics the shape and behavior of the natural ankle joint.


2017 ◽  
Vol 44 ◽  
pp. 75-82 ◽  
Author(s):  
Prashant K. Jamwal ◽  
Shahid Hussain ◽  
Yun Ho Tsoi ◽  
Mergen H. Ghayesh ◽  
Sheng Quan Xie

Author(s):  
R. Franci ◽  
V. Parenti-Castelli

This paper presents a new equivalent spatial mechanism for the passive motion simulation at the human ankle complex joint. The mechanism is based on the geometry of the main anatomical structures of the ankle complex, such as the shape of the talus and tibio/fibula bones at their interface, and the TiCal and CaFil ligament lengths. In particular, three sphere-to-sphere contact points at the interface have been identified and isometric fibers of both TiCal and CaFil ligaments have been considered to devise the equivalent mechanism. The proposed mechanism is a fully-parallel mechanism of type 5-5 with one degree of freedom. A procedure for the optimal synthesis of the mechanism is given. Simulation results compared with experimental data show the efficiency of the proposed mechanism to replicate the ankle passive motion, and also to reflect at the same time the main anatomical structures of the ankle joint. The new mechanism is believed to be a useful tool for both pre-operation planning and prosthesis design.


Author(s):  
Juan A. García ◽  
Giovani W. Muñoz ◽  
Christian M. Cobos ◽  
Santiago Ferrandiz

1999 ◽  
Vol 32 (2) ◽  
pp. 111-118 ◽  
Author(s):  
A. Leardini ◽  
J.J. O’Connor ◽  
F. Catani ◽  
S. Giannini

1994 ◽  
Vol 27 (6) ◽  
pp. 807 ◽  
Author(s):  
Stephan J. LaPointe ◽  
Sorin Siegler ◽  
Arnold T. Berman ◽  
Chaim Arlosoroff
Keyword(s):  

2012 ◽  
Vol 36 (3) ◽  
pp. 370-375 ◽  
Author(s):  
Sarah A Curran ◽  
David K Lyle

Participating in sport at all levels is gaining a dedicated following and this is also apparent in individuals with an amputation. Currently, there is a wide variety of ankle prostheses available which attempt to provide function, control, and comfort, as well as good aesthetic appeal. Participation in sport, however, increases the demands placed upon ankle prostheses. This can compromise function and performance, and constrain the opportunities of participation in various outdoor and water sports. In acknowledging this limitation and the need to develop more versatile ankle prostheses, this article introduces the evolution of a prototype ankle prosthesis referred to as “ Adaptive Sports Ankle.” The ankle prosthesis, which is compatible with any foot pyramid adapter, offers the same range of motion as the normal human ankle joint and is made up of components that are chemical and corrosion resistant. These design features that are specifically created to accommodate below-the-knee amputees provide an ideal prosthesis for those wishing to lead an active lifestyle and participate in aquatic (i.e. swimming, surfing, and scuba diving), snowboarding, and equestrian activities. Although it is acknowledged that there is a need to establish research on the Adaptive Sports Ankle, its introduction to the market will enhance and expand opportunities of those individuals with a lower limb amputation to lead an active and healthy lifestyle. Clinical relevance The introduction of the Adaptive Sports Ankle Prosthesis provides versatility in terms of motion of the device and robust material. Although in its infancy, clinicians should be aware of the potential of this product for individuals who have had a below-the-knee amputation and express a desire to participate in water sports and other outdoor activities.


Author(s):  
Dheeman Bhuyan ◽  
Kaushik Kumar

Nature has, over a large span of geological time, engineered near perfect solutions to most problems humans face today. Motion of the limbs is one such area, and the cutting edge in the development of effective prostheses is biomimetics. Limb prostheses have been used by mankind for the better part of known history, and most of the technology currently available in prosthetics is not exclusively new. However, modern prosthetics either are uncomfortable—and the lack of flexion affects the gait of the patient—or too expensive for a large segment of the populace. This chapter seeks to study the mimicry of physiological systems through the design for an ankle prosthesis that includes a passive damper and mimics the shape and behavior of the natural ankle joint.


2021 ◽  
Vol 1190 (1) ◽  
pp. 012034
Author(s):  
Copilusi Cristian ◽  
Geonea Ionut ◽  
Margine Alexandru ◽  
Constantin Andra

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Francesco Aggogeri ◽  
Nicola Pellegrini ◽  
Riccardo Adamini

This paper is aimed at presenting an innovative ankle rehabilitation device based on a parallel mechanism. A functional analysis and design are described to obtain a device able to guarantee ankle movement while patient’s body remains stationary. Human ankle is a challenging context where a series of joints are highly integrated. The proposed rehabilitation device permits a patient with walking defects to improve his or her gait. The research focuses on plantar-flexion-dorsiflexion movement. The robust design starts from an accurate modelling of ankle movements during walking, assessing motion data from healthy individuals and patients. The kinematics analysis and functional evaluations lead the study and development of the articulated system. In particular, results of simulations support the effectiveness of the current design. A 3D prototype is presented highlighting that the ankle motion is successfully demonstrated.


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