Biomechanical Design of the Total Ankle Prosthesis

1983 ◽  
Vol 12 (2) ◽  
pp. 69-80 ◽  
Author(s):  
P M Calderale ◽  
A Garro ◽  
R Barbiero ◽  
G Fasolio ◽  
F Pipino
Keyword(s):  
Ankle Joint ◽  
Human Body ◽  
Design Criteria ◽  
Optimized Design ◽  
Load Bearing ◽  
Ankle Prosthesis ◽  
The Disabled

The load bearing joints of the human body and particularly the ankle are often seriously damaged because of different pathological events. During the last 10 years a lot of total ankle prostheses have been studied and implanted, in consequence of the inadequate results obtained by arthrodesis (i.e. the fusion of the joint). The aim of this paper is to analyze mechanical features (functional, kinematic, and strength) of the ankle joint in order to provide optimized design criteria of an arthroprosthesis substituting the disabled joint.

Design of a Prosthetic Ankle Complex

2021 ◽  
pp. 381-399
Author(s):  
Dheeman Bhuyan ◽  
Kaushik Kumar
Keyword(s):  
Ankle Joint ◽  
Cutting Edge ◽  
Geological Time ◽  
Ankle Prosthesis ◽  
Large Span ◽  
Large Segment ◽  
Passive Damper ◽  
Ankle Complex ◽  
And Behavior ◽  
Physiological Systems

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.

Statistical ankle-shape and pressure analysis for design of elastic tubular bandage

2020 ◽  
pp. 095441192096528
Author(s):  
Chunqiang Zhang ◽  
Xiaomin Ji ◽  
Yanmin Xue ◽  
Gang Hu
Keyword(s):  
Standard Model ◽  
Ankle Joint ◽  
Human Body ◽  
Elastic Tube ◽  
Compression Garments ◽  
Minimum Pressure ◽  
Convex Curves ◽  
The Standard Model ◽  
Body Discomfort ◽  
Pressure Analysis

Ankles can benefit from the elastic tube bandage (ETB) by providing the ankle joint with compression, but partial high- or low-pressure leads to body discomfort. The aim of this paper is to propose a method for analyzing the ankle shape with the fabric compression which is basis on the comfortable pressure on human body. First, a standard model of ankle is established from the scanned data of 306 samples, and the mapping of the fabric shape curves on ankle were constructed by the U-direction convex curves of the model. The positions or areas of maximum and minimum pressure are then marked by extracting the curvatures of the fabric shape curves. According to the Laplace’s Law, the sizes of ETBs can be calculated given that the value of comfortable pressure on human body is the maximum one. The data of calculation is approximate to the relevant previous studies which has the same parameters of ETBs. Nine groups of the ankle shapes from the database are discussed, each group has a proportional coefficient to the standard model, and the result shows that six sizes of ETBs with comfort pressure match for the nine groups. These can be applied to the comfort design, and the method proposed can boost size customization of ETBs, as well as will inspire the research on other elastic compression garments.

scholarly journals Niepełnosprawność w historii sztuki oraz anty-ableizm sztuki współczesnej

2021 ◽  
Author(s):  
Joanna Stawowy
Keyword(s):  
Twentieth Century ◽  
Social Movements ◽  
Contemporary Art ◽  
Human Body ◽  
Social Involvement ◽  
Disabled People ◽  
The Social ◽  
The Disabled ◽  
Long Time ◽  
The Subject

The subject of illness and disability has been explored by artists for a long time. Depending on the era, it was presented in different ways. Twentieth-century social movements, interested in emancipating otherness, shed new light on the perception of the human body and its causative capabilities. Currently, the artist is more a commentator of reality than its passive observer and disability is one of the most important subjects of art. The exclusion, which used to involve disabled people, seems to be passing nowadays, however the problem of ableism still exists. Contemporary artists refer to it in their works trying to face harmful stereotypes. The purpose of this article is to look at disability through the eyes of artists, to find its representations in works of art and to trace how the perception of the disabled body has changed, based on the aesthetics and canon of a given age – from the perfect body of antique to the social involvement of contemporary art.

Multijoint passive elastic spine exoskeleton for stoop lifting assistance

2021 ◽  
Vol 18 (6) ◽  
pp. 172988142110620
Author(s):  
Jiyuan Song ◽  
Aibin Zhu ◽  
Yao Tu ◽  
Jiajun Zou
Keyword(s):  
Human Body ◽  
Musculoskeletal Diseases ◽  
Biomechanical Model ◽  
Human Robot Interaction ◽  
The Body ◽  
Robot Interaction ◽  
Load Bearing ◽  
High Stiffness ◽  
Wearable Robots ◽  
Natural Movement

In the task of carrying heavy objects, it is easy to cause back injuries and other musculoskeletal diseases. Although wearable robots are designed to reduce this danger, most existing exoskeletons use high-stiffness mechanisms, which are beneficial to load-bearing conduction, but this restricts the natural movement of the human body, thereby causing ergonomic risks. This article proposes a back exoskeleton composed of multiple elastic spherical hinges inspired by the biological spine. This spine exoskeleton can assist in the process of bending the body and ensure flexibility. We deduced the kinematics model of this mechanism and established an analytical biomechanical model of human–robot interaction. The mechanism of joint assistance of the spine exoskeleton was discussed, and experiments were conducted to verify the flexibility of the spine exoskeleton and the effectiveness of the assistance during bending.

Optimized design of primary load-bearing structure for earth observation micro-satellite

2015 ◽  
Vol 23 (11) ◽  
pp. 3183-3191 ◽  
Author(s):  
魏磊 WEI Lei ◽  
金光 JIN Guang ◽  
谢晓光 XIE Xiao-guang ◽  
张雷 ZHANG Lei ◽  
杨林 YANG Lin
Keyword(s):  
Earth Observation ◽  
Optimized Design ◽  
Load Bearing ◽  
Bearing Structure ◽  
Primary Load

Load Bearing Capacity in Total Ankle Joint Replacement

1986 ◽  
Vol 15 (3) ◽  
pp. 149-151 ◽  
Author(s):  
N C Jensen ◽  
I Hvid
Keyword(s):  
Bearing Capacity ◽  
Ankle Joint ◽  
Joint Replacement ◽  
Compressive Load ◽  
Mean Value ◽  
Simple Design ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
The Mean ◽  
Yield Force

The influence of some simple design variations on the compressive load bearing capacity of tibial and talar prosthetic components in total ankle joint replacement were investigated in an attempt to suggest improvements to current prosthetic designs. Eighteen paired ankle joint preparations were fitted with three types of tibial components and two types of talar components. The tibial component with an intramedullary peg tolerated significantly higher loads before mechanical failure than the two other designs that were equal in load bearing capacity. The mean value of ultimate force was 40 per cent higher and the mean value of yield force was 15 per cent higher. However, for the coefficient of stiffness there was a significant fall of 18 per cent in the mean value. The talar components were equal in load bearing capacity and stiffness.

Design of the Rehabilitative Apparatus for Ankle Joint Based on Parallel Mechanism and EMC2

2013 ◽  
Vol 663 ◽  
pp. 515-521
Author(s):  
Xiao Su ◽  
Zhao Peng Liu ◽  
Bin Cheng Li
Keyword(s):  
Control System ◽  
Training Program ◽  
Ankle Joint ◽  
Human Body ◽  
Parallel Mechanism ◽  
Motor Rehabilitation ◽  
Reciprocating Motion ◽  
Mechanical Device ◽  
Training Requirements ◽  
And Control

This paper adopts parallel mechanism to replace the traditional unarmed or simple mechanical device to offer better rehabilitative training on human body ankle joint, which can medically meet the demands of proceeding various training of motor rehabilitation on the ankle joint with an excellent application prospect. The design of the control system adopts t ier to operate and control. It can meet the various training requirements of users such as slow, continuous and reciprocating motion, and it can also design personalized training program based on the users’ own condition. He open-EMC2 which makes it easy.

scholarly journals Physics in architecture projects, a perfect match on Alamillo’s bridge by Santiago Calatrava

2021 ◽  
Vol 2102 (1) ◽  
pp. 012003
Author(s):  
M C Acuña-Prada ◽  
L K Coronel-Ruiz ◽  
R Prada-Nuñez
Keyword(s):  
Reinforced Concrete ◽  
Human Body ◽  
Perfect Match ◽  
Historical Context ◽  
Descriptive Study ◽  
Design Criteria ◽  
Methodological Framework ◽  
Aesthetic Design ◽  
Quantitative Descriptive ◽  
Contemporary Architecture

Abstract The Alamillo’s bridge by Santiago Calatrava was studied, who develops projects and structures with morphological, sculptural, and conceptual aspects associated with physics and contemporary architecture, through experimentation with forms of nature, the movement of the human body and, materials such as steel and reinforced concrete. The methodological framework corresponded to a documentary study that determined the importance of the bridge from its historical context as part of the infrastructure of the 1992 Universal Exposition in Seville, as well as the analysis of the physical concepts used in its design and construction; and, a quantitative-descriptive study applied to the seventh semester students of the Architecture program of the Universidad Francisco de Paula Santander, Colombia, which determined their level of recognition of the physical concepts of this project. As a finding, it is highlighted that this bridge applied physical concepts such as: aerodynamics, torsion, compression, tension, traction, and gravitation, in compliance with its formal-aesthetic design criteria, and those students recognize the physical concepts, design and technical characteristics-formal, typical of the project. Likewise, it was determined that this urban landmark represents a comprehensive solution that solves the structure and form through solutions associated with the field of engineering, architecture, and physics.

Effects of wearing raised-heel insoles for 60 days on physical functions: focusing on adult males in their twenties

2021 ◽  
Keyword(s):  
Ankle Joint ◽  
Human Body ◽  
Repeated Measures ◽  
Muscle Tone ◽  
Dynamic Stiffness ◽  
Medial Gastrocnemius ◽  
Static Balance ◽  
Plantar Flexors ◽  
Significant Difference ◽  
Long Time

Background and Objectives: As men frequently use raised-heel insoles (RHIs) for a cosmetic purpose rather than a functional purpose in daily life, they are exposed to the risk of musculoskeletal disorders. The objective of this study was to evaluate the effects of wearing RHIs for 60 days on overall body functions and mechanical adaption. Materials and Methods: This study measured pelvic range of motion (ROM), balance, two-point discrimination (2PD), ankle joint ROM, lower back pain (LBP), muscle tone, stiffness, and decrement in male subjects in their 20s. Subjects wore RHIs (5 cm) for 8 h per day for 8 weeks (60 days). Measurements were conducted at 0, 30, and 60 days after the experiment began. Repeated-measures one-way analysis of variance (ANOVA) was performed to examine the effects of wearing duration (0, 30, and 60 days) on variables followed by a post-hoc test (Dunnett T3) when there was a significant difference. Results: Pelvic ROM decreased (p < 0.01), whereas static balance and 2PD increased (p < 0.001, p < 0.01, respectively) when the duration of wearing RHIs increased. The pelvic ROM on day 0 was significantly different from that on day 60 (p = 0.01). Static balance showed significant differences between day 0 and day 60 or day 30 (p = 0.000, p = 0.000, respectively). Dynamic balance, ankle joint ROM, and LBP did not differ significantly. The muscle tone of the plantar flexors (medial gastrocnemius) increased (p < 0.05), whereas decrement decreased (p < 0.05). Conclusions: It was found that wearing RHIs for a long time would adversely affect the human body. Wearing RHIs for a long time decreased pelvic ROM, whereas static balance and 2PD increased. It might have affected the overall body functions by increasing the muscle tone of the plantar flexors and worsening dynamic stiffness at the same time. The clinical significance lies in the fact that wearing RHIs for long durations would adversely affect the human body.

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