Personalized Geometric Modeling of a Human Knee: Data, Algorithms, Outcomes

2021 ◽  
pp. 213-222
Author(s):  
Alexandra Yurova ◽  
Victoria Salamatova ◽  
Yuri Vassilevski ◽  
Lin Wang ◽  
Sergei Goreynov ◽  
...  
Keyword(s):  
Geometric Modeling ◽  
Human Knee

Modeling, Simulation and Optimization of a Human Knee Orthotic Device

2013 ◽  
Vol 371 ◽  
pp. 549-553 ◽  
Author(s):  
Marius Catana ◽  
Daniela Tarniţă ◽  
Dan Tarnita
Keyword(s):  
Knee Joint ◽  
Geometric Modeling ◽  
Geometric Model ◽  
Human Knee ◽  
Simulation And Optimization ◽  
Orthotic Device ◽  
Knee Oa ◽  
Human Knee Joint ◽  
Materials Used

In order to improve the quality of human walking, the present paper is analyzing a 3D virtual model for an orthotic device which is subjected to an optimization process based on dimensional, geometric and material criteria. For geometric modeling of the human knee joint were used the embedded applications: DesignModeler, SpaceClaim under AnsysWorkbench software package and for the orthotic device it was used ProEngineer application. The orthotic device is designed to rehabilitate people with knee problems, especially for the osteoarthritis affection. The geometric model of the joint shows a 50tilt invarus, the joint beeing affected by osteoarthritis in the medial compartment. Using Ansys simulation environment, the virtual assembly joint orthois has been subjected to a nonlinear analysis based on the contacts and on the materials used. The proposed orthotic device seeks to improve the quality of walking by minimizing the loads from the knee joint, also on cartilage and on the menisci. Finally there are beeing compared the results obtained for normal knee, OA knee and OA knee-orthosis assemblies.

Stresses and Displacements for Virtual Models of Healthy and Osteoarthritic Knee Joint

2014 ◽  
Vol 658 ◽  
pp. 526-531
Author(s):  
Daniela Tarniţă ◽  
Marius Catana ◽  
Dan Tarnita
Keyword(s):  
Knee Joint ◽  
Geometric Modeling ◽  
Three Dimensional ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Human Knee ◽  
Biomechanical Behavior ◽  
Human Knee Joint ◽  
Healthy Knee ◽  
Applied Forces

This paper presents advanced modeling and simulation methods, using the latest generation of CAD-CAE applications. For the geometric modeling of human knee joint embedded applications as DesignModeler, SpaceClaim under Ansys Workbench software package were used. The objective of this study is to present our contributions on the modeling, simulations and finite element analysis of the healthy and osteoarthritic human knee joint in order to quantify and investigate its biomechanical behavior. The main objective of this article is to present a complex three-dimensional model of the healthy knee joint and of the osteoarthritic joint which shows a 15otilt in varus, the joint being affected by osteoarthritis in both compartments, in order to predict stresses and displacements in their individual components. The applied forces were equal with 800 N and 1500 N. Finally the results obtained for normal knee and for OA knee joint are compared.

Virtual Simulation of Plastic Injection Technology for Medical Devices

2013 ◽  
Vol 371 ◽  
pp. 529-533
Author(s):  
Marius Catana ◽  
Daniela Tarniţă ◽  
Viorel Diorduc
Keyword(s):  
Geometric Modeling ◽  
Process Analysis ◽  
Human Knee ◽  
Orthotic Device ◽  
Injection Process ◽  
Geometric Mesh ◽  
Mesh Model ◽  
Model Study ◽  
Injection Technology ◽  
Plastic Injection

This paper aims to present the simulation of technological process of components made by plastic injection using a computer within a orthotic device for human knee. Also, the aim of the work is to improve the final product quality and operating properties in different types of design and minimize material requirements for different anthropometric data quality in optimal conditions. The orthotic device addresses to people with walking disabilities, and aims to rehabilitate and ameliorate the pain caused by osteoarthritis disease. For the geometric modeling of components in order to obtain virtual mathematical model study we used ProEngineer application, which allows a detailed design and a high accurate technical approach. The model was imported into the Moldex3D application, being integrated within a XYZ coordinate system.To simulate the injection process we used only the component from the upper part of orthotic device. This paper presents advanced modeling elements, geometric mesh model into an advanced form of nodes and elements, plastic injection process analysis settings. It highlights the tensions, deformations and displacements in these parts during the injection process.

Load-Bearing in the Ovine Medial Tibial Condyle: Effect of Meniscectomy

1993 ◽  
Vol 06 (02) ◽  
pp. 100-104 ◽  
Author(s):  
D. M. Pickles ◽  
C. R. Bellenger
Keyword(s):  
Knee Joint ◽  
Contact Area ◽  
Mammalian Species ◽  
Total Removal ◽  
Load Bearing ◽  
Human Knee ◽  
Biochemical Effects ◽  
Pressure Sensitive ◽  
Medial Meniscectomy ◽  
Tibial Condyle

SummaryTotal removal of a knee joint meniscus is followed by osteoarthritis in many mammalian species. Altered load-bearing has been observed in the human knee following meniscectomy but less is known about biochemical effects of meniscectomy in other species. Using pressure sensitive paper in sheep knee (stifle) joints it was found that, for comparable loads, the load-bearing area on the medial tibial condyle was significantly reduced following medial meniscectomy. Also, for loads of between 50 N and 500 N applied to the whole joint, the slope of the regression of contact area against load was much smaller. Following medial meniscectomy, the ability to increase contact area as load increased was markedly reduced.The load bearing area on the medial tibial condyle was reduced following meniscectomy.

Experimentally Applied Mechanical Load to the Human Knee Systematically Affects the Morphology of Articular Cartilage

2018 ◽  
Author(s):  
Grischa Bratke ◽  
Steffen Willwacher ◽  
David Maintz ◽  
Gert-Peter Brüggemann
Keyword(s):  
Articular Cartilage ◽  
Mechanical Load ◽  
Human Knee

Design of a Human Knee Reeducation Mechanism

2019 ◽  
Vol 11 (1) ◽  
pp. 42-53
Author(s):  
Allaoua Brahmia ◽  
Ridha Kelaiaia
Keyword(s):  
Lower Limb ◽  
Mechanical Design ◽  
Kinematic Chain ◽  
Lower Limbs ◽  
Kinematic Structure ◽  
Robotic Device ◽  
Human Knee ◽  
Kinematic Study ◽  
Rehabilitation Exercise ◽  
New Machine

Abstract To establish an exercise in open muscular chain rehabilitation (OMC), it is necessary to choose the type of kinematic chain of the mechanical / biomechanical system that constitutes the lower limbs in interaction with the robotic device. Indeed, it’s accepted in biomechanics that a rehabilitation exercise in OMC of the lower limb is performed with a fixed hip and a free foot. Based on these findings, a kinematic structure of a new machine, named Reeduc-Knee, is proposed, and a mechanical design is carried out. The contribution of this work is not limited to the mechanical design of the Reeduc-Knee system. Indeed, to define the minimum parameterizing defining the configuration of the device relative to an absolute reference, a geometric and kinematic study is presented.

Some aspects of the pedagogical model of constructive geometric modeling

2020 ◽  
Author(s):  
Denis Voloshinov ◽  
K. Solomonov ◽  
Lyudmila Mokretsova ◽  
Lyudmila Tishchuk
Keyword(s):  
Computer Graphics ◽  
Geometric Modeling ◽  
Educational Process ◽  
Educational Institutions ◽  
Software Systems ◽  
Teaching Methodology ◽  
Models Of Teaching ◽  
Software Product ◽  
The University

The application of constructive geometric modeling to pedagogical models of teaching graphic disciplines today is a promising direction for using computer technology in the educational process of educational institutions. The essence of the method of constructive geometric modeling is to represent any operation performed on geometric objects in the form of a transformation, as a result of which some constructive connection is established, and the transformation itself can be considered as a result of the action of an abstract cybernetic device. Constructive geometric modeling is a popular information tool for information processing in various applied areas, however, this tool cannot be appreciated without the presence of appropriate software systems and developed design techniques. Traditionally, constructive geometric modeling is used in the design of mechanical engineering, energy, aircraft and shipbuilding facilities, in architectural and design engineering. The need to study descriptive geometry at the university in recent years has something in common with the issues of mastering graphic packages of computer programs in the framework of the new discipline "Engineering and Computer Graphics". The well-known KOMPAS software product is considered the simplest and most attractive for training. It should be noted the important role of graphic packages in the teaching of geometric disciplines that require a figurative perception of the material by students. Against the background of a reduction in classroom hours, computer graphics packages are practically the only productive teaching methodology, successfully replacing traditional tools - chalk and blackboard.

Geometric Modeling Applications Interface Programs (GMAP). GMAP/PDDI system Component Product Specification (as Built). Volume 2. Schema Manager Listing

1990 ◽  
Author(s):  
R. Disa ◽  
C. Van Wie ◽  
K. Arnold ◽  
J. Altemueller ◽  
A. Whelan
Keyword(s):  
Geometric Modeling ◽  
System Component ◽  
Product Specification
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