A 3D model analysis for developing multifunctional knee prosthesis

2007 ◽  
pp. 3177-3181 ◽  
Author(s):  
T. Katsuhara ◽  
J. Sakaguchi ◽  
S. Hirokawa
Keyword(s):  
3D Model ◽  
Knee Prosthesis ◽  
Model Analysis

Building an accurate 3D model of a circular feature for robot vision

2012 ◽  
Vol 20 (2) ◽  
Author(s):  
L. Li
Keyword(s):  
Efficient Method ◽  
Error Compensation ◽  
3D Model ◽  
Robot Vision ◽  
Model Analysis ◽  
Perspective Projection ◽  
Ellipse Fitting ◽  
Projection Scheme ◽  
Fitting Method ◽  
Data Points

AbstractIn this paper, an accurate 3D model analysis of a circular feature is built with error compensation for robot vision. We propose an efficient method of fitting ellipses to data points by minimizing the algebraic distance subject to the constraint that a conic should be an ellipse and solving the ellipse parameters through a direct ellipse fitting method by analysing the 3D geometrical representation in a perspective projection scheme, the 3D position of a circular feature with known radius can be obtained. A set of identical circles, machined on a calibration board whose centres were known, was calibrated with a camera and did the model analysis that our method developed. Experimental results show that our method is more accurate than other methods.

Slope Stability Comparatively Analyzed with 2D and 3D FEM

2012 ◽  
Vol 220-223 ◽  
pp. 2908-2911
Author(s):  
Jie Qun Liu ◽  
Jin Long Liu
Keyword(s):  
Slope Stability ◽  
Safety Factor ◽  
3D Model ◽  
Model Analysis ◽  
Stability Factor ◽  
Surface Load ◽  
3D Fem ◽  
The Stability ◽  
2D And 3D ◽  
2D Model

A typical slope has been comparatively analyzed with 2D and 3D FEM, it is showed that the length of surface load at top surface of slope shorted, the stability factor of slope of 3D model increased, which is far more than that of 2D model. In a certain degree, the safety factor got by 3D model is bigger than that of 2D model, so the safety factor of slope is underestimated by 2D model analysis sometimes.

530 A 3D model analysis for developing a prosthesis capable of deep knee flexion

2006 ◽  
Vol 2006.5 (0) ◽  
pp. 115-116
Author(s):  
Tadasuke KATSUHARA ◽  
Junpei SAKAGUCHI ◽  
Shunji HIROKAWA ◽  
Ayaka OHOTSUKI
Keyword(s):  
Knee Flexion ◽  
3D Model ◽  
Model Analysis

scholarly journals A 3D model analysis of patellofemoral joint: effect of anterior translation and internal rotation of tibia

2017 ◽  
Vol 12 (4) ◽  
pp. 17-00247-17-00247 ◽  
Author(s):  
Michihiko FUKUNAGA ◽  
Kentaro MORIMOTO ◽  
Tomoko KAJIWARA ◽  
Kuniyuki ITO ◽  
Ryuji NAGAMINE
Keyword(s):  
Internal Rotation ◽  
Patellofemoral Joint ◽  
3D Model ◽  
Joint Effect ◽  
Model Analysis ◽  
Anterior Translation

The Construction of Three-Dimensional Finite Element Model of TKA Knee

2013 ◽  
Vol 681 ◽  
pp. 319-323
Author(s):  
Bin Jiang ◽  
Yue Fu Dong ◽  
Yang Hu ◽  
Qing Rong Xu ◽  
Guang Hong Hu
Keyword(s):  
3D Model ◽  
Knee Prosthesis ◽  
Three Dimensional ◽  
Image Data ◽  
Element Model ◽  
Collateral Ligaments ◽  
Total Knee Prosthesis ◽  
3D Fem ◽  
Total Knee ◽  
Mri Image

The goal of this study is to construct a three-dimensional (3D) finite element model (FEM) of total knee arthroplasty (TKA) knee including bones, collateral ligaments and total knee prosthesis. Computed tomography (CT) and magnetic resonance imaging (MRI) image data of normal knee joint are imported into MIMICS software. The 3D models of bones and collateral ligaments are respectively reconstructed from CT and MRI image data. Then the reconstructed models are registered and fused together based on external landmarks. The virtual osteotomy and total knee prosthesis implantation are performed to establish the 3D model of TKA knee. Ultimately, A elaborate 3D FEM of TKA knee including anatomical structures and total knee prosthesis is obtained by meshing the 3D model of TKA knee and setting material properties, loading and boundary conditions. The obtained von Mises stress on the polyethlene insert confirms to the clincial mechanical distribution characteristics after TKA. The 3D FEM of TKA knee retains the integrity and accuracy in the anatomical features and provides a foundation for accurate research on the TKA knee biomechanical behaviors.

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