G0301-2-6 Three Dimensional Elastic Deformations and stresses in Acetabular Cup of Artificial Hip Joint : Effect of Loaded Position

2009 ◽  
Vol 2009.1 (0) ◽  
pp. 31-32
Author(s):  
Tetsuya KOBAYASHI ◽  
Yoshihiro SUGANO ◽  
Yusuke KUDO
Keyword(s):  
Hip Joint ◽  
Three Dimensional ◽  
Joint Effect ◽  
Acetabular Cup ◽  
Elastic Deformations ◽  
Artificial Hip Joint ◽  
Artificial Hip

LOAD TRANSMISSION THROUGH ARTIFICIAL HIP JOINTS DUE TO STRESS WAVE LOADING

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1789-1794
Author(s):  
Y. TANABE ◽  
T. UCHIYAMA ◽  
H. YAMAOKA ◽  
H. OHASHI
Keyword(s):  
Hip Joint ◽  
Test Temperature ◽  
Impact Load ◽  
Force Transmission ◽  
Acetabular Cup ◽  
Load Transmission ◽  
Setting Angle ◽  
Artificial Hip Joint ◽  
Artificial Hip ◽  
The Impact

Since wear of the polyethylene (Ultra High Molecular Weight Polyethylene or UHMWPE) acetabular cup is considered to be the main cause of loosening of the artificial hip joint, the cross-linked UHMWPE with high durability to wear has been developed. This paper deals with impact load transmission through the complex of an artificial hip joint consisting of a UHMWPE acetabular cup (or liner), a metallic femoral head and stem. Impact compressive tests on the complex were performed using the split-Hopkinson pressure bar apparatus. To investigate the effects of material (conventional or cross-linked UHMWPE), size and setting angle of the liner, and test temperature on force transmission, the impact load transmission ratio (ILTR) was experimentally determined. The ILTR decreased with an increase of the setting angle independent of material and size of the liner, and test temperature. The ILTR values at 37°C were larger than those at 24 °C and 60°C. The ILTR also appeared to be affected by the type of material as well as size of the liner.

Efficient Machining of Artificial Hip Joint Components

2010 ◽  
Vol 97-101 ◽  
pp. 2269-2272 ◽  
Author(s):  
Alokesh Pramanik ◽  
Liang Chi Zhang ◽  
Yi Qing Chen
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Hip Joint ◽  
Cutting Tool ◽  
Three Dimensional ◽  
Machining Efficiency ◽  
Joint Prosthesis ◽  
The Finite Element Method ◽  
Artificial Hip Joint ◽  
Artificial Hip

This paper investigates the effect of tool and workpiece motions on the machining efficiency in the fabrication of hip joint prosthesis. The finite element method was used to characterize the three-dimensional motion of the system, using the uniformity or even distribution of a cutting tool tip trajectory as an efficiency indicator. It was found that a proper combination of the rotational speeds of a cutting tool and a workpiece can improve significantly the efficiency of the machining operation.

Three-Dimensional Lubrication Model of an Artificial Hip Joint With Gait Analysis

1999 ◽  
Author(s):  
Donna M. Meyer ◽  
John A. Tichy
Keyword(s):  
Service Life ◽  
Hip Joint ◽  
Revision Surgery ◽  
Wear Debris ◽  
Hip Prosthesis ◽  
Three Dimensional ◽  
Wear Particles ◽  
Artificial Hip Joint ◽  
Artificial Hip ◽  
Human Joints

Abstract The development of the hip prosthesis is a result of extensive collaboration between the medical and engineering fields. Although the technology to replace ailing human joints with artificial replicas is quite advanced, these remarkable advances require additional attention. In particular, extending the service life of a hip prosthesis is a primary consideration. An artificial hip joint may require revision surgery due to a number of contributions, one of which is extensive wear. Within the first few years following hip implantation, high amounts of wear particles form due to the contact of the articulating surfaces. The amounts of wear debris generated is a function of the material combinations of the rubbing surfaces of the joint, the amount of lubrication present in the joint during activity and the types and levels of activity.

Numerical Study of Salat Movements for Total Hip Replacement Patient

2014 ◽  
Vol 493 ◽  
pp. 426-431 ◽  
Author(s):  
Rifky Ismail ◽  
Eko Saputra ◽  
Mohammad Tauviqirrahman ◽  
A.B. Legowo ◽  
Iwan Budiwan Anwar ◽  
...  
Keyword(s):  
Total Hip Replacement ◽  
Hip Joint ◽  
Hip Replacement ◽  
Numerical Study ◽  
Three Dimensional ◽  
Joint Model ◽  
Von Mises Stress ◽  
Total Hip ◽  
Artificial Hip Joint ◽  
Artificial Hip

Salat as a daily Muslim activitiy in praying contains several movements which are not suggested by orthopaedic doctor to be conducted by patient with total hip replacement (THR). Sujud and sitting are two movements in Salat which is recommended to be done above the chair for THR patients. There are lacks of scientific discussions about the consequences of the normal salat movement for Muslim THR patients. This paper observes the effect of these movements to the artificial hip joint in THR patient body. A three-dimensional finite element simulation is used to investigate the resisting moment, the contact pressure and the von Mises stress. An artificial hip joint model proposed by previous researcher is used in the simulations. The results show that sujud induces the impingement and plastic deformation whereas sitting is relatively safe to be conducted by THR patients. Some suggestions are also discussed with respect to the design of new artificial hip joint model which allows THR patients to conduct Salat in a normal way. The reduction of inset at the liner, the new profile at circumferential edge inner liner and the increase in the femoral head diameter can be considered as a guideline for new design of the artificial hip joint for Muslim.

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