Stability Studies of Acetabular Cup in Artificial Hip Joint Models

2017 ◽  
Vol 05 (01) ◽  
Author(s):  
J Płominski ◽  
Z Watral
Keyword(s):  
Hip Joint ◽  
Stability Studies ◽  
Joint Models ◽  
Acetabular Cup ◽  
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.

Preliminary Study on the Biocompatibility of Stainless Steel 316L and UHMWPE Material

2015 ◽  
Vol 1123 ◽  
pp. 160-163 ◽  
Author(s):  
Iwan Budiwan Anwar ◽  
Eko Saputra ◽  
J. Jamari ◽  
Emile van der Heide
Keyword(s):  
Stainless Steel ◽  
Hip Joint ◽  
Acetabular Cup ◽  
Stainless Steel 316L ◽  
Artificial Hip Joint ◽  
Artificial Hip ◽  
Steel Aisi ◽  
Preliminary Study ◽  
Ultra High Molecular Weight ◽  
Stainless Steel Aisi

Stainless steel AISI 316L (SS316L) and ultra-high molecular weight polyethylene (UHMWPE) are widely used materials for artificial hip joint components. The SS316L material is typically used for the acetabular cup, femoral head and the stem, while the UHMWPE material is used for the acetabular liner in an artificial hip joint. The aim of this work is to study the biocompatibility of SS316L and UHMWPE materials by implanting and installing these materials in the tissues of rabbits. The tissues around the implants were examined after eight weeks of the installment. Results showed that the reaction of the rabbit tissues around the implants was positive. It was concluded that the SS316L and the UHMWPE materials are biocompatible and the applications of these materials for implants seems conceivable.

Lubrication Model of an Artificial Hip Joint: Pressure Profile Versus Inclination Angle of the Acetabular Cup

1999 ◽  
Vol 121 (3) ◽  
pp. 492-498 ◽  
Author(s):  
Donna M. Meyer ◽  
John A. Tichy
Keyword(s):  
Inclination Angle ◽  
Hip Joint ◽  
Hip Prosthesis ◽  
Fluid Pressure ◽  
Vertical Direction ◽  
Mass Conservation ◽  
Acetabular Cup ◽  
Film Rupture ◽  
Artificial Hip Joint ◽  
Artificial Hip

Formulation of a three-dimensional, quasi-static lubrication model of an artificial hip joint is proposed which includes the inclination angle of the acetabular cup. This is performed by deriving a transformed Reynolds equation accounting for this cup tilt angle. The numerical simulation also addresses mass conservation at the location of film rupture. A 3-D spherical representation of the articulating surfaces of the hip prosthesis is mapped onto a cartesian coordinate system of the entire geometry of the “ball and socket” joint. Results include the lubricating fluid pressure distributions for various inclination angles of the acetabular cup demonstrating that the greatest pressures occur for large eccentricities in the upward vertical direction.

scholarly journals A model-based approach to stabilizing crutch supported paraplegic standing by artificial hip joint stiffness

2003 ◽  
Vol 11 (4) ◽  
pp. 443-451 ◽  
Author(s):  
J.H. van der Spek ◽  
P.H. Veltink ◽  
H.J. Hermens ◽  
B.F.J.M. Koopman ◽  
H.B.K. Boom
Keyword(s):  
Hip Joint ◽  
Joint Stiffness ◽  
Model Based ◽  
Artificial Hip Joint ◽  
Artificial Hip
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