scholarly journals A study of the sonic resonance of the femoral part of HIP endoprosthesis

2021 ◽  
Vol 55 (1) ◽  
pp. 15-18
Author(s):  
I. Belič ◽  
B. Klopčič ◽  
A. Logar ◽  
M. Jenko ◽  
D. Dolinar ◽  
...  
Keyword(s):  
Hip Endoprosthesis

Finite Element Analysis of Poor Distal Contact of the Femoral Component of a Cementless Hip Endoprosthesis

1993 ◽  
Vol 207 (4) ◽  
pp. 255-261 ◽  
Author(s):  
M Taylor ◽  
E W Abel
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Influencing Factor ◽  
Three Dimensional ◽  
Stress Distributions ◽  
Element Analysis ◽  
Hip Endoprosthesis ◽  
Applied Loading ◽  
Femoral Geometry ◽  
Contact Models

The difficulty of achieving good distal contact between a cementless hip endoprosthesis and the femur is well established. This finite element study investigates the effect on the stress distribution within the femur due to varying lengths of distal gap. Three-dimensional anatomical models of two different sized femurs were generated, based upon computer tomograph scans of two cadaveric specimens. A further six models were derived from each original model, with distal gaps varying from 10 to 60 mm in length. The resulting stress distributions within these were compared to the uniform contact models. The extent to which femoral geometry was an influencing factor on the stress distribution within the bone was also studied. Lack of distal contact with the prosthesis was found not to affect the proximal stress distribution within the femur, for distal gap lengths of up to 60 mm. In the region of no distal contact, the stress within the femur was at normal physiological levels associated with the applied loading and boundary conditions. The femoral geometry was found to have little influence on the stress distribution within the cortical bone. Although localized variations were noted, both femurs exhibited the same general stress distribution pattern.

Recommendations with Respect to the Improvement of Lubricating Qualities of Synovial Fluid in Artificial Joints

1993 ◽  
Vol 207 (2) ◽  
pp. 111-114 ◽  
Author(s):  
N S Gavrjushenko
Keyword(s):  
Synovial Fluid ◽  
Short Description ◽  
Plate Model ◽  
Red Bone Marrow ◽  
Artificial Joints ◽  
Hip Endoprosthesis ◽  
New Approach ◽  
Red Marrow ◽  
Ultra High Molecular Weight ◽  
Lubricating Properties

This paper gives a short description of the lubricating properties of yellow and red bone marrow taken from a femur of a cadaver. The experiments have been conducted on a ‘ball-on-plate’ model. The balls were made from steel 100 CR6 (German) and the plates were made from the same steel and ultra-high molecular weight polyethylene (UHMWPE, German ‘Herulen’). The friction coefficients under loads of 50 and 300 N were determined with different combinations of friction components. It has been found that the lubricating properties of yellow and red marrow have advantages over synovial fluid. In the light of these results the author develops a new approach to the design of a new hip endoprosthesis.

scholarly journals Very low wear rate measured in a hip endoprosthesis removed after 38 years

2006 ◽  
Vol 7 (2) ◽  
pp. 80-83
Author(s):  
G. Maccauro ◽  
R. Sgrambiglia ◽  
T. Micelli ◽  
V. De Santis ◽  
F. Muratori ◽  
...  
Keyword(s):  
Wear Rate ◽  
Hip Endoprosthesis ◽  
Low Wear

scholarly journals Clinical review of painful hip endoprosthesis.

1986 ◽  
Vol 35 (2) ◽  
pp. 562-564
Author(s):  
Nobuo Sai ◽  
Kenji Shitama ◽  
Mikio Tanaka ◽  
Nahoto Takagishi
Keyword(s):  
Clinical Review ◽  
Hip Endoprosthesis ◽  
Painful Hip

scholarly journals Toll-like receptors and aseptic loosening of hip endoprosthesis-a potential to respond against danger signals?

2009 ◽  
Vol 28 (2) ◽  
pp. 184-190 ◽  
Author(s):  
Tuomas Lähdeoja ◽  
Jukka Pajarinen ◽  
Vesa-Petteri Kouri ◽  
Tarvo Sillat ◽  
Jari Salo ◽  
...  
Keyword(s):  
Aseptic Loosening ◽  
Toll Like Receptors ◽  
Hip Endoprosthesis ◽  
Danger Signals

Influence of particulate and dissociated metal-on-metal hip endoprosthesis wear on mesenchymal stromal cells in vivo and in vitro

Biomaterials ◽  
2016 ◽  
Vol 98 ◽  
pp. 31-40 ◽  
Author(s):  
Anastasia Rakow ◽  
Janosch Schoon ◽  
Anke Dienelt ◽  
Thilo John ◽  
Martin Textor ◽  
...  
Keyword(s):  
Mesenchymal Stromal Cells ◽  
Stromal Cells ◽  
Hip Endoprosthesis ◽  
Metal On Metal

Patient-Specific Modelling for Preoperative Estimation of Hip Mechanics for Improved Planning of Total Hip Endoprosthesis Using Multibody Simulations

2021 ◽  
pp. 1088-1096
Author(s):  
Irina Leher ◽  
Christopher Fleischmann ◽  
David Scherb ◽  
Marius Kollerer ◽  
Jörg Miehling ◽  
...  
Keyword(s):  
Patient Specific ◽  
Hip Endoprosthesis ◽  
Total Hip

CPM-therapy in rehabilitation of patients after hip endoprosthesis

2020 ◽  
Author(s):  
K. S. Amelekhina ◽  
◽  
E. M. Savelyeva ◽  
V. A. Kolyshenkov
Keyword(s):  
Hip Endoprosthesis
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