scholarly journals Is in-vivo sensing in a total hip replacement a possibility? A review on past systems and future challenges.

2021 ◽  
Author(s):  
Oliver George Vickers ◽  
Peter R Culmer ◽  
Graham Isaac ◽  
Robert Kay ◽  
Matthew Peter Shuttleworth ◽  
...  
Keyword(s):  
Total Hip Replacement ◽  
Hip Replacement ◽  
Total Hip ◽  
Future Challenges ◽  
In Vivo Sensing

Acoustic Vibration and Mechanical In Vivo Analysis of the Hip Joint After a Total Hip Arthroplasty

2007 ◽  
Author(s):  
D. A. Glaser ◽  
R. D. Komistek ◽  
H. E. Cates ◽  
M. Mahfouz
Keyword(s):  
Femoral Head ◽  
Total Hip Replacement ◽  
Hip Joint ◽  
Hip Replacement ◽  
Acoustic Vibration ◽  
Valuable Insight ◽  
Acetabular Cup ◽  
Total Hip ◽  
Resonance Frequencies

The major complications following total hip replacement (THA) are implant loosening, dislocation, instability, fracture and infection. It is hypothesized that vibration, in the range of the resonance frequencies, may cause pain, bone degeneration and fracture. A further understanding of the physical response resulting from impact during femoral head sliding may lead to valuable insight pertaining to THA failure. Therefore, the first objective of this present study was to determine if frequencies propagating through the hip joint near resonant frequencies may lead to wear or loosening of the components. Recently, studies found that femoral head sliding, often referred to as hip separation, between the acetabulum cup and the femoral head does occur, which may also play a role in complications observed with THA today, but a the effects of hip separation and the causes of its occurrence has not been studied as jet. Therefore, the second objective of this study was to determine if a sound sensor, externally attached, could be used to correlate impact loading sounds from femoral head sliding in the acetabular cup. Additional objective of this study was to develop a mathematical model that better simulates the in vivo loading conditions of total hip replacement patients using in vivo fluoroscopic and ground reaction data as input.

Ion release in ceramic bearings for total hip replacement: Results from an in vitro and an in vivo study

2017 ◽  
Vol 42 (1) ◽  
pp. 65-70 ◽  
Author(s):  
Jan Philippe Kretzer ◽  
Ulrike Mueller ◽  
Marcus R. Streit ◽  
Hartmuth Kiefer ◽  
Robert Sonntag ◽  
...  
Keyword(s):  
Total Hip Replacement ◽  
Hip Replacement ◽  
In Vivo Study ◽  
Ion Release ◽  
Total Hip

scholarly journals Reproduction of fretting wear at the stem—cement interface in total hip replacement

2007 ◽  
Vol 221 (8) ◽  
pp. 963-971 ◽  
Author(s):  
L Brown ◽  
H Zhang ◽  
L Blunt ◽  
S Barrans
Keyword(s):  
Bone Cement ◽  
Total Hip Replacement ◽  
Hip Replacement ◽  
Fatigue Cracks ◽  
Cement Mantle ◽  
Fretting Wear ◽  
Cement Interface ◽  
Total Hip

The stem-cement interface experiences fretting wear in vivo due to low-amplitude oscillatory micromotion under physiological loading, as a consequence it is considered to play an important part in the overall wear of cemented total hip replacement. Despite its potential significance, in-vitro simulation to reproduce fretting wear has seldom been attempted and even then with only limited success. In the present study, fretting wear was successfully reproduced at the stem-cement interface through an in-vitro wear simulation, which was performed in part with reference to ISO 7206-4: 2002. The wear locations compared well with the results of retrieval studies. There was no evidence of bone cement transfer films on the stem surface and no fatigue cracks in the cement mantle. The cement surface was severely damaged in those areas in contact with the fretting zones on the stem surface, with retention of cement debris in the micropores. Furthermore, it was suggested that these micropores contributed to initiation and propagation of fretting wear. This study gave scope for further comparative study of the influence of stem geometry, stem surface finish, and bone cement brand on generation of fretting wear.

Cross-Linking to Improve Thr Wear Performance

2002 ◽  
Vol 12 (2) ◽  
pp. 103-107 ◽  
Author(s):  
R.D. Crowninshield ◽  
M.P. Laurent ◽  
J.Q. Yao ◽  
S.K. Bhambri ◽  
R.A. Gsell ◽  
...  
Keyword(s):  
Total Hip Replacement ◽  
Hip Replacement ◽  
Polyethylene Wear ◽  
Clinical Investigation ◽  
Wear Testing ◽  
Cross Linking ◽  
Beam Radiation ◽  
Total Hip ◽  
Order Of Magnitude

Polyethylene wear and associated osteolysis can limit the longevity of total hip replacement. In recent years, many improvements have been made in the consolidation, manufacture, and sterilization of polyethylene acetabular components. These improvements provided reduced polyethylene wear and prolonged usefulness of total hip replacement. Recent advances in extensively cross-linking polyethylene offer the possibility to substantially further reduce wear in total hip replacement. Hip simulator wear testing demonstrates an order of magnitude reduction in wear resulting from cross-linking GUR 1050 polyethylene by exposure to 100 kGy of electron beam radiation followed by annealing to encourage cross-linking and to reduce residual free radicals. Clinical investigation will be required to validate the wear advantage of these materials in vivo.

In vitro and in vivo biocompatibility of Ti-6Al-4V titanium alloy and UHMWPE polymer for total hip replacement

2016 ◽  
Vol 3 (3) ◽  
Author(s):  
Ngoc Bich Vu ◽  
Nhung Hai Truong ◽  
Long Thanh Dang ◽  
Lan Thi Phi ◽  
Nga Thi-Thu Ho ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Total Hip Replacement ◽  
Hip Replacement ◽  
Total Hip

Changes in the bone-cement interface after total hip replacement. An in vivo animal study.

1982 ◽  
Vol 64 (8) ◽  
pp. 1188-1200 ◽  
Author(s):  
E L Radin ◽  
C T Rubin ◽  
E L Thrasher ◽  
L E Lanyon ◽  
A M Crugnola ◽  
...  
Keyword(s):  
Bone Cement ◽  
Animal Study ◽  
Total Hip Replacement ◽  
Hip Replacement ◽  
Cement Interface ◽  
Total Hip

3-D Model of a Total Hip Replacement In Vivo Providing Hydrodynamic Pressure and Film Thickness for Walking and Bicycling

2003 ◽  
Vol 125 (6) ◽  
pp. 777-784 ◽  
Author(s):  
Donna M. Meyer, ◽  
John A. Tichy,
Keyword(s):  
Total Hip Replacement ◽  
Hip Replacement ◽  
Hydrodynamic Lubrication ◽  
Hydrodynamic Pressure ◽  
Fluid Film ◽  
Joint Fluid ◽  
Acetabular Cup ◽  
Total Hip ◽  
Pressure Distributions

Formulation of a 3-D lubrication simulation of a total hip replacement in vivo is presented using a finite difference approach. The goal is to determine if hydrodynamic lubrication is taking place, how thick the joint fluid film is and over what percentage of two gait cycles, (walking and bicycling), the hydrodynamic lubricating action is occurring, if at all. The assumption of rigid surfaces is made, which is conservative in the sense that pure hydrodynamic lubrication is well known to predict thinner films than elastohydrodynamic lubrication (EHL) for the same loading. The simulation method includes addressing the angular velocity direction changes and accurate geometry configuration for the acetabular cup and femoral head components and provides a range of results for material combinations of CoCrMo-on-UHMWPE, CoCrMo-on-CoCrMo, and alumina-on-alumina components. Results are in the form of the joint fluid film pressure distributions, load components and film thicknesses of the joint fluid, for the gait cycles of walking and bicycling. Results show hydrodynamic action occurs in only about 10% of a walking gait cycle and throughout nearly 90% of a bicycling gait. During the 10% of the walking cycle that develops hydrodynamic lubrication, the minimum fluid film thicknesses are determined to be between 0.05 μm and 1.1 μm, while the range of film thicknesses for bicycling is between 0.1 μm and 1.4 μm, and occurs over 90% of the bicycling gait. Pressure distributions for these same periods are in the range of 2 MPa to 870 MPa for walking and 1 MPa to 24 MPa for bicycling.

scholarly journals Effects of Hip Abductor Strengthening on Musculoskeletal Loading in Hip Dysplasia Patients after Total Hip Replacement

2021 ◽  
Vol 11 (5) ◽  
pp. 2123
Author(s):  
Giordano Valente ◽  
Fulvia Taddei ◽  
Alberto Leardini ◽  
Maria Grazia Benedetti
Keyword(s):  
Total Hip Replacement ◽  
Hip Replacement ◽  
Hip Dysplasia ◽  
Functional Performance ◽  
Functional Improvement ◽  
Muscle Strengthening ◽  
Total Hip ◽  
Hip Abductor ◽  
Gait Function

Hip dysplasia patients after total hip replacement show worse functional performance compared to primary osteoarthritis patients, and unfortunately there is no research on muscle and joint loads that would help understand rehabilitation effects, motor dysfunctions and failure events. We tested the hypothesis that a higher functional improvement in hip dysplasia patients who received hip abductor strengthening after hip replacement, would result in different gait function and musculoskeletal loads during walking compared to patients who performed standard rehabilitation only. In vivo gait analysis and musculoskeletal modeling were used to analyze the differences in gait parameters and hip and muscle forces during walking between the two groups of patients. We found that, in a functional scenario of very mild abnormalities, the patients who performed muscle strengthening expressed a more physiological force pattern and a generally greater force in the operated limb, although statistically significant in limited portions of the gait cycle, and likely related to a higher gait speed. We conclude that in a low-demand task, the abductor strengthening program does not have a marked effect on hip loads, and further studies on hip dysplasia patients would help clarify the effect of muscle strengthening on loads.

Roentgen Stereophotogrammetric Analysis for Assessing Migration of Total Hip Replacement Femoral Components

1995 ◽  
Vol 209 (3) ◽  
pp. 169-175 ◽  
Author(s):  
J Kiss ◽  
D W Murray ◽  
A R Turner-Smith ◽  
C J Bulstrode
Keyword(s):  
Total Hip Replacement ◽  
Hip Replacement ◽  
Clinical Results ◽  
Three Dimensions ◽  
First Year ◽  
Total Hip ◽  
Roentgen Stereophotogrammetric Analysis ◽  
Early Migration ◽  
Analysis System

A new Roentgen stereophotogrammetric analysis system, using a biplane technique, has been developed to determine the migration and rotation of total hip replacement (THR) femoral components in three dimensions. Stainless steel marker balls were injected into the femur during the operation. The patients stood within a calibration frame during the X-ray. The two exposures were taken consecutively allowing radio-opaque shutters to be moved in front of the films to prevent fogging. Studies with a model demonstrated that the system was capable of measuring the position of an implant to better than 0.11 mm (2 SD)w. In vivo measurements demonstrated that the migration rate of the different parts of the femoral component could be determined with an accuracy of 0.25 to 0.50 mm/year. By considering the accuracy determined in different ways, methods for improving the system have been identified. The migration and rotation rate of 58 Hinek cemented femoral components was studied for four years. Migration was three to five times greater (p < 0.001) during the first year than subsequently. The prosthesis head moved the most during the first year (0.94 mm). A better understanding of the cause of implant failure could be obtained by studying the early migration of different types of prosthesis and comparing this with their clinical results and design features.

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