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Showing 1 to 12 of 12 for “"Hip Resurfacing"”.
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Effects of Reamer-Femoral Component Offset on Cement Mantle Penetration in Hip Resurfacing Arthroplasty
Hip resurfacing arthroplasty has changed the treatment of end stage arthritis without severe deformity for young, active adults. Presently, there are varying clinical approaches to implant design selection and cementation techniques. The purpose of this project is to determine what amount of …
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Development of musculoskeletal models for the design and the pre-clinical validation of hip resurfacing prosthesis
… The surgical treatment of dysfunctional hips is a severe condition for the patient and a costly therapy for the public health. Hip resurfacing techniques seem to hold the promise of various advantages over traditional THR, with particular attention to young and active patients. Although …
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Exploring the range of motion between the acetabular component and the femoral component in hip resurfacing
… components is crucial to retain the natural hip Range of Motion (RoM) in hip resurfacing, as well as prevent accelerated wear and subsequent premature component failure. Currently, magnetic resonance images and anterior-posterior radiographs are commonly used to diagnose and assess …
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Radiological features of femoroacetabular impingement in patients undergoing hip resurfacing arthroplasty and total hip arthroplasty for osteoarthritis of the hip
Osteoarthritis of the hip is a common condition which in its later stages often requires arthroplasty surgery. The principle operations performed for late stage osteoarthritis are the Birmingham Hip Resurfacing (BHR) and Total Hip replacement (THR), which require implants that have been through …
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Friction and lubrication behaviour of hip resurfacing metal-on-metal and ZTA ceramic on CFR peek implants with various diameters and clearances. Friction and lubrication behaviour of hip resurfacing Co-Cr-Mo and zirconia toughened alumina ceramic heads against carbon fibre reinforced poly-ether-ether-ketone cups with various diameters and clearances have been investigated using serum-based lubricants.
Total hip joint prostheses made of CoCrMo heads versus ultra high molecular weight polyethylene (UHMWPE) cups have a limited lifetime, mainly due to the wear of the UHMWPE cups as a result of high friction between the articulating surfaces leading to osteolysis and implant loosening with revision …
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The effect of clearance upon friction and lubrication of large diameter hip resurfacing prosthesis using blood and combinations of bovine serum with aqueous solutions of CMC and hyaluronic acid as lubricants.
… of a group of Smith and Nephew Birmingham Hip Resurfacing implants with a nominal diameter of 50mm and diametral clearances in the range ~ 80 2m to 300 2m, in the presence of blood (clotted and whole blood), a combination of bovine serum (BS) with hyaluronic acid (HA) and carboxymethyl …
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The corrosion of CoCrMo alloys for biomedical applications
… are now frequently used for the metal-on-metal hip resurfacing joints due to their high corrosion and wear performance. The present project was carried out to investigate the feasibility of taking electrochemical measurements from hip resurfacing joints whilst articulating in a hip simulator. In …
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Modeling the Long Term Effects of Alendronate on Bone Mass Preservation of the Femur with Articular Surface and Total Hip Replacements
Calculating femoral bone density changes after hip arthroplasty is of interest to researchers and clinicians for predicting the longevity of the prosthetic implant and the surrounding bone. Recently clinicians have been administering bisphosphonate drugs in an attempt to reduce the bone resorption …
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Friction and lubrication behaviour of metal-on-metal and ZTA ceramic-on-CFR PEEK hip prostheses. Friction and lubrication behaviour of metal-on-metal hip resurfacing and ZTA ceramic heads versus CFR PEEK cups wiith various diameters and clearances using serum-based lubricants with various viscosities.
The natural hip joint in healthy people has a very low friction with very little (or no) wear. It works as a dynamically loaded bearing and is subjected to about 1-2 million cycles of loading per year. The applied load is the body weight which is tripled when walking and even higher during other …
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Morphology and Localisation of Patient Hip Replacement-Derived Debris and Hip Prostheses Materials in Macrophages
Whilst total hip replacement and hip resurfacing arthroplasties have been largely successful to relieve pain and restore mobility for patients, aseptic loosening is still the most common cause for revision surgery. It is thought there is a contribution from both the sensitivity to the debris …
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Characterization and computational modelling of acrylic bone cement polymerisation
… thermal necrosis in the bone surrounding both a hip resurfacing implant and a knee replacement. Using the output reaction path produced by the thermal model a mechanical model was also produced simulating the shrinkage and mechanical property evolution exhibited by the polymerising cement. Two …
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Primary stability in cementless total hip replacement: measurement techniques and aided-surgery
Primary stability of stems in cementless total hip replacements is recognized to play a critical role for long-term survival and thus for the success of the overall surgical procedure. In Literature, several studies addressed this important issue. Different approaches have been explored aiming to …