metal-on-metal hip replacement
Effects of cobalt and chromium ions at clinically equivalent concentrations after metal-on-metal hip replacement on human osteoblasts and osteoclasts: implications for skeletal health
... Metal-on-metal hip replacement (MOMHR) using large diameter bearings has become a popular alternative to conventional total hip arthroplasty, but is associated with elevated local ...
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Hip resurfacing: mid-term results of the last-generation metal-on-metal devices
... total hip replacement [17, ...of hip resurfacing? And, in case a failed resurfacing is even- tually converted to a total hip replacement, will the long- term results of that procedure ...
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Balancing innovation and medical device regulation: the case of modern metal-on-metal hip replacements
... conventional metal-on-polyethylene total hip replacements, there has been a shift toward alternative bearing systems, including metal-on-metal (MoM), for younger, more active patients with ...
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The contact mechanics and occurrence of edge loading in modular metal-on-polyethylene total hip replacement during daily activities
... The present study demonstrated that for normal walking, ascending and 321 descending stairs activities, the cup inclination angles had a leading effect on the contact 322 pressures at th[r] ...
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Metal on Metal Resurfacing Hip Arthroplasty for Hip Arthritis : A Short Term Outcome Analysis
... particulate metal has been shown to cause the release of inflammatory cytokines from macrophages and wear-induced osteolysis is occasionally reported, usually as a consequence of metallosis from malfunctioning ...
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Retrospective cohort study of the performance of the Pinnacle metal on metal (MoM) total hip replacement: a single-centre investigation in combination with the findings of a national retrieval centre
... MoM hip is that of variation brought about by manufacturing ...Pinnacle hip system were produced with dia- metrical clearances outside of the manufacturers ’ stated ...
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Magnetic resonance imaging of metal artifact reduction sequences in the assessment of metal-on-metal hip prostheses
... of metal, a steep susceptibility field gradient will spread the phases across a voxel ...total hip replacement (C) is reduced to a 3 mm thick slice (D) with all other parameters remaining ...
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Pseudotumor in metal-on-metal hip arthroplasty: a comparison study of three grading systems with MRI
... painful metal-on-metal total hip ...after metal-on-metal hip resurfacing ...following metal-on-metal resurfacing of the ...
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The Effect of Microseparation on Corrosion Rates of Metal-on-Metal Total Hip Replacements
... These “adverse loading” conditions have been observed to cause an increased wear rate for MoM devices. The importance of surgical technique during implantation of MoM bearings has therefore been stressed within the ...
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Effect of microseparation on contact mechanics in metal-on-metal hip replacements-A finite element analysis.
... in hip joint replacement relate to translational and rotational malpositioning of the ...of hip joints or subluxation, for which a translation of the head relative to the cup occurs leading to ...
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Diagnostic utility of joint fluid metal ion measurement for histopathological findings in metal on metal hip replacements
... Surface Replacement (ASR) THA (US Food and Drug Administration, FDA, approved) or total hip resur- facing arthroplasty (FDA not approved) (DePuy, Warsaw, IN) were performed consecutively in 887 patients at ...
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Contact mechanics of modular metal-on-polyethylene total hip replacement under adverse edge loading conditions
... a hip joint simulator can successfully reproduce clinically relevant wear rates, wear patterns and wear particle distributions for both metal-on-metal (MoM) and ceramic-on- ceramic (CoC) ...
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A comparison of leg length and femoral offset discrepancies in hip resurfacing, large head metal-on- metal and conventional total hip replacement: a case series
... two hip replacements, large head metal-on- metal and small head THRs showed a significant differ- ence between the operated and unoperated femoral off- sets (Table ...of hip resurfacing is ...
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Investigation in failure analysis and materials selection in total hip replacement prosthesis
... conventional metal on polyethylene bearing surfaces generates particulate polyethylene ...as metal-on-metal, ceramic-on-polyethylene and ceramic-on-ceramic have shown to reduce friction rates and ...
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The composition of tribofilms produced on metal-on-metal hip bearings.
... joint replacement is the most successful treatment for end stage arthritis, and was used to restore functionality to over 85,000 people in the UK over 2011/12 ...joint replacement that can last the extent ...
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Metal on metal hip resurfacing versus uncemented custom total hip replacement - early results
... debilitating hip osteoarthritis in patients under 65 years of age. Total hip arthroplasty was offered if there was radiological evidence osteopaenia or seg- mental collapse of the femoral ...
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Review Article Compare the revision rate of metal-on-metal and metal-on-polyethylene for total hip replacement: a meta-analysis
... Harris hip scores and radiographic outcomes as mea- sured by radiolucent lines between MOM and conventional THA; However, with the increase complication rate, the greater cost, and the potential for adverse ...
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Failure analysis of cemented metal-on-metal total hip replacements from a single centre cohort
... TPS™ hip replacement systems metal–on–metal hip replacements had to undergo early revision at the Norfolk and Norwich University ...toxic metal ions such as cobalt and chromium ...
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Blood metal ions after hybrid metal-on-polyethylene Exeter−Trident total hip replacement
... The findings from the recent previous study carried out at our unit showed increased Co levels in patients with a 36-mm head in comparison to patients with a 28-mm head in Trident-Accolade MoP THRs [28]. These findings ...
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A comparison of friction in 28 mm conventional and 55 mm resurfacing metal-on-metal hip replacements
... diameter metal bearing with a conventional metal-on-metal total hip replacement, examining the influence of lubricant and swing phase ...
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