scholarly journals Mid-Term Review of ADEPT Metal-On-Metal Hip Prosthesis. Functional, Radiological and Metal Ion Analysis

2014 ◽  
Vol 04 (02) ◽  
pp. 38-43
Author(s):  
James G. A. Plant ◽  
Gareth H. Prosser ◽  
Ben J. Burston ◽  
Stephen J. Edmondston ◽  
Piers J. Yates
Keyword(s):  
Metal Ion ◽  
Hip Prosthesis ◽  
Metal Ion Analysis ◽  
Metal On Metal ◽  
Ion Analysis

Prevalence of Pseudotumor in Patients After Metal-On-Metal Hip Arthroplasty Evaluated with Metal Ion Analysis and MARS-MRI

2016 ◽  
Vol 31 (1) ◽  
pp. 260-263 ◽  
Author(s):  
Sean A. Sutphen ◽  
Lewis H. MacLaughlin ◽  
Adam A. Madsen ◽  
Jackie H. Russell ◽  
Michael A. McShane
Keyword(s):  
Hip Arthroplasty ◽  
Metal Ion ◽  
Metal Ion Analysis ◽  
Metal On Metal ◽  
Ion Analysis

scholarly journals Metal-on-metal total hip arthroplasty: does increasing modularity affect clinical outcome?

2020 ◽  
pp. 112070002097927
Author(s):  
Kevin C Ilo ◽  
Harry S Hothi ◽  
John A Skinner ◽  
Alister J Hart
Keyword(s):  
Metal Ion ◽  
Hip Prosthesis ◽  
Tissue Reaction ◽  
Bearing Surface ◽  
Adverse Local Tissue Reaction ◽  
Material Loss ◽  
Local Tissue ◽  
Local Tissue Reaction ◽  
Metal On Metal ◽  
Modular Implants

Background: Modularity of metal-on-metal (MoM) implants has come under scrutiny due to concerns regarding additional sources of metal debris. This study is a retrieval analysis of implants from the same manufacturer with the same MoM bearing surface. The difference between the implants was presence or absence of modular junctions. Methods: This is a retrospective study of 31 retrieved implants from 31 patients who received a Conserve Wright Medical MoM hip prosthesis. The 31 implants consisted of 16 resurfacings and 15 implants with modular junctions; 4 conventional THAs and 11 modular-neck THAs. Results: 43% of pre-revision MRI scans performed on resurfacing implants and 91% performed on the modular implants illustrated evidence of an adverse local tissue reaction. There was no difference in pre-revision blood metal ion levels or bearing surface wear between the resurfacings and modular implants. The neck-head tapers of the modular group showed low levels of material loss. However, the neck-stem tapers showed increased severity of corrosion and material loss Conclusions: The modular implants had an increased incidence of adverse local tissue reaction. This could be related to the presence of modular junctions, particular the neck-stem junction which showed increased susceptibly to corrosion

Characterization of the Running-in Period in Total Hip Resurfacing Arthroplasty: An in Vivo and in Vitro Metal Ion Analysis

2008 ◽  
Vol 90 (Suppl 3) ◽  
pp. 125-133 ◽  
Author(s):  
Christian Heisel ◽  
Nikolaus Streich ◽  
Michael Krachler ◽  
Eike Jakubowitz ◽  
J Philippe Kretzer
Keyword(s):  
Metal Ion ◽  
Hip Resurfacing ◽  
Hip Resurfacing Arthroplasty ◽  
Total Hip ◽  
Resurfacing Arthroplasty ◽  
Metal Ion Analysis ◽  
Ion Analysis

Metal ion concentrations after metal-on-metal hip arthroplasty are not correlated with habitual physical activity levels

2018 ◽  
Vol 29 (6) ◽  
pp. 638-646 ◽  
Author(s):  
Jetse Jelsma ◽  
Martijn GM Schotanus ◽  
Rachel Senden ◽  
Ide C Heyligers ◽  
Bernd Grimm
Keyword(s):  
Physical Activity ◽  
At Risk ◽  
Daily Living ◽  
Metal Ion ◽  
Hip Prosthesis ◽  
Habitual Physical Activity ◽  
Activity Levels ◽  
Ion Concentrations ◽  
Metal On Metal ◽  
Physical Activity Levels

Introduction: Metal-on-metal (MoM) hip arthroplasties have shown high clinical failure rates with many patients at risk for a revision and under surveillance for high metal ion concentrations. Implant wear releasing such ions is assumed to be a function of use, i.e. the patient’s physical activity. This study aimed to assess whether habitual physical activity levels of MoM patients are correlated with metal ion concentrations and are higher in patients with high (at risk) than in patients with low (safe) metal ion concentrations. Methods: A cohort study was conducted of patients with any type of MoM hip prosthesis. Metal ion concentrations were determined using ICP-MS. Habitual physical activity of subjects was measured in daily living using an acceleration-based activity monitor. Outcome consisted of quantitative and qualitative activity parameters. Results: In total, 62 patients were included. Mean age at surgery was 60.8 ± 9.3 years and follow-up was 6.3 ± 1.4 years. Cobalt concentrations were highly elevated overall (112.4 ± 137.9 nmol/L) and significantly more in bilateral (184.8 ± 106.5 nmol/L) than in unilateral cases (87.8 ± 139.4 nmol/L). No correlations were found between physical activity parameters and metal ion concentrations. Subgroup analysis of patients with low versus high cobalt concentration showed no significant differences in habitual physical activity. Discussion: No correlation was found between physical activity levels and metal ion concentrations. Implant use by normal habitual activities of daily living seems not to influence metal ion concentrations.

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