Category Archives: Metal Ions/Pseudotumors
Updated Guidelines To Monitor Metal on Metal Devices by UK’s MHRA 2017
Original MEDICAL DEVICE ALERT by UK MHRA 2017 Available Here The Medicines and Healthcare products Regulatory Agency (MHRA) UK has called for longer-term monitoring of all patients fitted with metal-on-metal hip implants, as a precautionary measure, in an update to its original guidance issued in 2012. “MHRA, in colsultation with … Continue reading →
Metal in Total Hip Arthroplasty: Wear Particles, Biology, and Diagnosis
Very Interesting article explaining metal on metal wear in total hip replacement which is similar to hip resurfacing mom devices. Read Article Here Continue reading →
Normal Levels of Cobalt and Chromium after Hip Resurfacing
View Complete Study Here Studies were searched for in the Medline database, Embase, and the Cochrane Database of Systematic Reviews. Highest mean or median ion concentrations of Cr and Co after a minimum of 1 year of follow-up were extracted and grouped according to sample- and articulation type, and average … Continue reading →
Guidelines to Follow-Up MOM Devices Not Cost Effective
Original Article Here A new study about adverse reactions to metal debris after Metal on Metal THR and Hip Resurfacing shows the current follow-up guidelines worldwide are not cost effective or evidence-based. The follow-up guidelines for metal-on-metal (MoM) hip arthroplasty and hip resurfacing from five worldwide authorities worldwide, including the U.K. were included. … Continue reading →
Blood cobalt levels, device type may predict metal-on-metal hip failure study 2014
The clinical implications of elevated blood metal ion concentrations in asymptomatic patients with MoM hip resurfacings: a cohort study David J Langton, Raghavendra P Sidaginamale, Thomas J Joyce, Shonali Natu, Peter Blain, Robert Drysdale Jefferson, Stephen Rushton, Antoni V F Nargol Full Study Here 10.1136/ bmjopen-2012-001541 January 31, 2014 Objective: To determine whether elevated blood… Continue reading →
Two-year Study of serum metal ion levels in hipresurfacing 2014
Two-year serum metal ion levels in minimally invasive total conservative hip resurfacing: preliminary results of a prospective study Tai SM1, Millard N, Munir S, Jenabzadeh AR, Walter LR, Walter WL. Complete Study http://www.ncbi.nlm.nih.gov/pubmed/25288230 Metal-on-metal (MoM) hip resurfacings have been associated with the potential development of metallic debris and its associated pathology. Serum cobalt and chromium… Continue reading →
Metal ion release following hip replacement
Metal ion release following hip replacement not strongly related to patient activity medical study Updated 3/9/2010 Metal ion release following hip replacement not strongly related to patient activity Read Complete Article by Clicking Here The amount of patient activity following metal-on-metal hip resurfacing arthroplasty seems to show little correlation to metal ion release, according… Continue reading →
The effect of component size and metal ions after resurfacing arthroplasty
Updated 7/28/09 The effect of component size and orientation on the concentrations of metal ions after resurfacing arthroplasty of the hip 2008 Link Read Complete Article by Clicking HereD. J. Langton, MRCS, Orthopaedic Research Register1; S. S. Jameson, MRCS, Specialist Registrar, Trauma and Orthopaedics1; T. J. Joyce, MSc, PhD, MA, BEng, Lecturer in Bioengineering2; J.… Continue reading →
Soft Tissue Reactions to Metal-on-Metal Arthroplasty
Updated 8/17/09 Read Complete Article Here By Robert Trace September 17, 2009 MANCHESTER – Researchers here reported that adverse soft tissue reactions following metal-on-metal hip arthroplasty are typically due to increased wear of the bearing surfaces, and patients with smaller femoral heads may be particularly susceptible to these complications. In an independent center study, David… Continue reading →
Risk Factors for Inflammatory Pseudotumour Formation Study
Updated 12/21/09 Abstract: Risk factors for inflammatory pseudotumour formation following hip resurfacing Complete Study http://www.jbjs.org.uk/cgi/content/abstract/91-B/12/1566 S. Glyn-Jones, MA, FRCS(Orth), DPhil, Senior Lecturer, Consultant Orthopaedic Surgeon1; H. Pandit, FRCS(Orth), Senior Clinical Fellow1; Y.-M. Kwon, FRCS(Orth), FRACS(Orth), Research Fellow1; H. Doll, MSc, DPhil, Senior Medical Statistician2; H. S. Gill, BEng, DPhil, University Lecturer in Orthopaedic Engineering1; and… Continue reading →
Distribution of Chromium and Cobalt Ions Resurfacing Hip Arthroplasty
Updated 8/29/08 Leonard R. Walter MBBS(Syd), FRACS, FAOrthA, Ed Marel MBBS(Syd), FRCS Ed (Orth), FRACS, FAOrthAa, Richard Harbury MBBS(Syd), FRACS, FAOrthAa and Jenny Wearne RN aPeninsula Orthopaedics Research Institute, DEE WHY NSW 2099, Australia Received 28 November 2006; accepted 7 July 2007 Abstract The most appropriate blood fraction for the measurement of metal ions in… Continue reading →
Metal Ion Study 2002
Medium Term Serum Cobalt and Chromium Levels in Patients with Metal-metal Resurfacing NOTE: This paper was presented at the New Trends of Joint Reconstructive Surgery 2002 Meeting, comparing serum levels in a control group, conventional THR, McKee Farrar, MOM Hip Resurfacing, and MOM THR (Sulzer), which concluded that metal ion levels are higher at 1… Continue reading →
The Influence of Head Diameter, Clearance, Cup Position, and Head Position on Wear Rates in Metal-on-Metal Resurfacing
Updated 1/8/09 Presented at the 2nd Annual Total Hip Resurfacing Arthroplasty Course in LA Oct. 2008 By: John Fisher Co-Authors: Ian Leslie, Sophie Williams, Eileen Ingham, Graham Isaac Institute of Medical and Biological Engineering University of Leeds Background: There are considerable variations in metal ion levels and metallic wear rates in patients with metal on… Continue reading →
ASR vs Birmingham Hip Resurfacing Metal Ions
Updated 10/16/09 Blood metal ion concentrations after hip resurfacing arthroplasty A COMPARATIVE STUDY OF ARTICULAR SURFACE REPLACEMENTAND BIRMINGHAM HIP RESURFACING ARTHROPLASTIES Summary There have been no large comparative studies of the blood levels of metal ions after implantation of commercially available hip resurfacing devices which have taken into account the effects of femoral size and… Continue reading →
Metal Ions in Offspring after hip resurfacing
Study of cobalt and chromium levels in offspring of patients with metal-on-metal hip implants Updated 11/9/09 03/09/2010"You Have Your MoM’s Ions" Study finds elevated levels of cobalt and chromium in offspring of patients with metal-on-metal hip implants NEW ORLEANS, LA Hip replacement patients with metal-on-metal (MoM) implants (both the socket and hip ball are… Continue reading →
Metal ion levels and revision rates in metal-on-metal hip resurfacing arthroplasty 2014
Complete Study Here: http://www.ncbi.nlm.nih.gov/pubmed/24500833 Robinson PG1, Wilkinson AJ, Meek RM. April 2014 Abstract Metal-on-metal (MoM) bearings in hip surgery are related to increased blood levels of metal ions. The nature of the relationship between ion levels and failure is still not fully understood. This study compares three cohorts of patients, 120 patients in each… Continue reading →
Second generation metal-on-metal hip implants associated with adverse reactions 2014
Full Article Available Here January 9, 2014 Research into metal-on-metal hip arthroplasty has showed that success with the procedure is multifactorial. Some investigators have found it may be closely related to an exacting surgical technique and the right indications. In an article in a recent issue of Orthopaedics Today Europe, Japanese investigators discussed adverse reactions associated with… Continue reading →