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Category Archives: DePuy Hip Replacement

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2013 – DePuy ASR hip replacements associated with osteolysis, other serious side-effects

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In 2013, a medical research team led by F. Randelli published an article in which it is stated “Patients with ASR implants (resurfacing and large-diameter (XL) metal-on-metal (MoM) total hip arthroplasty), even if asymptomatic and with a stable prosthesis, may present extremely high blood metal ion levels.”  This article was titled “Radiographically undetectable periprosthetic osteolysis… Continue Reading

2013 – Researchers Review Safety and Efficacy of DePuy ASR Hip Replacements

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In 2013, a team of researchers led by A. Reito published a paper in Clinical Orthopaedics and Related Research titled “High prevalence of adverse reactions to metal debris in small-headed ASR™ hips.” with two ideas in mind.  First, these researchers note that “There has been increasing concern of metal-on-metal (MOM) hip replacements regarding adverse reactions… Continue Reading

Research Shows: No Effect of Acetabular Inclination on Metal Ion Levels with DePuy ASR

Posted in DePuy Hip Replacement

Published online in June 2013 (print Jan. 2014) in The Journal of Arthroplasty, a study titled “The Effect of Acetabular Inclination on Metal Ion Levels Following Metal-on-Metal Hip Arthroplasty.” aimed to determine the degree to which the specific positioning of DePuy ASR hip replacement components changed blood metal ion levels in hip replacement patients. While… Continue Reading

2013 – DePuy ASR hips linked to high blood metal ion levels

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A 2013 article published in Hip International titled “Blood levels of cobalt and chromium are inversely correlated to head size after metal-on-metal resurfacing arthroplasty.” by a team of researchers led by MC Parry from the UK aimed to “assess the effect of head size, implant design and component positioning on metal production by resurfacing arthroplasties.”… Continue Reading

2013 – Study shows DePuy ASR failure rate 14.9% at 5 years

Posted in DePuy Hip Replacement

In a paper titled “Hip arthroplasty with the articular surface replacement (ASR) system: survivorship analysis and functional outcomes.” published in European Journal of Orthopaedic Surgery and Traumatology, the authors begin by stating “The articular surface replacement (ASR) hip resurfacing system, now withdrawn, has the highest all-cause revision rate (24.2 % at 7 years) compared with… Continue Reading

2013: Journal of Bone and Joint Surgery Connects High Blood Metal Ion Levels to DePuy ASR Hip Replacement Systems

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A 2013 article published in The Journal of Bone and Joint Surgery titled “Relationship of Plasma Metal Ions and Clinical and Imaging Findings in Patients with ASR XL Metal-on-Metal Total Hip Replacements.” evaluated the health outcomes of 156 consecutive ASR total hip replacement patients in a particular clinic and studied the plasma metal ion levels… Continue Reading

2013 – Study Shows: ASR Hip Replacements Cause High Blood Metal Ion Levels

Posted in DePuy Hip Replacement

A 2013 article titled “Clinical and radiographic outcomes of 139 hips with articular surface replacement total hip arthroplasty*.” published in The Israel Medical Association Journal by A. Kadar et al. examined 139 uses of the Articular Surface Replacement (ASR; DePuy Orthopaedics Inc.) in a particular clinic and evaluated health outcomes and implant vitality. Kadar et… Continue Reading

2011 – Australian Joint Registry Finds 10% Revision Rate for DePuy ASR

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In 2011, a report published in The Journal of Bone and Joint Surgery by RN de Steiger et al. “summarizes an analysis by the Australian Orthopaedic Association National Joint Replacement Registry (AOANJRR) of the outcome of arthroplasties involving the ASR prostheses.” The Articular Surface Replacement (ASR) “metal-on-metal” hip implant by DePuy Orthopaedics, Inc. was recalled… Continue Reading

UK Government Agency Issues Alert for Complications with Metal-on-Metal Hips

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A 2010 Medical Device Alert by the UK’s Medicines and Healthcare products Regulatory Agency (MHRA) – the equivalent of the FDA in the United States, made the following announcement regarding the safety of metal-on-metal (MoM) hip replacement systems. “The majority of patients implanted with MoM hip replacements have well functioning hips and are thought to be… Continue Reading

Some metal-on-metal hips release fewer metal ions into the blood

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A presentation at the 2010 annual meeting of the American Academy of Orthopaedic Surgeons titled “Clinical Follow-up and Metal Ions in Blood of Patients with Hip Resurfacing” demonstrated how different metal-on-metal hip replacements are associated with different levels of metal ions in the blood, a potentially-dangerous complication frequently observed in metal-on-metal hip replacement patients. This… Continue Reading

2010 – Certain Acetabular Angles Produce Less Pseudotumors in Metal-on-Metal Hip Implants

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One doctor at the 2010 annual meeting of the American Academy of Orthopaedic Surgeons presented findings in a report titled “The role of acetabular component positioning in the development of Inflammatory Pseudotumors“. This surgeon, one George A. Grammatopoulos, MRCS notes that “acetabular component orientation is known to influence wear of metal-on-metal hip replacement bearings” and… Continue Reading

2010 – American Academy of Orthopaedic Surgeons Concerned about Metal-on-Metal Hip Implants

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Notes from the 2010 annual meeting of the American Academy of Orthopaedic Surgeons demonstrate concern over the fact that metal ions can be released into the bloodstreams of metal-on-metal hip replacement patients, and state that the “Size, design, and position of resurfacing cups are critical factors leading to metal ion release,” but warn that “Definitive… Continue Reading

DePuy Pinnacle Hip Solution Guide Fails to Illustrate Risks

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The DePuy Pinnacle Hip Solution Guide provides a great deal of information on different hip replacement systems offered by DePuy Orthopaedics.  As stated by the company, the Pinnacle Hip Replacement system “is designed with a wide range of acetabular cup options, biological and mechanical fixation alternatives and advanced bearing technologies. With more options than any… Continue Reading

2010 – Scientists study how metal ions wear off metal-on-metal hip replacements

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Hip reconstruction procedures have been conducted for quite some time to treat severe hip arthritis, and there is more than one procedure when reconstructing the hip.  A total hip replacement involves removal of the femoral head, whereas a hip resurfacing is simply placing a mushroom shaped cap on top of the femur.  For many years,… Continue Reading

2010 – Complications seen with ASR hip replacements

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When people experience severe hip arthritis there are a few different surgical options, generally categorized as hip replacement.  The two primary types of procedures are resurfacing arthroplasty and total hip replacement.  The difference between the two is that a total hip replacement involves removal of the head of the femur, and replacing it with a… Continue Reading

2010 – Metal Ions from Metal-on-Metal Hip Implants Passed to Fetus

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Hip arthroplasty is a procedure performed on patients suffering from advanced hip arthritis.  For many years hip prosthetics were made using a medical grade plastic known as polyethylene.  This material oftentimes wore down, and required revision surgery to replace the worn out prosthetic.  Thus metal-on-metal bearing surfaces were invented, as these stronger metallic pieces are… Continue Reading

2010 – Study shows high metal ion levels in blood of metal hip replacement patients

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Hip replacement surgeries are often performed on patients suffering from a damaged hip joint.  The hip joint is a ball and socket joint, which can cause some issues when designing prosthetics.  Ball and socket joints include a bearing, which is a relatively delicate system that often wears down over time.  For a long time, the… Continue Reading

2008 – Complications of meta-on-metal hips evaluated

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Different prosthetic designs have been created for people requiring hip replacement procedures.  Each patient has different needs depending on their activity level, and the nature of their hip disorder.  Younger people can still be more active, and thus require a hip prosthetic that can handle the rigors of more physical activity.  Therefore, metal-on-metal prosthetics have… Continue Reading

2.6% Mortality Rate Seen with DePuy Hip Replacement Surgeries

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DePuy is an orthopedics company that manufactures metal-on-metal articulation systems for hip replacement procedures.  Their product offers low wear and high stability in order to reduce instances of revision surgery.  Revision surgery can be very dangerous; statistically there is a 2.6% risk of death for senior citizens undergoing revision surgery. Metal-on-metal bearings for hip replacements… Continue Reading

2001 – Severe Skin Reactions Seen with Metal-on-Metal Hip Replacement Systems

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Metallic prostheses are increasing in popularity, as an option for hip replacement procedures.  One of the issues with previous hip replacement models was the wearing down of the prosthetic.  Previous prosthetics included a metallic head, and a polyethylene socket.  Polyethylene is a medical grade plastic, but was not particularly durable.  Therefore, metal-on-metal prosthetics were invented… Continue Reading