Articles Tagged with Metallosis

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Today I finish my conversation with Physical Therapist Amy Dougherty on specific problems that may arise with metal-on-metal artificial hip failures:

Clay: Over the past ten years you have seen a lot of metal-on-metal hip implants. Several years ago an attempt was made to put a metal-on-metal artificial hip together, and that was supposed to last forever, or last a whole lot longer, and it turned out that it was problematic. And I know you have had many patients who have had that [implant]. What did you see out of the metal-on-metal hip implants when they were failing?

Physical therapist assisting patient after hip replacement surgery.Amy: Again, the first cardinal sign that I saw was chronic pain, an inability to weight bear normally through that joint. So even after normal hip replacement, the patient should be able to weight bear through it. It should not feel like they collapse on that hip, and so a limp that never resolves or an inability to get away from an assistive device. So, I had a patient in her 50s that could not get off a walker. She was 50. She was playing tennis five days a week before she had her hip replaced. Yes, with the metal-on-metal she suffered metallosis and she had an overt failure of that joint replacement. She was a candidate for this new [metal-on-metal implant], now widely known to be a bad device, because she was so young, active, fit, and healthy. It was supposed to last for longer. It was supposed to allow her to have more function larger range of motion, less risk of dislocation and all of those things. So as we know, that did not really work out so well.

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The human hip is a marvel of bioengineering. It allows for a 360-degree range of motion due to its “ball-in-socket” design. But as we age, this hip joint can sometimes fail. When it does, it may require a total hip replacement.

Artificial Hip
Hip replacements often use a variety of exotic metal alloys or ceramics to recreate the ball-in-socket mechanism of the human hip. A total hip replacement will typically consist of four parts:

  • The socket (or acetabular component).
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Orthopedic surgeon discussing revision surgery for recalled artificial hip
I get this question fairly often, and it’s a good one. It usually goes something like this: a person had a total hip replacement several years ago. A few years pass. Then out of the blue the individual receives a letter from the artificial hip manufacturer or from the implanting surgeon explaining that a recall has been issued for the artificial hip components implanted. (And these are the lucky patients; many people who receive an artificial hip that was later recalled never get notification from their doctor, the manufacturer, or anyone. They don’t discover they have a defective artificial hip until the pain, metallosis, or other injury develops.) If I were in this position, and I received a recalled artificial hip, I would want to know: Should I have the recalled hip removed? And should I have the hip removed immediately?

As with most things in life, the answer is not simple.

I have been a product liability lawyer for many years now, and in that time I have spoken with hundreds of people suffering from defective products. I have heard dozens of variations on a similar narrative. While this is neither medical nor legal advice, here are my suggestions:

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Smith & Nephew Birmingham Hip Litigation



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Do you have pain that seems irregular after Hip Surgery? Today’s guest will guide us through the expectations of hip surgery, what it is like to go through the surgery, what rehab is like, and what happens to a person when an artificial hip fails inside the body.

Amy Dougherty a physical therapist on the Outer Banks of North Carolina, is the owner of Outer Banks Physical Therapy. She graduated from the University of North Carolina at Chapel Hill, where Clay also attended college and Law School. Loved by her patients, she is an outstanding Physical Therapist and will explain how hip surgery impacts your body and what happens to the body when hip surgery fails.

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Dr. Tower’s Backstory


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Cobalt poisoning from artificial hip implants

What is Arthroplasty Cobalt Encephalopathy (ACE)?

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Woman waiting for Depuy ASR revision surgery
Behind every metal-on-metal (MoM) artificial hip that fails, there is a person and a story. Artificial hip manufacturers may see only a faceless crowd of victims. These defendant companies may attempt to resolve the claims in bulk and move on to market the next blockbuster medical device. But in that crowd of plaintiffs are thousands of individuals uniquely injured by a product that was implanted in their bodies. The product failure often requires revision surgery, and the injuries that result from the artificial hip failures change lives forever: accomplished tennis players no longer play tennis; couples no longer travel or walk together on a beach; others have to resign from jobs they love because they cannot sit a desk for any length of time. Each of these people has a unique story to tell.

In the next three posts, I will share one woman’s story. “Suzanne” [not her real name] received a metal-on-metal (MoM) artificial hip in 2006 after years of pain from arthritis. The hip was recalled in 2010, and Suzanne was forced to undergo revision surgery in 2011. This is her story:

Part 1

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“What did they know and when did they know it?” When something goes wrong with a medical device, this eventually becomes the key question. Unfortunately for Depuy Orthopaedics (Depuy), a lot has gone wrong with its metal-on-metal (MoM) hip implants over the past ten years. And to make matters worse, recently released documents* show Depuy knew it would have problems with its MoM hip implants decades ago.

Depuy MoM Hip Implants: An Overview

iStock-587512462-1-300x200Hip implants have been around for a long time. They can be made of various materials. Some older models use a polyethylene cup and a metal ball to create the artificial hip joint. While this combination works well, it’s not perfect. Engineers have looked for other materials to find a hip joint that can last longer with fewer adverse effects.

One attempted solution was to have both the cup and ball made out of metal, hence a metal-on-metal hip joint. However, the performance of these hip implants was even worse than joints that used polyethylene and metal. Problems with MoM hip implants included significant pain, bone loss, hip implant failure and metallosis.

As a result of these problems, thousands of lawsuits have sprung up, not just against Depuy, with its ASR and Pinnacle MoM implants, but other MoM hip implant manufacturers such as Biomet and Stryker. Many of the Depuy lawsuits have been consolidated into multi-district litigation, or MDL. A few initial bellwether trials involving the Depuy Pinnacle have resulted in massive verdicts against Depuy, which I wrote about here.

Basically, things have not been looking good for Depuy. And they just got worse.

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Patient with Artificial Hip Failure



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