Hip Replacement Lawsuit: Metal-on-Metal Implant Claims

Certain hip replacement devices — particularly metal-on-metal designs sold widely between roughly 2005 and 2013 — have a well-documented history of premature failure, metal debris reactions, and revision surgery. This guide explains what made those devices legally "defective" and how someone with a failed hip implant evaluates a potential claim today.

What Makes a Hip Implant "Defective"?

A hip implant is a medical device, and like any other product, it can become the basis of a legal claim under one of the same three defect categories that apply to defective product claims generally: a manufacturing defect, a design defect, or a failure to warn.

A manufacturing defect means a particular implant, or batch of implants, was produced out of specification — a metallurgical flaw or contamination during assembly — even though the design was sound. A design defect means the blueprint itself was unreasonably dangerous when weighed against its benefit, regardless of manufacturing quality; much of the metal-on-metal litigation below centers on this theory, alleging that a ball-and-socket design using cobalt-chromium alloy on both surfaces was inherently prone to excess metal wear. A failure to warn claim alleges the manufacturer knew, or should have known, about a risk — such as elevated failure rates or metal ion release — and did not adequately disclose it to surgeons or patients.

Most hip implant lawsuits combine more than one theory, alleging both a wear-prone design and that the company kept marketing the device after early adverse-event reports without updating its warnings.

The Metal-on-Metal Problem: Metallosis and Metal Ion Exposure

Traditional hip implants pair a metal ball with a plastic (polyethylene) or ceramic socket liner. Starting in the mid-2000s, several manufacturers marketed "metal-on-metal" designs — a cobalt-chromium ball articulating directly against a cobalt-chromium cup — on the premise that the harder surface would wear more slowly and last longer, particularly in younger, more active patients.

In practice, metal-on-metal joints did not perform as promised for a meaningful share of recipients. As the ball and cup move against each other, they shed microscopic metal particles and ions into surrounding tissue and the bloodstream. In some patients this friction and corrosion — often worsened by design factors like cup angle, component size, or modular neck junctions — produced a local tissue reaction now generally referred to as metallosis: inflammation, tissue death, and pseudotumor formation caused by an accumulation of metal debris.

Beyond the local reaction, cobalt and chromium ions can enter the bloodstream at elevated levels. Reported symptoms have included joint pain, swelling, and popping or grinding at the implant site, as well as, in some documented cases, systemic effects such as neurological changes, cardiac issues, and thyroid dysfunction attributed to cobalt toxicity. The clinical significance of a given blood metal ion level is something only a treating physician can assess, but persistently elevated levels combined with implant loosening are among the reasons surgeons order revision surgery — removing and replacing the failed device.

Revision surgery is itself a significant injury for legal purposes: a second major operation with its own risks, generally a longer recovery than a first hip replacement, that does not always fully resolve pain or restore function. Revision surgery, or a metallosis diagnosis requiring monitoring or intervention, is the injury at the center of nearly every metal-on-metal hip implant claim.

Device Lines and Manufacturers With Documented Litigation

Several metal-on-metal hip implant lines were the subject of manufacturer recalls, FDA safety actions, and product liability litigation during the 2010s. Much of it has since concluded through settlement programs, though the history remains useful for understanding how these claims are evaluated. This summary reflects publicly reported recall and litigation information; it is not exhaustive, and it does not mean every claim involving these devices has been resolved for every patient.

DePuy Orthopaedics (Johnson & Johnson) — ASR and Pinnacle

DePuy recalled its ASR XL Acetabular System and ASR Hip Resurfacing System in August 2010 after data showed a higher-than-expected early failure rate requiring revision. Thousands of ASR lawsuits were consolidated in federal MDL and resolved through settlement agreements. DePuy's separate Pinnacle system, which offered a metal-on-metal bearing option, was the subject of its own federal MDL, including several bellwether trials, before large batches of Pinnacle claims were also resolved through settlement.

Stryker — Rejuvenate, ABG II, and LFIT V40

Stryker recalled its Rejuvenate and ABG II modular-neck hip stems in 2012 after reports of corrosion at the modular junction releasing metal debris. That litigation was largely resolved through master settlement agreements. Separately, Stryker's LFIT V40 cobalt-chromium femoral heads were the subject of a 2016 field safety notice after reports of taper lock failure, leading to a distinct federal MDL that has also seen substantial settlement activity.

Wright Medical, Zimmer, Smith & Nephew, and Biomet

Wright Medical's Conserve metal-on-metal system was the subject of federal MDL and coordinated state proceedings, largely resolved through 2016–2017 settlement agreements, after which the MDL closed to new filings. Zimmer suspended sales of its Durom Cup in 2008 after reports of high early revision rates and later established a claims resolution program. Smith & Nephew recalled the metal liner of its R3 Acetabular System in 2012; its related Birmingham Hip Resurfacing litigation has been reported as substantially resolved. Biomet's M2a Magnum system was likewise the subject of federal MDL litigation resolved through settlement negotiations.

Because settlement programs and case timelines change, this page does not state the current docket status, case count, or settlement value of any manufacturer's program. An attorney who handles current hip implant claims can confirm whether a program remains open for your circumstances.

The FDA's Role: Clearance, Surveillance, and Recalls

Most metal-on-metal hip implants reached the market through the FDA's 510(k) clearance pathway, which allows a manufacturer to market a device by showing it is "substantially equivalent" to a device already on the market, rather than through the more rigorous premarket approval (PMA) process requiring original clinical trial data. Critics of the pathway have long argued it let metal-on-metal designs reach widespread use without the long-term data that later revealed their failure rates.

As problems accumulated, the FDA took a series of regulatory steps, including a 2011 order requiring manufacturers of metal-on-metal total hip systems to conduct mandatory post-market ("522") surveillance studies. The agency has also published ongoing safety communications and physician guidance addressing metal ion testing, soft tissue imaging, and monitoring of symptomatic patients. Individual device recalls — including the DePuy ASR, Zimmer Durom Cup, and Smith & Nephew R3 systems — were tracked through the FDA's medical device recall database.

An FDA recall or safety communication is not itself a lawsuit and does not automatically entitle a patient to compensation, but it is often introduced as evidence in litigation because it documents that a regulator or manufacturer identified a safety signal.

How Hip Implant Claims Are Organized: MDL vs. Individual Suit

When many people are harmed by the same device, their cases are often coordinated through federal Multidistrict Litigation (MDL) — the same structure used across mass torts generally. An MDL consolidates pretrial matters like discovery before a single judge but does not merge the underlying cases into one lawsuit; each plaintiff has an individual case valued on its own injury and damages, unlike a class action, where a single outcome applies across an entire class.

Most of the metal-on-metal hip MDLs described above moved through bellwether trials or negotiated settlement frameworks and, for the large majority of claimants, resolved. That does not mean the door is closed for every patient — someone diagnosed more recently, or who had revision surgery more recently, may still be evaluated for an individual claim depending on the device, filing state, and applicable deadlines.

Who May Have a Claim

Whether someone has a viable hip implant claim depends on specific facts that only a review of medical and device records can establish. Attorneys evaluating these cases generally look at criteria along these lines — this describes the kind of profile attorneys assess, not a guarantee that any individual meets it.

Device Factors

The starting point is confirming the exact device implanted — manufacturer, product line, and model or lot number — since litigation and settlement programs are specific to particular device lines. A metal-on-metal bearing surface, or a modular component known to release metal debris at a junction, generally distinguishes a potential claim from a routine hip replacement.

Diagnosis Factors

A documented complication is typically required: elevated cobalt or chromium blood levels, imaging showing a pseudotumor or soft tissue mass, a metallosis diagnosis, implant loosening confirmed by X-ray, or — most significantly — revision surgery. Pain or dissatisfaction with an implant alone, without objective medical findings, is generally not sufficient.

Timing Factors

Because much of this litigation involves settlement programs with specific enrollment windows, when a patient was implanted, when symptoms were diagnosed, and when revision surgery occurred can all affect whether a claim can be brought, as discussed below. No one should assume from these general criteria that they do or do not have a claim. Our eligibility check tool can help organize the relevant facts before speaking with an attorney.

Evidence to Gather

Hip implant claims are document-intensive. Gathering the following records early makes an initial attorney consultation far more productive.

Implant device card and operative report. Most patients receive a device card at surgery listing the manufacturer, product name, and model or lot number. If you no longer have it, the hospital's original operative report typically records the same information, along with the manufacturer's implant sticker placed in the surgical chart.

Surgical and complication records. Records from the original surgery establish a baseline; records showing the complication — blood metal ion results, MRI or ultrasound imaging, and physician notes documenting pain, instability, or loosening over time — establish the injury.

Revision surgery records, if applicable. The operative report, which often describes the surgeon's direct observations of metal staining, tissue necrosis, or component wear, is typically the single most important document in the case. Pathology reports on removed tissue can also matter.

Financial and employment records. Medical bills, insurance statements, and records of missed work help document the financial impact of a failed implant and any revision surgery.

Statute of Limitations

Every state sets a deadline, called a statute of limitations, for filing a personal injury or product liability lawsuit, and these deadlines vary considerably by state — commonly falling somewhere in a two-to-four-year range, though the exact period and how it is calculated differs by jurisdiction. Because these deadlines vary and interact with other rules, this page does not state a specific number of years that applies to you; an attorney licensed in the relevant state can confirm the actual deadline for a particular claim.

Many states apply a discovery rule in device injury cases, meaning the clock does not necessarily start on the date of the original implant surgery. Instead, it may begin when the patient knew, or reasonably should have known, that the implant — rather than some other cause — was responsible for their symptoms: often the date of a metallosis diagnosis, an abnormal metal ion result, or the revision surgery itself. Because hip implants can function acceptably for years before failing, the discovery rule is frequently central to these cases.

Separately, some states impose a statute of repose, which can bar a claim after a fixed number of years from the date the product was sold or implanted, regardless of when the injury was discovered — and it can operate independently of, and sometimes more strictly than, the discovery rule. Because these deadlines are state-specific and unforgiving, anyone considering a claim should not wait to consult an attorney.

Next Steps

If you received a metal-on-metal or metal-containing hip implant and have since been diagnosed with metallosis, elevated metal ion levels, implant loosening, or have undergone revision surgery, gather the records described above and have them reviewed by an attorney who handles hip implant or medical device litigation. Most attorneys who evaluate these cases offer a free consultation and work on contingency — no fee unless you recover compensation. Before signing any release or accepting any payment related to your implant, have it reviewed by independent counsel first.

See our overview on how to file a lawsuit for a walkthrough of the process, and our mass torts hub for how hip implant claims relate to other device and drug litigation.

Frequently Asked Questions

What is metallosis and how is it diagnosed?

Metallosis is a buildup of metal debris in tissue surrounding a metal-on-metal hip implant, caused by the ball and cup wearing against each other. It can cause local inflammation, tissue damage, and pseudotumor formation. Doctors typically diagnose it through blood tests for cobalt and chromium ion levels, MRI or ultrasound imaging, and, in confirmed cases, direct observation during revision surgery.

Do I automatically have a lawsuit if my hip implant was recalled?

No. A recall is evidence that a manufacturer or the FDA identified a safety problem, but it does not by itself create a right to compensation. You generally need to show the recalled device caused you a specific injury and that your claim is filed within your state's deadline.

Is my case a mass tort or a class action?

Most hip implant litigation has been organized as mass tort multidistrict litigation rather than a class action. In an MDL, each plaintiff files an individual case valued on its own facts, even though pretrial proceedings are coordinated — unlike a class action, which resolves everyone's claims together under a single formula.

Are the DePuy, Stryker, Wright Medical, Zimmer, and Smith & Nephew hip lawsuits still open?

The large federal litigations involving these companies' earlier metal-on-metal and modular-neck devices have substantially resolved through settlement programs, and several associated MDLs have closed to new filings. That history does not automatically apply to every patient — someone with a more recent diagnosis or revision surgery involving one of these device lines should still have an attorney confirm current status.

What if I don't know the exact model of my hip implant?

Your surgeon's operative report and hospital records almost always identify the manufacturer and model, even without a device card. Requesting your complete surgical records from the hospital is usually the fastest way to confirm this.

How long do I have to file a hip implant lawsuit?

It depends on your state, and this page cannot state a specific deadline. Most states use a discovery rule for device injury cases, meaning the clock often starts when you learned your implant caused your symptoms — frequently the date of a metallosis diagnosis or revision surgery, not the original surgery date. Some states also apply a statute of repose. Speak with an attorney promptly to determine your actual deadline.

Can I still file a claim if I already had revision surgery years ago?

Possibly, depending on your state's statute of limitations, discovery rule, and whether a relevant settlement program is still accepting claims. An attorney can review your dates and determine whether you remain within an eligible window.

What compensation might a hip implant claim cover?

Depending on the facts, hip implant claims have sought compensation for medical expenses tied to revision surgery and ongoing treatment, lost income, and pain and suffering. No specific amount or outcome can be predicted for any individual claim.