More than 700,000 knee replacement surgeries are performed in the United States every year, making it one of the most common orthopedic procedures in the country. For the vast majority of patients, the outcome is improved mobility and relief from chronic pain. But when a device is defective — poorly designed, improperly manufactured, or inadequately tested — the consequences can be severe: premature failure, excruciating pain, infection, and the need for a complex and risky revision surgery. For those patients, a product liability lawsuit may be the only path to financial recovery.
What Is a Faulty Knee Replacement?
A faulty or defective knee replacement is an implant that fails to perform as intended. Common failure modes include premature loosening of components, excessive wear of polyethylene inserts, instability, bone damage, infection, and complete device failure requiring removal and replacement. When these failures stem from a manufacturing defect, a design flaw, or a failure to warn patients and surgeons of known risks, the manufacturer can be held liable under product liability law.
Major manufacturers including Zimmer Biomet, DePuy Synthes, Exactech, Smith & Nephew, and Stryker have all faced significant litigation over recalled or defective knee devices in recent years.
What Is the Average Settlement?
Faulty knee replacement settlements vary widely depending on the manufacturer, the nature of the defect, and the severity of the patient’s injuries. Based on current litigation data:
- Most faulty knee replacement settlements range from $50,000 to $300,000, depending on whether revision surgery was required and the extent of long-term harm.
- Cases involving serious complications, permanent disability, or multiple revision surgeries regularly exceed $300,000 to $500,000.
- The most significant historical benchmark is the 2002 Sulzer Medica settlement — approximately $1 billion to resolve nearly 4,000 lawsuits, averaging roughly $200,000 per patient — for implants contaminated with lubricant residue that prevented proper bone bonding.
- In the active Exactech MDL litigation, attorneys estimate individual settlements in the range of $100,000 to $300,000, though no court-approved settlements have been finalized due to ongoing bankruptcy proceedings.
- For context, the analogous DePuy ASR hip implant litigation — a similar defective orthopedic device case — produced a global settlement of over $2.5 billion, averaging approximately $250,000 per claimant, providing a useful benchmark for how mass device litigation of this scale tends to resolve.
Major Active and Recent Knee Replacement Litigations
Exactech Optetrak Recall Exactech recalled nearly 200,000 knee, hip, and ankle devices after defective packaging caused the polyethylene components to oxidize and wear prematurely. As of mid-2026, over 1,800 cases are pending in multidistrict litigation in the Eastern District of New York, with proceedings currently stayed due to Exactech’s bankruptcy filing. The company has estimated assets between $100 and $500 million to fund eventual payouts.
Zimmer Biomet NexGen System Zimmer Biomet has faced more than 1,700 lawsuits over its NexGen implant, with plaintiffs claiming the tibial component loosens prematurely, forcing painful revision surgeries. Zimmer previously set aside over $300 million to resolve claims related to other defective devices, signaling the scale of financial exposure these manufacturers face.
DePuy Attune Knee The DePuy Attune knee system has been reported to have a five-year failure rate of nearly 68%, generating ongoing investigations and lawsuits from patients who experienced premature loosening and required revision surgery far sooner than expected.
Key Factors That Determine Settlement Value
Whether Revision Surgery Was Required Revision surgery — replacing a failed implant — is the single most powerful driver of settlement value. It involves a second major operation with its own risks, a lengthy and painful recovery, and often permanent changes to bone structure. Cases requiring one or more revisions consistently settle for more than cases where the defect caused pain and complications but not surgical intervention.
Severity and Permanence of Injury Permanent mobility limitations, chronic pain, nerve damage, or the inability to return to work significantly increase claim value. Medical documentation of ongoing functional impairment is critical to establishing these damages.
Medical Expenses All costs related to the device failure — additional hospitalization, revision surgery, rehabilitation, medications, assistive devices, and future care — are compensable and directly shape the settlement amount.
Lost Wages and Earning Capacity Time missed from work during recovery and any long-term reduction in a patient’s ability to work are recoverable. Younger, higher-earning plaintiffs with significant career disruption tend to receive larger settlements.
Evidence of Manufacturer Knowledge When evidence shows the manufacturer knew about the defect and failed to act — or rushed a product to market without adequate testing — punitive damages may be available. This is a powerful leverage point in settlement negotiations.
Multidistrict Litigation vs. Individual Lawsuit When cases are consolidated into an MDL, individual settlements are often determined through a matrix that assigns values based on injury severity, revision surgery, and other factors. While this produces consistency, plaintiffs with the most serious injuries may obtain more through independent negotiation or trial.
Frequently Asked Questions (FAQs)
Q: How do I know if my knee replacement is defective?
A: Signs of a defective implant include persistent or worsening pain after the expected recovery period, swelling, instability, clicking or grinding sensations, and your surgeon recommending revision surgery sooner than anticipated. If your device has been recalled, you may have a claim regardless of current symptoms.
Q: How long do I have to file a lawsuit?
A: Product liability statutes of limitations vary by state, typically running two to four years from the date of injury — or from when you discovered, or should have discovered, the defect. The “discovery rule” is important here: if your device failed years after implantation, your filing window may start from when your doctor confirmed the failure, not the original surgery date.
Q: Can I file a claim if my device hasn’t been recalled?
A: Yes. A formal recall strengthens a case but is not required. If your implant failed prematurely due to a design or manufacturing defect and caused you harm, a product liability claim may still be viable.
Q: Do I need a lawyer?
A: Yes. Faulty knee replacement cases involve complex product liability law, large corporate defendants with experienced legal teams, and often multidistrict litigation procedures. Most product liability attorneys work on contingency — no upfront fees — and are essential to navigating these cases effectively.
Q: Are faulty knee replacement settlements taxable?
A: Compensation for physical injuries and medical expenses is generally not taxable under federal law. Portions allocated to lost wages or punitive damages may have different tax treatment. Consult a tax professional for guidance specific to your settlement.
