Types of DePuy Knee Implants and Devices


DePuy Sythnes, a subsidiary of Johnson & Johnson, markets and distributes several different types of knee replacement system to surgeons and patients in the United States.

DePuy knee implants, including the PFC Sigma, LCS Complete and LPS product lines all feature interchangeable components for surgeons to choose from. Because the anatomy of patients can differ widely from one case to the next, there are several sizes and models produced to try to fit each patient’s needs. The brand and design of an implant chosen by an operating surgeon may depend on factors that include a patient’s particular knee problem, age, weight, activity levels, general health, the cost and the safety record of knee devices available.

Knee replacement operations can improve the quality of life for thousands of Americans each year, though at the same time, defective and failing devices on the market can cause irreparable damage to some patients, possibly causing injuries and immense pain and suffering for months or years.
Just as other medical device companies have distributed harmful products in the past, DePuy Orthopedics has been hit with several recalls and recent  complaints involving its PFC Sigma, LCS Complete and LPS knee replacement systems.

Joe Lyon is a highly-rated Cincinnati recall lawyer and Ohio product liability attorney representing plaintiffs nationwide in a wide variety of defective medical device and civil litigation claims.


Different Kinds of DePuy Knee Implants

Fixed Bearing Knees—now the most popular type of knee implant in the U.S. These devices have a structural component in the artificial knee that supports friction and weight, and which remains in a fixed position.

Rotating Platform Knees—designed to provide more natural movement. The structural bearing can rotate in the same way as the original knee. Rotating knees models are designed to reduce stress and wear on the implant components.

High-Flexion Knees—DePuy’s high flexion technology allows the implant to bend well beyond the range of traditional knee implants. According to DePuy, high knee flexion movement occurs when a person kneels, squats or crosses their legs.

Total Knee Replacements—total knee replacement surgeries involve several implant components to restore function of a severely damaged knee. Surgeons resurface the bones of the femur and the tibia, then attach plastic, ceramic or metal implants. DePuy markets several total knee replacement systems.

Partial Knee Replacements—Surgeons perform partial knee replacement surgery when only one or two parts of the knee are diseased or damaged. Partial knee replacement surgery allows patients to retain more of their original knee.


Implant Fixation a Crucial Issue in Failing Devices

There a few different types of fixation used to connect knee implant components to the bone. When an implant loosens, as some reports indicate involving the knee system, a patient will require revision surgery.

  • Cemented Fixation—Implants are commonly held in place with fast-curing bone cement.
  • Cementless Fixation—Implants may be “press-fit” onto bone, which relies on new bone growing into the surface of the implant. These implants are textured or coated so new bone can grow into the surface of the implant.
  • Hybrid Fixation—In hybrid fixation, the femoral component of an implant is inserted without cement, and the tibial and patellar components are inserted with cement.

DePuy Sythnes Implant Technology

DePuy’s most popular knee replacement products include the Sigma Total Knee System and LCS Knee System. DePuy has developed more than a dozen knee systems, including high-flexion devices that provide a greater range of motion than standard knee implants.

DePuy knee implants are manufactured by DePuy Orthopaedics, part of the DePuy Synthes family of companies, owned by Johnson & Johnson. There have been recalls, regular complaints, and lawsuits filed against the medical device company due to personal injuries, lack of testing, and lack of warning about the potential risks of receiving a knee implant.


Legal Representation for Victims of Faulty DePuy Knee Implants

Medical Malpractice Lawyer & Medical Error Attorney DePuy Knee Implants

If you or a loved one has suffered an injury due to a failing knee implant or a defective DePuy product, and have questions about the legal remedies available to improve quality of life and medical care in Ohio, contact The Lyon Firm (800) 513-2403. You will speak directly with Mr. Lyon, and he will help you answer these critical questions.