About Knee Replacement
Trust the Experts: Talk to Your Doctor
Whether you are considering knee replacement surgery or have a replacement, the best available source of information is an experienced orthopaedic surgeon. Only an orthopaedic surgeon can help you understand all of the benefits and risks of surgery and help you decide which knee is best for you, taking into consideration your age, weight and lifestyle activities among other factors. A qualified orthopaedic surgeon can also help you understand the clinical data that describes the performance of various devices.
To find an orthopaedic surgeon who uses Zimmer products, call 1-800-HIP-KNEE (1-800-447-5633) or click here.
Total Knee Replacement
Knee replacement surgery is among the most successful and proven interventions in modern medicine. A National Institutes of Health (NIH) study concluded that total knee replacement is extremely successful, resulting in “rapid and substantial improvement in the patient’s pain, functional status, and overall health-related quality of life” in 9 out of 10 patients.” More than 600,000 people a year undergo the procedure in the United States alone.
A total knee replacement is usually considered when the bone surfaces on both sides of the knee, as well as the underside of the kneecap (patella), are significantly damaged. In total knee replacement surgery, the surface of the end of the thighbone (femur) is replaced with a contoured metal component designed to fit the curve of your bone. The surface of the top of the shinbone (tibia) is typically replaced with a flat metal component and a smooth plastic component that serves as a replacement for the cartilage. The undersurface of the kneecap also may be replaced with an implant made of high tech plastic, or a combination of metal and plastic. For more information and FAQs about total knee replacement, visit our Frequently Asked Questions page.
Partial Knee Replacement
If you are diagnosed with unicompartmental osteoarthritis – meaning that you only have damage in one area of your knee – your doctor may consider a procedure that removes the diseased portion of your knee while preserving the healthy side. This is called a unicompartmental knee replacement – or a partial knee replacement. A successful unicompartmental knee replacement can relieve pain and preserve more of your natural anatomy than a total knee replacement. Although surgery is daunting, your arthritis and knee pain is likely to worsen with time. Many patients who have undergone the procedure just wish they would have done it sooner. A partial knee replacement may delay, and, in some cases, prevent a more extensive total knee replacement. For more information about knee replacement procedures, visit our Considering Surgery page.
Zimmer® NexGen® System
More than three million NexGen Knees have been implanted worldwide, with more than 1.75 million implanted in the United States, making NexGen the most clinically proven knee system in the world. The NexGen family of products includes a wide range of solutions designed to address the unique needs of each patient. From the Zimmer Gender Solutions NexGen High-Flex Knee Implant, which address the important differences between women’s and men’s knees, to the NexGen LPS-Flex Mobile Bearing System and NexGenLPS and CR-Flex Fixed Bearing Knees, Zimmer provides surgeons with the knee systems and implant combinations to find a replacement that is right for you.
Most importantly, the Zimmer NexGen Knee System consistently demonstrates among the best clinical performance across the world. That’s why more surgeons trust Zimmer NexGen Knee replacements for their patients, every day, than any other knee system. With NexGen, you can be confident you are receiving the world’s best performing knee implants. To learn more about the NexGen System, visit our Zimmer NexGen Knee Replacement System page.
Zimmer® Unicompartmental High Flex Knee System
The Zimmer Unicompartmental (Uni) High Flex Knee surgery preserves more bone than a total knee replacement. It can be done through a smaller incision, providing the potential for a faster recovery with less pain and a more natural feeling knee. The Zimmer Uni safely accommodates high flexion and is designed to feel more natural throughout your full range of motion. In clinical studies, unicompartmental knee replacements from Zimmer have a 98% success rate at 13 years1, which is one of the highest success rates seen in unicompartmental knees to date. To learn more about minimally invasive partial knee replacement, visit our Minimally Invasive Partial Knee Replacement page.
Zimmer® Patient Specific Instruments
Zimmer Patient Specific Instruments are approved for use with both the NexGen total knee replacement system and the Zimmer Unicompartmental knee replacement system. Patient specific instruments allow orthopaedic surgeons to create customized surgical guides tailored to each patient’s unique anatomy based on an MRI scan of the patient’s knee – supporting the surgeon to ensure proper placement and alignment of the implant. Find out more at Zimmer Patient Specific Instruments.
1. Berger, et al. The progression of patella femoral arthrosis after Medial Unicompartmental Replacement. CORR 2004.