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Technology in Knee Replacement
Imagine dancing, playing a round of golf, or just moving about freely. Thanks to Sigma Knees, more than a million people are experiencing these simple pleasures again.1 Sigma® Knees from DePuy Orthopaedics, Inc. come in a wide range of sizes, shapes, and materials. Your surgeon can fit you with the knee designed to provide a more natural feel and movement so you can get back to doing the things you love.
Two types of clinically proven Sigma Knees—Rotating Platform and Fixed-Bearing—are available from DePuy Orthopaedics to help restore mobility and reduce pain. Your surgeon will choose the best option for you based on your age, weight, activity level, and other specific needs.
See how the knee that bends and rotates may help you regain more normal movement. |
SIGMA ROTATING PLATFORM KNEESAsk for the knee that bends and rotatesMany people think that their knee is simply a hinge that only bends and extends. However, your natural knee rotates while it bends. Sigma Rotating Platform Knees are designed to accommodate more normal movement of the knee. This allows the knee to slightly rotate while it flexes and extends, accommodating your body's normal need for rotation. Sigma Rotating Platform Knees are designed to accommodate the stress placed on the joint when the knee rotates, therefore helping to increase the implant's longevity. In fact, Rotating Platform Knees have been proven to reduce implant wear by 94% over traditional knee implants.2
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SIGMA FIXED-BEARING KNEES
Sigma Fixed-Bearing Knees are the most widely used knee replacements. The design of the Sigma Fixed-Bearing Knee provides stability of the knee replacement and distributes pressure evenly throughout the joint, which helps reduce wear.
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Learn more about Fixed-Bearing Knees |
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Next: Understanding Knee Implant Options |
References:
1. Data on file at DePuy Orthopaedics, Inc., 2007.
2. McNulty, D. et al. "The Effect of Crosslinking UHMWPE on In Vitro Wear Rates of Fixed and Mobile Bearing Knees." ASTM STP 1445. Gsell, R. et al. American Society of Testing and Materials, West Conshohocken, PA., 2004.