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Mark S. Sanders, MD FACS Special thanks to DePuy Orthopaedics, Inc. 1 Agenda Thigh bone (femur) Kneecap (patella) Cartilage Shin bone (tibia) How your knee works & why it hurts Knee replacement basics What patients have to say Your questions 2 How your knee works
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Anatomy of the knee
1. Landers, S. Another reason to exercise for those with arthritis. American Medical Association website. <http://www.ama-assn.org/amednews/2005/05/02/hlsc0502.htm>, 2005.
It’s estimated 70 million people in the U.S. have some form of arthritis.1 Osteoarthritis is one of the most common types.
The end of each bone in the joint is covered with cartilage, acting as a cushion so the joint functions without pain
Diseased knee (osteoarthritis)
Wear and tear deteriorates natural cushion, leading to bone-on-bone contact, soreness and swelling
Little or no pain
Excruciating, debilitating pain
1. 2007 DePuy Orthopaedics, Inc. Knee Attitudes & Usage Study.
Bend at the
hips and knees
Pretend to drive: push the gas/brake
Pretend to golf: swing a club
Check your mobility
If you have difficulty performing any of the movements below,
it may be time to talk to your doctor about next steps
1. <http://www.aaos.org/Research/stats/Knee%20Facts.pdf>, 2005.
2.The Arthritis Foundation. <http://arthitis.org/research/Bulletin/vol5no11/Printable.htm>, 2006.
A surgical procedure that removes and replaces diseased joint surfaces with implants
Sigma Knees come in a wide range of shapes, sizes and materials
Your surgeon may be able to fit you with a Sigma Knee designed to provide a more natural feel and movement
Sigma Knees can be implanted using minimally invasive surgery
The Sigma Knee is a great example of a proven design that continues to evolve to meet the demands of today’s patients
1. IMS Health
1. McNulty, D. et al. “In Vitro Wear Rates of Fixed-bearing and Rotating Platform Knees (Rev. 2).” 2003.
2. DePuy Multi-Center Study. 2006.
Rotating Platform Knee
Designed to rotate as it bends, imitating your natural knee movement
1. Fortin PR, et al. Outcomes of Total Hip and Knee Replacement. Arthritis & Rheumatism. 1999;42:1722-1728.
2. Fortin PR, et al. Timing of Total Joint Replacement Affects Clinical Outcomes Among Patients With Osteoarthritis of the Hip or Knee. Arthritis & Rheumatism. 2002;46:3327-3330.
As with any medical treatment, individual results may vary
The performance of joint replacements depends on your age, weight, activity level and other factors
There are potential risks, and recovery takes time
People with conditions limiting rehabilitation should not have this surgery
Only an Orthopaedic surgeon can tell if knee replacement is right for you
1. Fortin, Paul R., et al. Outcomes of Total Hip and Knee Replacement. Arthritis & Rheumatism 42 (1999): 1722-1728
2. The Arthritis Foundation. <http://arthitis.org/research/Bulletin/vol5no11/Printable.htm>, 2006.
The leading cause of knee pain is osteoarthritis
Osteoarthritis is degenerative – it won’t get better and may get worse
Early diagnosis and treatment for total knee replacement are important1
A recent Arthritis Foundation® study shows knee replacement has a 90-95% rate of patient satisfaction2
Sigma Knees come in a wide range of shapes, sizes and materials, so your surgeon may be able to fit you with a knee designed to provide a more natural feel and movement
To find out more about knee pain and the treatment options available, visit:
© DePuy Orthopaedics, Inc., 2010.
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