Mark S. Sanders, MD FACS Special thanks to DePuy

Orthopaedics, Inc.

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Agenda

1. How your knee works & why it hurts

2. Knee replacement basics

3. What patients have to say

4. Your questions

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Thigh bone(femur)

Cartilage

Shin bone(tibia)

Kneecap(patella)

How your knee works

Anatomy of the knee

• Largest joint in body

• Referred to as a hinge joint because it allows the knee to flex & extend; while hinges can only bend and straighten, the knee has the ability to rotate (turn) & translate (glide)

• 3 bones

• Shin bone (tibia)

• Thigh bone (femur)

• Kneecap (patella)

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What’s causing your pain?

It’s estimated 70 million people in the U.S. have some form of arthritis.1 Osteoarthritis is one of the most common types. •Osteoarthritis

• Wear and tear that deteriorates the “cushion” in your joints• A degenerative condition—it won’t get better and may get worse

•Rheumatoid arthritis• An autoimmune disease that attacks the lining

of joints, causing swelling, possibly throbbing painand deformity

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.

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What’s causing your pain?

Healthy knee

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

Assessing your pain

• Does your knee hurt one or more days per week?

• Does the pain interfere with your sleep?

• Is it painful for you to walk more than a block?

• Are pain medications no longer working?

• Is knee pain limiting your participation in activities(e.g. family vacations or other functions)?

• Has inactivity from knee pain caused you to gain weight?

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Little or no pain

Excruciating, debilitating pain

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Assessing your pain

• Rate your pain on a scale of 1 to 5

• For most people, the tipping point is about 4 or 5— that’s when the pain becomes too difficult and they turn to a surgeon for relief1

1. 2007 DePuy Orthopaedics, Inc. Knee Attitudes & Usage Study.

Assessing your painCheck your mobilityIf you have difficulty performing any of the movements below,it may be time to talk to your doctor about next steps

WalkBend at the

hips and kneesPretend to drive:

push the gas/brakePretend to golf:

swing a club

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How can your pain be treated?

• Medications• Analgesics• Corticosteroids

• Injections• Corticosteroids,

hyaluronic acid(e.g., Orthovisc®)

• Water therapy• Soaking, ice packs,

hot packs

• Exercise & physical therapy

• Also good for weight loss

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Knee replacement

• Implants replace damaged surfaces

• Helps relieve pain and restore mobility

• More than 500,000 knee replacements are performed each year in the U.S.1

• A recent Arthritis Foundation® study shows knee replacement has a 90-95% rate of patient satisfaction2

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1. <http://www.aaos.org/Research/stats/Knee%20Facts.pdf>, 2005.2. The Arthritis Foundation. <http://arthitis.org/research/Bulletin/vol5no11/Printable.htm>, 2006.

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Femoral component

Tibial component

What is knee replacement?

A surgical procedure that removes and replaces diseased joint surfaces with implants

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Femoral component

Tibial component

Patellar component

Polyethylene insert

How does it work?

• Diseased areas at top of shin bone (tibia) and bottom of thigh bone (femur) are removed and reshaped

• Femoral component covers the thigh bone (femur)

• Tibial component covers the shin bone (tibia)

• Polyethylene insert placed between femoral and tibial components

• Patellar component replaces the kneecap (patella)

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Healthy knee Knee replacement

How does it work?

DePuy Sigma® Knees

• 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

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Sigma® Fixed-Bearing Knees

• Most widely used type of knee replacement in the U.S. today1

• Designed to enhance stability of the joint

• New designs and advanced materials - Helps reduce wear

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1. IMS Health

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Sigma® Fixed-Bearing Knees

Sigma® Rotating Platform Knees

Rotating Platform Knee

Designed to rotate as it bends, imitating your natural knee movement

• The surfaces of the knee joint roll and glide against each other as you bend. In other words, your knee naturally rotates as it bends

• Designed for patients who want to remain active since it minimizes implant wear, compared to traditional knee replacements1

• A multi-center DePuy Orthopaedics study shows 97% patient satisfaction at 5 years after surgery2

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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.

Should you wait to replace your knee?

Assess your pain and ability to function• Do you feel severe pain in your knee?• Has the pain and loss of function affected your quality of life?• Do you have difficulty sleeping or performing basic functions

(walking, driving, climbing stairs)? • Does medication no longer provide relief?

Consult your physician Early diagnosis and treatment are important1

• Delaying may lower your quality of life2

Osteoarthritis is degenerative—it won’t get better and may get worse

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.

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Information specific to Dr. Sanders’ approach

Preoperative Planning

• Long Standing X-rays (Orthoradiograms)• Medical, Vascular, and Cardiac clearance• Patient Education

Decreasing Postoperative Pain

• Spinal Anesthesia decreases post op pain and thromboembolic disease

• Minimally Traumatic Surgery • Minimal Use of the tourniquet averages 20 minutes • Ranawat cocktail locally injected for post op pain

relief• Rapid Surgery (averages one hour)• Epidural catheter for pain relief x 2 days• Oral analgesics• Cryocuff for cold therapy

Decreasing the Incidence of Thromboembolism

• Immediate Active Motion without CPM machine (average patient’s motion 0-120 degrees by day one)

• Foot pumps placed before surgery to decrease thromboembolic disease

• Ambulation with PT that afternoon TED antiembolism stockings worn for two weeks

• Medications given to prevent clotting• Most patients receive only Aspirin

Decreasing the Infection Rate in the OR

• Preoperative intravenous antibiotics • Antibiotics impregnated in bone cement• Special “Space Suits” worn by all scrubbed

OR personnel

Post Operative Rehabilitation

• Immediate active motion (no CPM machine) averages 0-120º within 24 hours

• Ambulation with PT that same day• Average hospital stay from Tuesday to Friday• Most patients <70 go home• Most patients >80 go to rehab hospital• Average length of time with crutches/walker 10 days• Average time in PT ranges from 4-6 weeks

Wound Management/Infection Prevention

• Patients shower daily with ® Hibiclens starting at 24 hours post surgery

• Compression stockings worn for two weeks• No skin staples• ® Dermabond (medical grade ®Krazyglue)

lasts for ten days• Intracuticular sutures (®Quill) dissolves on its

own without need for suture removal

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Important safety information. . .

• 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

Summary

• 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

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1. Fortin, Paul R., et al. Outcomes of Total Hip and Knee Replacement. Arthritis & Rheumatism 42 (1999): 1722-17282. The Arthritis Foundation. <http://arthitis.org/research/Bulletin/vol5no11/Printable.htm>, 2006.

And Never Forget:

• Inform every doctor or dentist you have a knee replacement to receive antibiotics before invasive procedures

Thank you!

To find out more about knee pain and the treatment options available, visit:

www.kneereplacement.comwww.aaos.org

© DePuy Orthopaedics, Inc., 2010.The third party trademarks used herein are trademarks

of their respective owners.

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