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Arthritis: A leading cause of knee pain

If you are experiencing knee pain, you’re not alone, more than 50 million Americans suffer from arthritis1, and more than 650,000 knee replacements are performed each year in the U.S.2

Arthritis is one of the leading causes of knee pain and loss of mobility. There are over 100 different types of arthritis and related conditions.


One of the most common types of arthritis is Osteoarthritis (OA), a degenerative joint disease which affects approximately 27 million Americans. OA is most common in people older than 65; however, it occurs in people of all ages. Some risk factors include increasing age, gender, overuse of the joint, obesity, previous injuries and genes. Unlike some other forms of arthritis, OA affects only joints and not internal organs. It can affect any joint in your body, but it occurs more often in knee and hip joints. OA is caused by the wearing away of your joint’s cartilage lining. When the cartilage goes, the three bones rub against each other, which can lead to pain and swelling.3

Patients with knee OA are commonly bow-legged (have a “varus” alignment of their knee), which occurs when there is a loss of joint space – deterioration of cartilage – on the inner part (medial compartment) of their knee. When the loss of joint space occurs on the outer part (lateral compartment) of the knee, it results in a “valgus” deformity, commonly referred to as “knock-knee.”4

When your surgeon corrects these problems, careful attention must be paid to the stretched or shortened ligaments. If the ligaments are not adjusted appropriately to your new artificial joint, you may continue to have an unstable and painful knee.  VERASENSE assists your surgeon with balancing the ligaments and implant positioning during total knee replacement surgery.

Rheumatoid Arthritis

Aching joints are a common symptom of arthritis. Rheumatoid Arthritis (RA) occurs when the lining of the joint swells. This swelling produces chemical substances that attack and destroy the joint surface. This joint effect is symmetrical, meaning that if one knee is affected, usually the other one is too.

About 1.5 million people in the United States have Rheumatoid Arthritis. However, the good news is that RA in the knee can be treated. For certain people, non-surgical treatments like walking aids, simple lifestyle changes, and pills can help with inflammation and pain. People with permanent knee damage that limits daily activity, replacement surgery might be the only long term solution.5



  1. Centers for Disease Control and Prevention Website, https://www.cdc.gov/arthritis/data_statistics/arthritis-related-stats.htm
  2. Kurtz SM, Ong KL, Lau E, Bozic KJ. Impact of the economic downturn on total joint replacement demand in the United States. J Bone Joint Surg Am. 2014 Apr 16;96(8):624-30.
  3. Arthritis Foundation Website, https://www.arthritis.org/about-arthritis/types/osteoarthritis/what-is-osteoarthritis.php
  4. T Derek, V Cooke, Allan Scudamore, and William Greer. Varus knee osteoarthritis: whence the varus? J Rheumatol 2003;30;2521-2523.
  5. Arthritis Foundation Website, https://www.arthritis.org/about-arthritis/types/rheumatoid-arthritis/what-is-rheumatoid-arthritis.php