OAdjuster Osteoarthritis Knee Brace


Attention Medicare Patients

Provides the ability to control the desired amount of load as needed.
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Is the OAdjuster Osteoarthritis Brace right for me?

Ideal for moderate to severe ligament instabilities and post-knee surgery. Try our Brace Advisor for personalized product recommendations to meet your needs!

Revolutionary "Progressive Loading System" for Relief!

Designed for moderate to severe, unicompartmental Osteoarthritis. The OAdjuster is recommended for ligament instabilities and post-operative rehabilitation.

Features and Benefits:

  • Light weight - 21 oz
  • Sleek profile
  • Integrated daily load adjustment
  • Patient adjustment key
  • 20° of varus or valgus range
  • New Bi-axial hinge technology
  • 4-point dynamic leverage system
  • Arthritis friendly features
  • Commended for Ease-of-Use by the Arthritis Foundation

The OAdjuster offers "Progressive Loading System", providing an integrated patient-controlled load adjustment. The Bi-Axial hinge allows for a double upright design to contour to the leg and fit comfortable, without migration. The Load Sensor, a DonJoy exclusive, helps to determine the forces being applied by the brace.

Medial or Lateral refers to the affected compartment.

What is Osteoarthritis (OA)?

Arthritis refers to more than 100 diseases that affect the joints and their surrounding tissues. Osteoarthritis, or OA, is the most common form of arthritis. The statistics on OA are staggering:

  • Nearly 21 million people in the United States have OA*
  • The incidence of OA is expected to increase even more as the U.S. population ages*
  • Over 7 million Americans are limited in their ability to participate in their main daily activities because of their arthritis*

The joint most often affected by osteoarthritis is the knee. Knee OA is caused by the degeneration or breakdown of articular cartilage that covers the ends of the bones that meet at the joint. Cartilage serves as a cushion between the bones, providing a smooth surface for the bones to move against each other. When the cartilage deteriorates the bones may actually be rubbing together. Your physician will often refer to this as “bone-on-bone” osteoarthritis.

*Arthritis Foundation

What is Osteoarthritis (OA) knee bracing and how does it work?

Knee braces are available that are specifically designed to support a knee affected by OA. They stabilize the joint, help reduce pain which allows patients to return to the activities they love. Load redistribution and joint alignment Through a process called “off-loading” or shifting, OA braces help relieve pain by redistributing the weight bearing load on the painful or affected compartment of the joint to the healthy or unaffected compartment.

What to expect from a Osteoarthritis (OA) knee brace

  • Braces cannot cure OA and may not be right for everyone. However, it is a viable solution for many people. The ideal candidates are typically active people who are motivated to strengthen their muscles and willing to wear a brace to realize the benefits of this form of treatment.
  • Discuss treatment goals with your doctor and others on your health care team before you get a brace.
  • Don’t expect a brace to feel good from the start. It may take from a week to a month to get used to how the brace feels on your leg. Be patient. It took a long time for your knee OA to develop.
  • Bracing has come close to eliminating pain for some people with knee OA, while others experience moderate relief.

*** NOTE: This item can take up to 2 weeks to ship ***

Replacement Parts

For replacement kits and straps, visit the OAdjuster replacement parts category.

Shop our complete selection of knee braces or browse additional DonJoy products.

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Product Questions

Will I be able to ride a motorcycle ?
Question by: Alfred Kaiser on Sep 13, 2010, 9:16 AM
Hello Alfred,

The DonJoy OAdjuster Osteoarthritis Knee Brace should not prevent you from your normal activities.
Answer by: Admin on Sep 13, 2010, 9:16 AM
will it harm the brace wear at the beach in the sand
Question by: Joyner on Oct 27, 2010, 9:46 AM

If you do take your brace to the breach, you must be wary of sand entering the hinge.

After each immersion in salt water, rinse the brace in freshwater.

To wash the liners, hand wash in mild detergent and let air dry.
Answer by: Admin on Oct 27, 2010, 9:46 AM
removed straps and washed them now dont rember how they go on were do i get instruction to put them back on right
Question by: larry goerzen on Nov 18, 2010, 5:58 PM
Hello Larry,

The product instructions do not indicate how to put the straps back on, but if you give us a call, we'll be happy to grab a product specialist to walk you through it.
Answer by: Admin on Nov 18, 2010, 5:58 PM
I have osteoarthritis in both knees and a probable torn meniscus (even with an x-ray, the radiologist and Orthopedic surgeon couldn't tell!), but it was a painful injury and is healing. Even before the injury, I had osteoarthritis, due to various skiing, cycling injuries, and my age (60) The doctor is recommending eventual knee replacement but I want to avoid that by losing weight and using a brace, as well as getting hyuralonic acid injections, which the Dr. is willing to do.

It will take me a long time to lose the weight I have, given my mobility, but I must try. What sort of brace will take the most pressure off my knees AND provide patellar stability (it sometimes feels hyper-extended) for activities like walking and stationary biking? The ones I've seen for osteoarthritis don't seem to fit round the patella.

Swimming is also highly recommended. Would I need a different brace for that?
Question by: Lorraine on Jun 10, 2013, 1:41 PM
Hello, Lorraine -

The Donjoy OA Adjuster 3 would be the most appropriate choice for your injury and activities.

You will want to get a 10 degree extension stop installed to assist in preventing hyperextension of the knee.

If you have further questions, please feel free to contact our product specialists at 888-405-3251.

Thank you and have a wonderful day!
Answer by: Admin on Jun 10, 2013, 1:41 PM
What is the frame on the OA adjuster made from? Aluminum?
Question by: Steve on Dec 18, 2013, 8:30 PM
Thank you for contacting DJO. The frame is made from Aircraft grade Aluminum
Answer by: Admin on Dec 18, 2013, 8:30 PM

Take the measurement of your thigh and calf 6" above and below your kneecap using a flexible type tape measure.  Use the diameter you measure here to choose your size.

    Size Thigh Knee Center Calf
    XS 13" - 15 1/2" 12"-13" 10"-12"
    S 15 1/2" - 18 1/2" 13"-14" 12"-14"
    M 18 1/2"- 21" 14"-15" 14"-16"
    L 21"- 23 1/2" 15"-17" 16"-18"
    XL 23 1/2" - 26 1/2" 17"-19" 18"-20"
    XXL 26 1/2" - 29 1/2" 19"-21" 20"-22"
    XXXL 29 1/2" -32" 21" -23" 22" -24

    Center Knee 1.Stand with your legs shoulder-width apart, legs slightly bent and leg muscles contracted.
    6 in Above 2. Measure up six inches from the center of your knee with a tape measure, as shown.
    Thig Circle 3. Measure the circumference of your thigh at the 6-inch mark, as shown.
    6 in below 4. Measure down six inches from the center of your knee with a tape measure, as shown. Then measure the circumference of your calf at the 6-inch mark.