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DonJoy OA Assist Osteoarthritis Knee Brace

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DonJoy OA Assist Osteoarthritis Knee Brace

Patient-ready knee osteoarthritis
brace that is ideally suited for activities of daily living.

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Pain Relief for Active People

DonJoy’s technologically advanced design combines a single upright frame and the 3DF hinge on the OA ASSIST. A patient-ready knee osteoarthritis brace that is ideally suited for activities of daily living.

Features and Benefits

  • Single upright frame with 3 point load that shifts compressive knee joint forces from degenerative area to healthy compartment
  • Telescoping condyle pad (up to 6º of correction) enables patients to adjust load according to activity level
  • 3rd Degree of Freedom (3DF) hinge allows rotation on the calf cuff for an optimal fit (+ / - 11º of rotation from the neutral position)
  • Lightweight and molded EVA foam condyle pad for increased comfort and compliance
  • Lightweight (17 oz.), aircraft grade aluminum frame (0.100” thick)
  • Ergonomic, swooping thigh and calf cuffs provide clearance for the contralateral leg
  • Sili-Grip strap pads and liners promote brace suspension
  • Contoured, flexible cuff shells conform to patient anatomy and help contain tissue
  • Swiveling D-Rings to accommodate leg movement
  • 7 sizes and 1 length (14.5”)
  • Flexion and extension control
  • 1 year warranty on frame and hinges

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 treat OA. They stabilize the joint, reduce pain and help to build stronger muscles, 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 relieve pain by redistributing the weight bearing load on the painful or affected compartment of the joint to the healthy or unaffected compartment. Increased function Studies have shown that wearing an OA brace can increase daily functions and decrease pain. Patients diagnosed with OA who wear a knee brace will generally feel better in the morning, be more active during the day, and rest more comfortably at night.

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***

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

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.


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Questions on DonJoy OA Assist Osteoarthritis Knee Brace

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  • From Thomas at 8/31/2011 10:16 AM
    • If I am looking to unload the interior of my Knee Joint do I order a medial or lateral OA Brace?
    • niether will offload the interior you have to pick which side is more painful.
  • From John R. at 6/7/2013 12:08 AM
    • I suffer from OA, prior torn ACL and both meniscus in my right knee. I've been wearing the OA Lite brace and was trying to jog with it, but it doesn't give me what I'm looking for. Will the OA Assist give me more support and help take the strain off my knee while jogging? If not, can you recommend another brace that would be more well suited for my condition and for jogging?
    • Hello John,

      Do you have OA in both the medial and lateral compartment of your Right Knee? The OA braces are designed to shift the weight off your injured compartment to the healthy compartment.

      For example, if you have medial OA, damage to the Medial side of your knee. The knee brace would shift weight to the lateral side which is the healthy side of your knee.

      If you have damage to both compartments in Right Knee, We don't recommend using OA Brace. This would create more pain.

      If that is the case, I would recommend a FullFource Brace.

      Please call in and speak to a Product Specialist. 1-888-405-3251.
  • From ken at 2/27/2014 1:10 PM
    • if you have medial meniscal disease, do you then want a medial support or a lateral one
    • For a medial meniscus tear you would want a medial unloader.
  • From absingh at 3/5/2014 11:48 PM
    • what is meant by medial and lateral type. how to know it.
    • Arthritis is either in the medial (inner knee)portion of the knee or the lateral(outer knee_ compartment or both. Our braces can unload one compartment either the latera(outer) or medial (inner)
  • From Linda at 5/14/2014 7:15 AM
    • I have OA with bone on bone on my right knee medial side. Would this be the brace to order or would the Nano work better. I do a lot of walking but not any heavy exercising. My md said I needed a uploaded.
    • Linda
      The OA Assist is for people who are not very active, so if you just do some occasional walking this brace will be fine. The OA Nano is for a very active person. In either of these braces you would need to unload the medial comparment.
  • From Gail at 12/29/2014 8:07 AM
    • My mom is 80 y.o. 150lbs, has severe chronic OA on both knees and uses a walker, will she benefit from don joy everyday or the OA assist?
      I am looking for a brace to help ease her pain and discomfort on getting up from prolonged sitting and lying down, support her on Activities of Daily living while not cumbersome for her .
    • Gail
      Wear either of those braces on both knee will be cumbersome. If your mother needs to unload the medial compartment then the OA Assist will be a better choice because the hinge will be on the outside of the knee and the two braces will not hit each other. You may want to think about just getting her a standard hinged knee brace to give her basic stability to help her stand up and get around with the walker. The Don Joy Deluxe hinged knee brace will do just that but will not unload her knees.
  • From Mary South at 1/30/2015 7:21 AM
    • Is this brace a velcro wrap around or a step into brace? I would like to have more explanation on the donning and doffing of your OA braces.
      Thank you
    • Mary
      The OA Assist is applied by placing the brace on the knee and using the velcro straps around the leg. It is not a step into brace like our other OA braces.

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