OA Adjuster™ 3 Knee Brace


Attention Medicare Patients

The OA Adjuster™ 3 is powered by nano MAG™ and reinforced with a tough aluminum frame making it durable and functional.
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Mighty. Tough.

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

The improved OA Adjuster™ 3 is powered by nano MAG™ and reinforced with a tough aluminum frame making it durable and functional.

Features and Benefits:

  • Adjuster Technology
  • Provides the highest average amount of condylar separation. (Komistek Study—head-to-head comparisons of commercially available OTS OA knee braces.)

  • Lightweight and Tough
  • The combination of the durability of aluminum and leveraging the strength of nano MAG™ make it lightweight and tough.

  • Functional Comfort
  • Sleek design combines a new calf contour design and an evolution in nano MAG material science.

  • 4 Points of Leverage™ System
  • Pioneered by DonJoy, it provides ligament stability with:

    1. anterior thigh anchor
    2. posterior tibia anchor
    3. lower thigh strap pushes femur anteriorly
    4. anterior tibia strap applies an active constant load to prevent anterior tibial translation.

  • Contoured Calf Cuff
  • The posterior calf cuff is contoured to enhance overall brace suspension for various levels of activity and it is designed to fit a variety of body shapes and sizes.

  • Commended for Ease-of-Use by the Arthritis Foundation
  • The OA Adjuster 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.

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?

Osteoarthritis (OA) knee braces 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. Increased function studies have shown that wearing an OA brace can increase daily functions and help decrease pain.

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 support.
  • 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.

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Product Questions

How do I order spare/replacement keys for the OA Adjuster?
Question by: John on Oct 8, 2014, 8:10 PM
You would need to order that directly from DJO Global at 800-336-6569
Answer by: Admin on Oct 8, 2014, 8:10 PM

I am 63 years old and weight 205 lbs.

I had osteoarthrits, pain when walking.

Which one suitable for me.

Question by: Cherry on Dec 21, 2013, 4:09 PM

I recommend the OA Nano, it's our lightest OA Brace, weighing 14.2 ounces. You will need to know if you have medial or lateral OA, and order your brace based on that diagnosis.

Thanks for Contacting Donjoy.
Answer by: Admin on Dec 21, 2013, 4:09 PM
I have a grade 4 lesion in the articular cartilage lesion in my trochlear groove and will be having a microfracture surgery in the next couple of months. After I return to activity what type of brace would be best suited to protect that weaker fibrous tissue and prevent further damage to my groove. Also, what compartment would that fall under?
Question by: Cat on Mar 11, 2014, 7:37 AM
Thank you for your question. The OA braces would be best suited for a person with medial or lateral joint pains/injuries. If the pain is more central or in both medial and lateral compartments a DonJoy Deluxe Hinged Knee would be more appropriate.
Answer by: Admin on Mar 11, 2014, 7:37 AM
I am interested in the Donjoy OA Adjuster 3 Knee Brace and my measurements as taken 6" above and below the center of the knee are as follows: Thigh- 21", Knee- 16 1/4" and Calf- 14 1/2". Would you recommend the medium or large for me?
Question by: Jim C. on Jul 31, 2014, 6:55 AM
The large is the closest in in your size range. Your thigh and knee will fit well however you calf is smaller. To alleviate this you can press the sides of the calf cuff together to make it more snug.
Answer by: Admin on Jul 31, 2014, 6:55 AM
i am 32 years old and both knees are bad and believed to be deterioating. i still play sports but a lot of pain. what brace would you recomend.
Question by: Kevin on Jul 6, 2015, 2:37 PM
Hi Kevin,

I would recommend the Don Joy Reaction or OA Reaction.

Better Braces Sales Support
Answer by: Admin on Jul 6, 2015, 2:37 PM


Sizing: Thigh Circumference 6" above mid patella

Size Thigh
X-Small 13"-15.5" (33-39cm)
Small 15.5"-18.5"(39-47cm)
Medium 18.5"-21" (47-53cm)
Large 21"-23.5" (53-60cm)
X-Large 23.5"-26.5" (60-67cm)
XX-Large 26.5"-29.5" (67-75cm)
XXX-Large 29.5"-32" (75-81cm)