protect.4® OA

4-point rigid knee orthosis
  • Exact and effective valgus or varus pressure
  • Cushioned frame padding
  • Ultraflat and very light weight
Product variety
Standard colours
Suitable for
Men's sizing
Women's sizing
Material components
Aluminum, Polyamide, PU

4-point rigid knee orthosis for control of anterior and posterior tibial translation. 3-point off-loader for varus- or valgus pressure relief.

protect.4 OA is a brace for varus/valgus pressure relief. The product is exclusively to be used for the orthotic fitting of the knee and only on unbroken skin.

Product features
  • Relief of the lateral or medial compartment using the 3-point-principle
  • Stabilisation of the knee joint via the 4-point-stabilisation-principle
  • Flat and lightweight frame design
  • Anatomically pre-moulded, twist-resistant frame geometry
  • Reliable varus/valgus articulations located close to the hinge
  • Numbered straps provide easy and secure usage
  • Padding set for individual patient adaption
  • Wedge set for flexible extension and flexion limitation
  • Limitations:
    • Extension: 0°, 10°, 20°, 30°, 45°
    • Flexion: 0°, 10°, 20°, 30°, 45°, 60°, 75°, 90°
    • Immobilisation: 0°, 10°, 20°, 30°, 45°
Intended purpose

protect.4 OA is a rigid brace for relief and stabilisation of the knee joint.


All indications requiring unicompartimental relief by 3 point principle and additional physiological guidance and stabilization by 4 point principle and if necessary limitations of Range of motion such as:

  • Severe medial or lateral gonarthrosis (at least level III) combined with ligament instability
  • Unicompartmental relief at serve gonarthrosis before HTO (brace test)
  • Cartilage surgery or chondroplasty
  • Meniscus intervention
  • Combined lateral and medial osteoarthitis
Size table

circumference of thigh 15 cm above the centre of the knee

15 cm6“5 cm2“
Circumferences in cm kT31 -3737 - 4545 - 5151 - 5757 - 6565 - 74
article number varus leftkBG.645.201G.645.202G.645.203G.645.204G.645.205G.645.206
article number varus rightkBG.645.301G.645.302G.645.302G.645.303G.645.303G.645.304
article number valgus leftkBG.646.201G.646.202G.646.203G.646.204G.646.205G.646.206
article number valgus rightkBG.646.301G.646.302G.646.302G.646.303G.646.303G.646.304
Contact us
Contact for usersContact for users
Contact us
+49 921 912-0
+49 921 912-783
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