EFFECTIVENESS OF DONJOY ® OA BRACES
Reduced knee adduction moment and adduction impulse
MALALIGNMENT
ABERRANT BIOMECHANICS
INCREASED BODY WEIGHT
MUSCLE WEAKNESS
INCREASED COMPARTMENT LOADING
DECREASED ACTIVITY
DECREASED STABILITY
DECREASED CONFIDENCE
PAIN
• The knee adduction moment during walking forces the knee outwards (varus) and creates compression on the medial side of the knee joint. The first peak adduction moment happens during loading, the second peak adduction moment happens during push off. • DonJoy ® OA braces reduce peak knee adduction moment up to 32% during gait 10,35,38 and stair stepping 30 . • The more the hinge is dialed in, the greater the reduction of the knee adduction moment 35 .
1st Peak Add Moment
2nd Peak Add Moment
1
0.8
29% Adduction Moment Decrease
0.6
32% Adduction moment decrease
0.4
0.2
0
No Brace
Neutral Dial-in
Max Dial-in
No Brace
Neutral Dial-in
Max Dial-in
Fig. 7: Changes in first (blue bars) and second (green bars) peak knee adduction moments during gait in normally aligned subjects wearing the OA Adjuster brace with multiple hinge dial-in conditions 35 . Dial-in of the hinge produced reduction of the peak knee adduction moments.
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