FULLFORCE™ CLINICALLY-PROVEN PERFORMANCE
DONJOY

PASSIVE VS. DYNAMIC BRACES

There are two differing approaches to brace design – passive and dynamic. Passive brace designs don’t actively address instabilities, which allows the knee to move, or translate, before the brace takes effect – resulting in a greater chance of injury. DonJoy’s dynamic design, 4-Points-of-Leverage System, continually addresses instabilities at all times, whether a patient is running, jumping, or standing.

4-POINTS-OF-LEVERAGE™
DonJoy pioneered dynamic bracing with the 4-Points-of-Leverage System, a unique cuff and strapping configuration that provides a net differential posterior force to the tibia, preventing anterior movement. The center of the hinge is just posterior to the midline and just superior to the joint line. This allows points 1 and 3 to compress soft tissue, isolating the femur and bringing it forward. Points 2 and 4 draw the tibia posterior, generating a net differential force, or constant load, directly over the tibia, preventing it from moving forward. The result is significantly reduced strain on the ACL.1

1
2
3
4
POINT OF LEVERAGE 1

The femur is anchored by a cuff placed at the top of the anterior thigh.
POINT OF LEVERAGE 2

The tibia is anchored by a cuff placed at the bottom of the posterior calf.
POINT OF LEVERAGE 3

A strap across the back of the lower thigh pushes the femur anteriorly.
POINT OF LEVERAGE 4

A strap placed on the anterior tibia applies an active constant load to prevent anterior tibial translation.
1 Beynnon et al. 1992. Beynnon et al. 1995. Beynnon et al. 1997. Fleming et al. 2000.
2 Garrett and Yu, AJSM, 2004.