FULLFORCE™ CLINICALLY-PROVEN PERFORMANCE
DONJOY

STANDARD POLYCENTRIC VS. FOURCEPOINT™

Most functional braces incorporate standard polycentric hinges that connect the thigh and calf frames through multi-centered pivot points. They provide a stabilizing force to the brace while attempting to mimic the knee’s natural movements.

FOURCEPOINT™
DonJoy has taken hinge design and ACL protection to another level with its patented FourcePoint technology. FourcePoint is the only hinge design that’s clinically proven to protect the ACL.2 It enhances DonJoy’s 4-Points-of-Leverage System by dampening knee-joint extension and improving the overall mechanical performance of the brace, increasing flexion angles (5°)2 while simultaneously reducing shear forces (9%-13%)3 at the knee. The FourcePoint hinge utilizes a leaf spring mechanism that gradually applies adjustable resistance (0, 1, 2, 4, and 6 lbs.) that engages in the last 25° of extension, reducing time spent in the “at-risk” position (flexion angles < 60°).4 As for prophylactic benefits, a recent clinical study shows athletes who trained wearing a DonJoy 4-Points-of-Leverage brace equipped with a FourcePoint hinge were estimated to decrease their chance of non-contact ACL injury by over 50%.5 That’s confidence every athlete can count on.

THE RESISTANCE SERVES 3 CRITICAL ROLES:

Reduces the time spent near full extension or in the “at-risk” position

Increases the posterior load applied by the brace on the tibia to prevent anterior tibial translation

Eliminates the extension shock felt when a patient extends into a 10° standard rigid stop
1 Beynnon et al. 1992. Beynnon et al. 1995. Beynnon et al. 1997. Fleming et al. 2000.
1 Beynnon et al. 1992. Beynnon et al. 1995. Beynnon et al. 1997. Fleming et al. 2000.
2 Garrett and Yu, AJSM, 2004.
3 Nunley et al. 2003.
4 Beynnon; Markolf.
5 Yu et al. 2008.
6 Beynnon et al. 1995B