DJO Product Guide AUS - Flipbook - Page 116
ELECTROPHYSICAL
AGENTS
OUR TRADEMARKED INVENTION
THE FOURCEPOINT ™ HINGE
TABLES &
TRACTION
The DonJoy® FourcePoint™ Hinge utilises a leaf spring mechanism to apply gradually increasing
resistance during knee extension. The resistance engages in the last 25 degrees of extension
(relative to the extension stop). The hinge has three levels of resistance with the option to turn
off resistance if appropriate.
Flexion
Flexion
Flexion
Extension
Extension
Extension
BRACING &
SUPPORTS
EXOS®
HOT & COLD
THERAPY
VASCULAR
Aggressive eccentric contractions of the quadriceps produce
significant anterior tibial translation and can injure the ACL or
permanently stretch out an ACL graft1.
The resistance serves three critical roles:
Quadriceps-intensive activities should be avoided at joint
angles where strains are at a maximum, particularly the last
30 degrees of extension. Enovis has developed a hinge to
address maximising ACL and ACL graft protection in these “at
risk” positions.
2Gradually adds posterior load to the tibia complementing
the 4-Point-of-Leverage in preventing anterior
tibial translation.
Small knee flexion angles at initial contact during landing
tasks may contribute to ACL injuries. The FourcePoint Hinge
can be used to control joint range of motion by increasing the
knee flexion angle during landing, resulting in a decrease of
anterior shear force on the ACL by 9-13%2.
CPM
TAPES, BANDAGES
& CASTING
FourcePoint™ Study
Knee Flexion Angle at Landing
1Reduces the time spent near full extension or in the “at
risk” position.
3Eliminates the extension shock felt when a patient extends
into a 10 degree standard rigid stop.
FourcePoint™ Hinge Technology works to enhance DonJoy’s
4-Points-of-Leverage design by damping knee joint
extension, which improves the mechanical performance of
the brace and reduces shear forces at the knee.
The FourcePoint™ hinge combined with the
4-Points-of-Leverage cuff and strapping design provides
a more comfortable brace that reduces anterior shear
forces at the knee, providing protection to the healing graft
in ACL reconstructed patients, stability to an unstable
knee in ACL deficient persons, and prophylaxis during
sports activities.
35
30
EXERCISE &
RECOVERY
Degrees
25
20
15
10
No Brace
5
With Brace
0
Male
Wearing a FourcePoint™ brace
increased knee flexion angle at landing
in a stop-jump task with an average of
5.1° in males and 5.3° in females.
Female
DR. COMFORT®
& ORTHOTICS
1. DeMorat G, Weinhold P, Blackburn T, Chudik S, Garrett W. Aggressive quadriceps loading can induce noncontact anterior cruciate ligament injury. Am J Sports Med 2004;32(2):477-83.
2. Yu B, Herman D, Preston J, Lu W, Kirkendall DT, Garrett WE. Immediate effects of a knee brace with a constraint to knee extension on knee kinematics and ground reaction forces in a stop-jump
task. Am J Sports Med 2004;32(5):1136-43.
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