Decrease in constraints
• The final tightening torque is 30 to 50% below the
requirements of other systems, thus minimizing the
stress imposed on the overall construct and the
spine.1
• Implant manufacturing processes, notably those of the
pedicle screws, were designed in order to reduce
machining constraints and increase their reliability.
|
The thread pitch of the locking component is 0.5mm, which increases the contact surface between threads and optimizes the quality and reliability of tightening. |
| |
Contact surface
Easyspine® |
Point or
line of points
(traditional system) |
|
Mechanical tests
Mechanical testing by an independent laboratory
highlighted the following factors:
• 1400 N axial resistance was obtained by using a
tightening torque 30 to 50% below current standards.
• No change in screw-to-rod purchase was observed after
10 million cycles during a 3Hz frequency bending test
with a 750 N load.
• After this test, an axial resistance test of the same
assembly showed resistance superior to the one initially
measured. |
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