| 摘要 |
The invention relates to a device (2) for dynamic posterior stabilisation that matches the anatomic lordosis and combines rigid means and viscoelastic means housed in a casing (21), including: a mobile piston rod (20) comprising a piston head at the end thereof; a viscoelastic shock-absorbing unit (23) having a convex surface; a fixed rod (22) defining an angle (γ) relative to the axis of the casing (21) and including at the end thereof a concave surface that perfectly matches the convex surface of the viscoelastic shock-absorbing unit (23); a viscoelastic ring (24) provided without preload and with optimised clearance inside the casing (21) containing the viscoelastic means (23, 24); wherein these novel means enable the device (2) to define an angle (γ) in a neutral position between the two fastening elements thereof to the pedicle screws, and to apply a permanent elastic-return force about this position while absorbing the compression and bending forces applied onto the pedicle screws.
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