Biospine Implants

Cousin Biotech Sas

Brice Sennequier

Frédéric Fortin

Johann Robin

Olivier Gilles

Stéphan Gaillard

The invention relates to a dynamic cervical disk prosthesis () comprising two upper () and lower () rigid plates containing a viscoelastic element (), said upper and lower plates (and) having a slightly cambered and striated contact face, the main characteristic of this invention being that the lower plate () is in the form of a housing, compatible with a twist-lock of the upper plate () while allowing the mobility and damping of the two plates (and) around the viscoelastic element () that can be freely distorted thereby avoiding all risk of detachment of the prosthesis when subjected to applied forces.

Dynamic cervical disk prosthesis provided with damping

A dynamic intervertebral stabilization device () comprising the following elements:

Dynamic intervertebral stabilisation device

Adjustable base piece () that can be incorporated into a prosthesis replacing the corpus vertebrae and comprising&#x2014;a plate () positioned in contact with an internal face of the adjacent corpus vertebrae; &#x2014;a curved panel () that can be adjusted in multiple directions by virtue of a ball stem () housed in a head () of the plate () which allows it to adopt the optimal angle with respect to this fixed plate (), so that the said curved panel (), thanks to its possibilities of multi-axis adjustment, can press espousing the external shape of the corpus vertebrae adjacent to the prosthesis, &#x2014;a clamping plug () which, once tightened, fixes the panel () to the plate () in the desired position, thus allowing this adjustable base piece () to be simultaneously in contact with an internal surface of the adjacent corpus vertebrae, thus giving this base piece, once attached to the corpus vertebrae, great bearing stability, with good adaptation to suit all shapes of vertebra encountered in real life.

Base piece adjustable prior to attachment and easily incorporated into a vertebral replacement device

The a device is provided for dynamic posterior stabilization. The device combines includes a mobile piston rod with a piston head at an end thereof; a viscoelastic shock-absorbing unit having a convex surface; a fixed rod defining an angle relative to an axis of a casing and the fixed rod including, at an end thereof, a concave surface; a viscoelastic ring; and wherein the viscoelastic components are contained within the casing.

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Pessac, France

Brice Sennequier