Artificial ligament for the spine
AssigneePolyclinique de Bourgogne & Les Hortensiad
InventorJacques Commarmond
Life of this patent
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Abstract
An artificial ligament for the spine is fixed by pedicle screws on two vertebrae of the spinal column and has first and second hollow eyelets, of general diabolo shape, each one including a concave seat intended to receive the head of the fixation screw; a body haivng a narrowed area; a convex hump complementing the concave seat and intended to be directed towards the vertebrae. The artificial ligament itself is made of a flexible textile material having a longitudinal primary winding arranged in figure eight formation between the narrowed areas of two successive eyelets and a transverse secondary winding arranged in contiguous spirals around the primary winding.
Claims5
Artificial ligament (i) for the spine, intended to be fixed by pedicle screws on two vertebrae (31, 33) of the spinal column (30), characterized in that it consists of:
- a first hollow eyelet (1, 1', 1") and a second hollow eyelet (10, 10', 10"), of general diabolo shape, each one comprising in order:
- a concave seat (3) intended to receive the head of the fixation screw;
- a body (4) having a narrowed area (5);
- a convex hump (6) complementing the concave seat (3) and intended to be directed towards the vertebra (31-37);
- an artificial ligament proper, made of a flexible textile material, consisting of:
- a longitudinal primary winding (20) arranged in figure of eight formation between the narrowed areas (5, 15) of two successive eyelets (1, 10);
- a transverse secondary winding (25) arranged in contiguous spirals around the primary winding (20).
Dependencies are inferred from the claim text.