Intervertebral implant
View Patent ↗An intervertebral implant comprising an intervertebral spacer and two fastener ties is disclosed. The intervertebral spacer may be formed having a body extending in a longitudinal direction. The intervertebral spacer may further include a first insertion face, a second face, and two recesses disposed at the ends of the body. The recesses may each be defined by a first extension, a second extension, and an end wall. Each of the two fastener ties may be secured to the first extension at a first end and a second end may be fastenable to the second face. The ties may pass around a spinous process in part and hold the spinous process within a recess. The first extension of the body may have a height relative to the bottom wall of the recess that is no greater than the height of the second extension.
1. An intervertebral implant for placing between the spinous processes of two adjacent vertebrae, the implant comprising:
an intervertebral spacer formed as a single part comprising a body having a longitudinal direction, presenting in said direction an insertion first face and a second face, and two recesses disposed at opposing ends along the longitudinal direction of the body, each recess being defined by a first extension extending from said insertion face, by a second extension extending from the second face of the body, and by an end wall;
a first fastener tie having a first end and a second end, the first end secured to at least one of the first extensions of the body and a second end fastenable to the second face of the body;
a second fastener tie having a first end and a second end, the first end secured to at least one of the first extensions of the body and a second end fastenable to the second face of the body; and
a single blocking means for blocking the second ends of both the first and second fastener ties together, said blocking means being fastenable in a releasable manner on the second face of said body;
wherein each first extension of the body presents a total height relative to the end wall of the recess that is less than a total height of each second extension, and that lies in the range of 1 mm to 3 mm.
2. An implant according to claim 1 , wherein the total height of each first extension of the body is less than 80% of the total height of each second extension.
3. An implant according to claim 2 , wherein the total height of each first extension of the body is greater than 30% of the total height of each second extension.
4. An implant according to claim 1 , wherein the spacer presents a plane of symmetry orthogonal to the longitudinal direction, and wherein said insertion face presents a convex shape that is symmetrical about said plane of symmetry.
5. An implant according to claim 1 , wherein said blocking means comprises a system for automatically blocking the second end of one of the first or second fastener ties.
6. An implant according to claim 1 , wherein said body comprises, in the longitudinal direction, a middle portion and two end portions in which said recesses are defined, the end portions presenting rigidity greater than that of the middle portion.
7. An implant according to claim 1 , wherein each of the fastener ties is constituted by a strip of flexible material.
8. An intervertebral implant for placing between the spinous processes of two adjacent vertebrae, the implant comprising:
an intervertebral spacer comprising a body having a longitudinal direction, the body having a first recess disposed at a first longitudinal end and a second recess disposed at a second longitudinal end wherein the first recess is defined by a first extension extending along a first face of the body and a second extension extending along a second face of the body and the second recess is defined by a third extension extending along the first face of the body and a fourth extension extending along the second face of the body;
a first fastener tie having a first end and a second end, the first end secured to the first extension of the body and the second end fastenable to the second face of the body;
a second fastener tie having a first end and a second end, the first end secured to the third extension of the body and the second end fastenable to the second face of the body; and
a single blocking means for blocking the second ends of both the first and second fastener ties together, the blocking means being fastenable in a releasable manner on the second face of said body;
wherein the first extension of the body and the third extension each have a total height relative to a bottom wall of the recess that is less than a total height of both the second and fourth extensions; and
wherein the spacer presents a plane of symmetry orthogonal to the longitudinal direction, and wherein the first face presents a convex shape that is symmetrical about the plane of symmetry.
9. The intervertebral implant of claim 8 , wherein the total height of each of the first and third extensions is between 1 millimeter and 3 millimeters.
10. The intervertebral implant of claim 9 , wherein the total height of the first extension is less than 80% of the total height of the second extension and wherein the total height of the third extension is less than 80% of the total height of the fourth extension.
11. The intervertebral implant of claim 10 , wherein the total height of the first extension is greater than 30% of the total height of the second extension and wherein the total height of the third extension is greater than 30% of the total height of the fourth extension.
12. The intervertebral implant of claim 8 , wherein the body comprises, in the longitudinal direction, a middle portion and two end portions in which the recesses are defined, the end portions having a rigidity greater than that of the middle portion.