Intervertebral implant and device for inserting an intervertebral implant

Patent metadata

Field	Value
Publication number	US-10376374-B2
Application number	US-201615246448-A
Country	US
Kind code	B2
Filing date	Aug 24, 2016
Priority date	Aug 26, 2015
Publication date	Aug 13, 2019
Grant date	Aug 13, 2019

Abstract

An intervertebral implant has a hollow space formed within the implant and accessible through an elongate opening extending through a recessed portion of the side wall, and the hollow space is shaped to receive an engagement portion of a drive shaft of an insertion tool; and the intervertebral implant includes at least two guiding surfaces facing each other and being configured for sliding engagement by a portion of a sleeve of the insertion tool movably holding the drive shaft.

First claim

The invention claimed is:

1. A system comprising an intervertebral implant and a device to insert the intervertebral implant into a body, the intervertebral implant comprising a top surface, a bottom surface, and a side wall extending between the top surface and the bottom surface, the intervertebral implant having a hollow space having a spherical segment shape formed within the intervertebral implant and accessible through an elongate opening extending through a recessed portion of the side wall, and at least two guiding surfaces extending along an end of the intervertebral implant in an arc-shaped manner and facing one another such that the recessed portion of the side wall extends therebetween, wherein the device comprises:
a drive shaft including an engagement portion configured to engage the intervertebral implant in the hollow space; and
a sleeve movably holding and guiding the drive shaft and having a longitudinal axis, wherein the sleeve comprises an engagement structures;
wherein when the engagement portion of the drive shaft is received in the hollow space through the elongate opening and rotated by an angle about the longitudinal axis such that the engagement portion is supported in the hollow space, the engagement structure of the sleeve is configured to engage and slide laterally along the arc-shape of the at least two guiding surfaces, while being shaped to prevent rotation of the sleeve relative to the at least two guiding surfaces about the longitudinal axis.

2. The system according to claim 1 , wherein the recessed portion is set back from an outer contour of the intervertebral implant such as to provide the at least two guiding surfaces.

3. The system according to claim 1 , wherein at the location of the recessed portion of the side wall, an outer contour of the intervertebral implant is provided by an extension of the top surface and an extension of the bottom surface, each extending beyond the recessed portion of the side wall.

4. The system according to claim 3 , wherein the hollow space has a center point, wherein each of the extensions comprises a respective one of the at least two guiding surfaces, wherein each of the at least two guiding surfaces is concentric about a longitudinal axis extending through the center point.

5. The system according to claim 1 , wherein the intervertebral implant is a transforaminal lumbar interbody fusion (TLIF) implant having a kidney-shape, and includes a leading end and a trailing end, and wherein the hollow space, the recessed portion of the side wall, and the elongate opening are provided at or adjacent the trailing end.

6. The system according to claim 1 , further comprising an adjusting device configured to adjust a position of the drive shaft with respect to the sleeve along the longitudinal axis.

7. The system according to claim 1 , further comprising a resilient knob cooperating with the drive shaft and being indicative of a position of the drive shaft with respect to the sleeve along the longitudinal axis, in which the engagement structure engages the at least two guiding surfaces.

8. The system according to claim 1 , wherein the hollow space has a center point, wherein the recessed portion of the side wall is arranged to be concentric about a longitudinal axis extending through the center point.

9. The system according to claim 8 , wherein the recessed portion of the side wall has a cylindrical shape or a spherical shape.

10. The system according to claim 1 , wherein the sleeve further comprises another engagement structure adjacent the engagement structure and including a guiding face configured to engage one of the at least two guiding surfaces, wherein the guiding face has a rotational symmetry about the longitudinal axis of the sleeve to allow rotation of the sleeve with respect to the one of the at least two guiding surfaces.

11. The system according to claim 10 , wherein the another engagement structure includes at least one stop configured to limit a rotation of the sleeve with respect to the at least two guiding surfaces, to each define only one direction of rotation for transferring the engagement portion of the device from a first state into a second state and vice versa, respectively.

12. The system according to claim 1 , wherein the drive shaft and the sleeve each comprises a guiding structure configured to limit a movement of the drive shaft to that in a direction along the longitudinal axis, but prevent a rotation of the drive shaft with respect to the sleeve.

13. A system comprising an intervertebral implant and a device to insert the intervertebral implant into a body, the intervertebral implant comprising a top surface, a bottom surface, and a side wall extending between the top surface and the bottom surface, the intervertebral implant having a hollow space having a spherical segment shape formed within the intervertebral implant and accessible through an elongate opening extending through the side wall at an end of the intervertebral implant, the intervertebral implant further comprising at least two guiding surfaces extending along the end of the intervertebral implant in an arc-shaped manner and facing one another, wherein the device comprises:
a drive shaft including an engagement portion configured to engage the intervertebral implant in the hollow space; and
a sleeve movably holding and guiding the drive shaft and having a longitudinal axis, wherein the sleeve comprises an engagement structures;
wherein when the engagement portion of the drive shaft is received in the hollow space through the elongate opening and rotated by an angle about the longitudinal axis such that the engagement portion is supported in the hollow space, the engagement structure of the sleeve is configured to engage and slide laterally along the arc-shape of the at least two guiding surfaces, while being shaped to prevent rotation of the sleeve relative to the at least two guiding surfaces about the longitudinal axis.

14. The system according to claim 13 , wherein at a location of the side wall at the end of the intervertebral implant, an outer contour of the intervertebral implant is provided by an extension of the top surface and an extension of the bottom surface, each of the extensions comprising a respective one of the at least two guiding surfaces.

15. The system according to claim 14 , wherein the hollow space has a center point, and the outer contour at each of the extensions is concentric about a longitudinal axis extending through the center point.

16. The system according to claim 14 , wherein each of the extensions extends beyond a recessed portion of the side wall.

17. The system according to claim 13 , wherein the engagement portion of the drive shaft has a spherical shape flattened on opposite sides thereof.

18. The system according to claim 17 , wherein the spherical shape of the engagement portion of the drive shaft includes a greatest diameter of the sphere.

19. The system according to claim 13 , wherein the device is configured to rotate the intervertebral implant about a symmetrical center point of the hollow space via the drive shaft which may follow a path of the elongate opening of the intervertebral implant, and/or via the engagement structure sliding along a path defined by the at least two guiding surfaces.

20. The system according to claim 13 , wherein the spherical segment shape of the hollow space formed within the intervertebral implant forms an abutment against which an end face of the engagement portion of the drive shaft is configured t

Assignees

• Biedermann Timo
• Dandanopoulos Dimosthenis
• Dold Kevin
• Biedermann Technologies Gmbh

Inventors

• Biedermann Timo
• Dandanopoulos Dimosthenis
• Dold Kevin

Classifications

• A61F2/4603

  for insertion or extraction of endoprosthetic joints or of accessories thereof · CPC title

• A61F2002/30593

  hollow · CPC title

• A61F2002/30426

  Bayonet coupling · CPC title

• A61F2002/30795

  Blind bores, e.g. of circular cross-section · CPC title

• A61F2/4611

  of spinal prostheses · CPC title