Spinal implant system and method

Patent metadata

Field	Value
Publication number	US-9333012-B2
Application number	US-201113280462-A
Country	US
Kind code	B2
Filing date	Oct 25, 2011
Priority date	Oct 25, 2011
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

A spinal implant system includes a first member including at least one wall, which includes a first axial end surface, a second axial end surface and an outer surface including a locking cavity. A second member includes a first extension defining an inner surface and a second extension defining an inner surface, the inner surfaces defining a first cavity therebetween. At least one of the inner surfaces includes a first angled portion and a second angled portion. A third member is disposed in the first cavity, and includes a first arm and a second arm, at least one of the arms includes a protrusion. The third member is configured for axial translation relative between a first orientation and a second orientation. Methods of use are disclosed.

First claim

What is claimed is:

1. A spinal implant system comprising:
a first member extending along a longitudinal axis between a proximal portion and a distal portion, the proximal portion including a pair of walls, inner surfaces of the walls defining an implant cavity, the distal portion including a tissue penetrating portion, the walls each including first and second axial end surfaces that each extend from the inner surface of one of the walls to an opposite outer surface of one of the walls, the outer surfaces each including a locking cavity;
a second member comprising a body and a pair of extensions that extend from the body, the extensions being spaced apart from one another by a first cavity, the extensions each comprising opposing faces that engage the axial end surfaces of one of the walls to couple the second member to the first member; and
a third member disposed in the first cavity, and including an inner surface having a protrusion extending therefrom,
wherein the third member is configured for axial translation relative to the second member between a first orientation in which the protrusion is disposed in one of the locking cavities and a second orientation in which the protrusion is spaced apart from the locking cavities.

2. The spinal implant system of claim 1 , wherein the opposing faces define a longitudinal channel, the walls each being positioned within one of the longitudinal channels.

3. The spinal implant system of claim 1 , wherein the tissue penetrating portion is rotationally fixed to the proximal portion.

4. The spinal implant system of claim 1 , wherein the tissue penetrating portion is configured for multi-axial positioning with respect to the proximal portion.

5. The spinal implant system of claim 1 , wherein the locking cavities each extend perpendicular to the longitudinal axis.

6. The spinal implant system of claim 1 , wherein at least one of the locking cavities is a blind hole.

7. The spinal implant system of claim 1 , wherein the first and second axial end surfaces of a respective one of the walls are positioned at opposite sides of the respective one of the walls.

8. The spinal implant system of claim 1 , wherein the protrusion is biased inwardly toward the one of the locking cavities as the third member translates axially relative to the second member.

9. The spinal implant system of claim 1 , wherein the first and second axial end surfaces of a respective one of the walls are each orientated at an acute angle relative to an outer circumference defined by the outer surface of the respective one of the walls.

10. The spinal implant system of claim 1 , wherein the protrusion extends perpendicular to the inner surface of the third member.

11. The spinal implant system of claim 1 , wherein the protrusion has an arcuate configuration.

12. The spinal implant system of claim 1 , wherein the inner surface of the second member is concavely curved between the opposing faces and wherein the outer surfaces of the walls are each convexly curved between the first and second axial end surfaces.

13. The spinal implant system of claim 1 , wherein the walls each include a proximal end surface extending perpendicular to the longitudinal axis, the first and second axial surfaces extending through the proximal end surfaces.

14. The spinal implant system of claim 1 , wherein the protrusion occupies substantially all of the one of the locking cavities when the protrusion is received within the one of the locking cavities.

15. The spinal implant system of claim 1 , wherein the locking cavities are each positioned between the axial surfaces of a respective one of the walls, the axial end surfaces each defining a thickness of one of the walls, wherein a distance between the axial end surfaces of the respective one of the walls defines a maximum width of the respective one of the walls.

16. A spinal implant system comprising:
a bone fastener extending along a longitudinal axis between a proximal portion and a distal portion including a tissue penetrating portion, the proximal portion including opposing wall portions, inner surfaces of the wall portions defining an implant cavity, the wall portions each comprising first and second axial end surfaces that each extend from the inner surface of one of the walls to an opposite outer surface of one of the walls, the outer surfaces each including a transverse groove;
a sleeve extending comprising a body and a pair of extensions that extend from the body, the extensions being spaced apart from one another by a first cavity, the extensions each comprising opposing faces that engage the axial end surfaces of one of the wall portions to couple the sleeve to the bone fastener; and
an extender disposed in the first cavity, and including an inner surface including a transverse protrusion extending therefrom,
wherein the extender is configured for axial translation relative to the sleeve between a first orientation in which the transverse protrusion is disposed in one of the transverse grooves and a second orientation in which the transverse protrusion is spaced apart from the transverse grooves.

17. The spinal implant system of claim 16 , wherein the opposing faces define a longitudinal channel, the wall portions walls each being received within one of the longitudinal channels.

18. The spinal implant system of claim 16 , further comprising a lock that prevents axial translation of the extender relative to the sleeve.

19. A method for treating a spine, the method comprising the steps of:
providing a spinal implant system including:
a first member extending along a longitudinal axis between a proximal portion and a distal portion, the proximal portion including a pair of walls, inner surfaces of the walls defining an implant cavity, the distal portion including a tissue penetrating portion, the walls each including first and second axial end surfaces that each extend from the inner surface of one of the walls to an opposite outer surface of one of the walls, the outer surfaces each including a locking cavity,
a second member comprising a body and a pair of extensions that extend from the body, the extensions being spaced apart from one another by a first cavity, the extensions each comprising opposing faces that engage axial end surfaces of one of the walls to couple the second member to the first member, and
a third member disposed in the first cavity, and including an inner surface having a protrusion extending therefrom;

axially translating the third member relative to the second member to a first orientation such that the protrusion is disposed in one of the locking cavities; and
axially translating the third member relative to the second member to a second orientation such that the protrusion is spaced apart from the locking cavities.

20. The spinal implant system of claim 19 , further comprising the step of delivering the first member to a surgical site.

Assignees

• Beale Jeffrey W
• Mcbride Larry T
• Miller Keith E
• Warsaw Orthopedic Inc

Inventors

• Beale Jeffrey W
• Mcbride Larry T
• Miller Keith E

Classifications

• A61B17/7076 Primary

  for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation · CPC title

• A61B17/708

  with tubular extensions coaxially mounted on the bone anchors · CPC title

• A61B17/7082

  for driving, i.e. rotating, screws or screw parts specially adapted for spinal fixation, e.g. for driving polyaxial or tulip-headed screws · CPC title