Spinal implant system and methods of use

Patent metadata

Field	Value
Publication number	US-10028770-B2
Application number	US-201414518760-A
Country	US
Kind code	B2
Filing date	Oct 20, 2014
Priority date	Oct 20, 2014
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

A spinal implant system comprises a plurality of alternate first members. Each of the first members includes an inner surface defining an implant cavity. A second member is configured to penetrate tissue and includes a mating element engageable with a first member such that the second member is interchangeable with the plurality of first members. A first member is selected for connection with the second member to comprise a bone fastener having a selected movement. Fasteners, instruments and methods are disclosed.

First claim

What is claimed is:

1. A spinal implant system comprising:
a plurality of alternate first members, each of the first members including an inner surface defining an implant cavity, the inner surfaces each defining a groove;
a second member being configured to penetrate tissue and including a mating element engageable with one of the plurality of first members such that the second member is interchangeable with the plurality of first members, the mating element comprising flats positioned on opposite sides of the mating element;
a circumferential ring positioned in the groove of one of the plurality of alternate first members to couple the second member to one of the plurality of alternate first members; and
a crown disposed with the implant cavity of one of the plurality of alternate first members and engageable with the second member,
wherein one of the plurality of first members is connected with the second member such that the flats directly engage the ring to comprise a bone fastener having a selected movement.

2. A spinal implant system as recited in claim 1 , wherein the mating element interfaces with a selected one of the plurality of alternate first members such that the second member is rotatable about a plurality of axes relative to the selected first member.

3. A spinal implant system as recited in claim 1 , wherein the mating element includes a head and the second member includes a shaft configured to penetrate the tissue, the shaft being rotatable about one or a plurality of axes relative to a selected one of the plurality of alternate first members.

4. A spinal implant system as recited in claim 3 , wherein the head is movable relative to the inner surface of the selected first member such that the shaft pivots through a plurality of planes relative to the selected first member.

5. A spinal implant system as recited in claim 1 , wherein the ring defines a gap.

6. A spinal implant system as recited in claim 5 , wherein the gap defines a dimension that is less than at least one dimension of the ring.

7. A spinal implant system as recited in claim 5 , wherein the gap defines a slot thickness that is less than a height and a width of the ring.

8. A spinal implant system as recited in claim 1 , further comprising a spinal rod disposable with the implant cavity of one of the plurality of alternate first members.

9. A spinal implant system as recited in claim 1 , wherein the mating element comprises arcuate portions between the flats.

10. A spinal implant system as recited in claim 1 , wherein the crown comprises a concave bottom surface that engages the mating element.

11. A spinal implant system as recited in claim 1 , wherein the plurality of alternate first members each include a first surface and a second surface that extends transverse to the first surface, the crown comprising a flange having a first surface that engages the first surface of one of the plurality of alternate first members and a second surface that engages the second surface of one of the plurality of alternate first members.

12. A spinal implant system as recited in claim 1 , wherein the mating element comprises a plurality of ridges.

13. A spinal implant system as recited in claim 1 , wherein the selected movement includes rotation and pivotal movement of the second member relative to one of the plurality of first members about a plurality of axes.

14. A spinal implant system as recited in claim 1 , wherein the selected movement includes rotation and pivotal movement of the second member relative to one of the plurality of first members through a plurality of planes.

15. A spinal implant system as recited in claim 1 , wherein the ring is configured to prevent axial translation of the second member relative to one of the plurality of alternate first members and facilitate rotation of the second member relative to one of the plurality of alternate first members.

16. A spinal implant system comprising:
a plurality of alternate implant receivers each comprising an inner surface defining a groove;
a bone screw shaft including a head engageable with a selected one of the implant receivers such that the shaft is compatible with the selected implant receiver, the head comprising flats positioned on opposite sides of the head;
a circumferential ring positioned in the groove of the selected implant receiver to couple the second member to the selected implant receiver; and
a crown disposed within an implant cavity of the selected implant receiver such that the head engages the crown, wherein the head includes an outer surface that defines a plurality of ridges to improve purchase of the head with the crown,
wherein the selected implant receiver is connected with the shaft such that the flats directly engage the ring to comprise a bone fastener having a selected movement.

17. A spinal implant system as recited in claim 16 , wherein the flats are spaced apart from the inner surface of the selected implant receiver by the ring.

18. A spinal implant system as recited in claim 16 , wherein an outer surface of the head includes arcuate portions that extend between the flats, the arcuate portions slidably engaging the inner surface of the selected implant receiver, the flats being spaced in a non-engaging orientation with the inner surface of the selected implant receiver such that the inner surface of the selected implant receiver is movable relative to the outer surface.

Assignees

• Warsaw Orthopedic Inc

Inventors

• Rezach William Alan
• May Jason

Classifications

• A61B17/7035 Primary

  Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other · CPC title

• A61B17/7032

  Screws or hooks with U-shaped head or back through which longitudinal rods pass · CPC title

• A61B17/7037 Primary

  wherein pivoting is blocked when the rod is clamped · CPC title

• A61B17/7038

  to a different extent in different directions, e.g. within one plane only · CPC title