Spinal implant system and method

Patent metadata

Field	Value
Publication number	US-9220539-B2
Application number	US-201213424048-A
Country	US
Kind code	B2
Filing date	Mar 19, 2012
Priority date	Mar 19, 2012
Publication date	Dec 29, 2015
Grant date	Dec 29, 2015

Abstract

An extender includes a first arm defining a first longitudinal axis and including a first extension and a second extension. The first extension includes an outer surface and a projection extending from the outer surface, the projection including a ramp and a first locking element. The first extension includes an inner surface defining a longitudinal cavity. The projection is transversely moveable between a first configuration such that the projection extends beyond the outer surface and a second configuration whereby the second extension axially translates within the longitudinal cavity and engages the ramp such that the projection is disposed in alignment with the outer surface and the first locking element engages an implant. Methods of use are disclosed.

First claim

What is claimed is:

1. An extender comprising:
a first arm defining a first longitudinal axis and including a first extension and a second extension,
the first extension including an outer surface and a projection extending from the outer surface, the projection including a ramp and a first locking element, the first extension including an inner surface defining a longitudinal cavity, and
an actuator configured to cause axial translation of the second extension within the longitudinal cavity, wherein a cylindrical in is inserted through an eyelet in the second extension and an opening in a locking element of the actuator such that the locking element is pivotable relative to the first and second extensions,
wherein the projection is transversely moveable between a first configuration such that the projection extends beyond the outer surface and a second configuration whereby the second extension axially translates within the longitudinal cavity and engages the ramp such that the projection is disposed in alignment with the outer surface and the first locking element engages an implant.

2. An extender as recited in claim 1 , further comprising a second arm including a second locking element that engages the implant.

3. An extender as recited in claim 1 , further comprising a second arm including a first extension and a second extension, the first extension of the second arm including an outer surface and a projection extending therefrom, the projection of the second arm including a ramp and a second locking element, the first extension of the second arm including an inner surface defining a longitudinal cavity, the projection of the second arm being transversely moveable between the first configuration and the second configuration such that the second locking element engages the implant.

4. An extender as recited in claim 1 , further comprising a second arm including an outer surface having a concave portion and the outer surface of the first arm having a concave portion, the concave portions defining an implant cavity.

5. An extender as recited in claim 1 , wherein the projection pivots relative to the outer surface.

6. An extender as recited in claim 1 , wherein the first locking element comprises a pointed tip and a flange configured to engage the implant.

7. An extender as recited in claim 1 , wherein the ramp is tapered between a proximal end having a first height and a distal end having a second, decreased height, the distal end being closer to a tip of the first locking element than the distal end.

8. An extender as recited in claim 1 , wherein the second extension includes a first stop engageable with the ramp to define a first moveable limit of the second extension and a second stop engageable with the ramp to define a second moveable limit of the second extension along the first longitudinal axis.

9. An extender as recited in claim 1 , wherein a distal end of the first extension includes a first flange and a second flange, the flanges being configured for capture of the implant.

10. An extender as recited in claim 1 , wherein the implant includes a bone fastener.

11. An extender as recited in claim 1 , wherein a distal end of the first extension includes a flange extending transverse to the first longitudinal axis and being configured to engage the implant.

12. An extender as recited in claim 1 , wherein the locking element of the actuator is engageable with the first extension and being configured to fix the second extension in the second configuration.

13. An extender as recited in claim 12 , wherein the locking element of the actuator is biased into engagement with the first extension.

14. An extender as recited in claim 12 , wherein the actuator includes a depressible tab configured to disengage the locking element of the actuator from the first extension.

15. An extender as recited in claim 1 , wherein the ramp extends through a cavity in the second extension as the projection moves between the first and second configurations.

16. An extender as recited in claim 1 , wherein the first extension comprises a concave portion and a convex portion opposite the concave portion, the concave portion comprising a plurality of rails each extending between side surfaces of the first extension, the rails being configured to retain at least a portion of the second extension within the longitudinal cavity.

17. An extender comprising:
a first arm defining a first longitudinal axis and including a first extension and a second extension,
the first extension including an outer surface and a projection extending from the outer surface, the projection including a ramp and a first locking element, the first extension including an inner surface defining a longitudinal cavity, and
an actuator configured to cause axial translation of the second extension within the longitudinal cavity, wherein a cylindrical pin is inserted through an eyelet in the second extension and an opening in a locking element of the actuator such that the locking element is pivotable relative to the first and second extensions,
wherein the projection is transversely moveable between a first configuration such that the projection extends beyond the outer surface and a second configuration whereby the second extension axially translates within the longitudinal cavity and engages the ramp such that the projection is disposed in alignment with the outer surface and the first locking element engages an implant,
wherein the ramp extends through a cavity in the second extension as the projection moves between the first and second configurations.

18. An extender comprising:
a first arm defining a first longitudinal axis and including a first extension and a second extension,
the first extension including an outer surface and a projection extending from the outer surface, the projection including a ramp and a first locking element, the first extension including an inner surface defining a longitudinal cavity,
wherein the projection is transversely moveable between a first configuration such that the projection extends beyond the outer surface and a second configuration whereby the second extension axially translates within the longitudinal cavity and engages the ramp such that the projection is disposed in alignment with the outer surface and the first locking element engages an implant,
wherein the second extension includes a first stop engageable with the ramp to define a first moveable limit of the second extension and a second stop engageable with the ramp to define a second moveable limit of the second extension along the first longitudinal axis, and
wherein the limits define a cavity therebetween configured for moveable disposal of the ramp.

Assignees

• Mcbride Larry
• Justis Jeff
• Warsaw Orthopedic Inc

Inventors

• Mcbride Larry
• Justis Jeff

Classifications

• A61B17/7076

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

• A61B17/7032 Primary

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

• A61B17/708

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

• A61B17/7085

  for insertion of a longitudinal element down one or more hollow screw or hook extensions, i.e. at least a part of the element within an extension has a component of movement parallel to the extension's axis · CPC title