SYSTEM AND METHOD FOR A SPINAL IMPLANT LOCKING ASSEMBLY
First Claim
Patent Images
1. A spinal implant system comprising:
- a bone anchor;
a polyaxial head coupled to a proximal end of the bone anchor;
a spinal implant; and
a locking assembly having;
a bearing post with a proximal portion and a distal portion coupled by a longitudinal axis, wherein the distal portion is coupled to the polyaxial head and the proximal portion extends through an opening in the spinal implant;
a bushing having a first exterior surface and a first interior surface defining a first bore sized to receive the proximal portion of the bearing post, wherein the bushing is positioned on a first side of the opening;
a bearing element positioned on a second side of the opening and coupled to the bushing, the bearing element having a second exterior surface and a second interior surface defining a second bore sized to receive the proximal portion of the bearing post; and
a threaded locking member having a third exterior surface and a third interior surface defining a third bore sized to receive the proximal portion of the bearing post, wherein the threaded locking member is configured to rotationally engage a threaded surface on at least one of the proximal portion of the bearing post and the first interior surface of the bushing while enabling the bushing to rotate relative to the bearing post.
4 Assignments
0 Petitions
Accused Products
Abstract
Provided are a system and method for a spinal implant locking assembly. In one example, the system includes a bone anchor, a polyaxial head coupled to a proximal end of the bone anchor, a spinal implant, and a locking assembly. The locking assembly may have a bearing post with a distal portion coupled to the polyaxial head and a proximal portion that extends through an opening in the spinal implant. The locking assembly may also have a bushing, a bearing element, and a threaded locking member. The threaded locking member may be configured to rotationally engage a threaded surface on at least one of the bearing post and the bushing.
187 Citations
37 Claims
-
1. A spinal implant system comprising:
-
a bone anchor;
a polyaxial head coupled to a proximal end of the bone anchor;
a spinal implant; and
a locking assembly having;
a bearing post with a proximal portion and a distal portion coupled by a longitudinal axis, wherein the distal portion is coupled to the polyaxial head and the proximal portion extends through an opening in the spinal implant;
a bushing having a first exterior surface and a first interior surface defining a first bore sized to receive the proximal portion of the bearing post, wherein the bushing is positioned on a first side of the opening;
a bearing element positioned on a second side of the opening and coupled to the bushing, the bearing element having a second exterior surface and a second interior surface defining a second bore sized to receive the proximal portion of the bearing post; and
a threaded locking member having a third exterior surface and a third interior surface defining a third bore sized to receive the proximal portion of the bearing post, wherein the threaded locking member is configured to rotationally engage a threaded surface on at least one of the proximal portion of the bearing post and the first interior surface of the bushing while enabling the bushing to rotate relative to the bearing post. - View Dependent Claims (2, 3, 5, 6, 7)
-
-
4. The spinal implant system of claim 4 wherein the collet includes a slot extending in the direction of the longitudinal axis.
-
8. A locking assembly for a spinal implant comprising:
-
a bearing post having a proximal portion and a distal portion coupled by a longitudinal axis, wherein the distal portion is configured to engage a polyaxial head;
a bushing having a first exterior surface and a threaded first interior surface defining a first bore sized to receive the proximal portion of the bearing post;
a bearing element having a second exterior surface and a second interior surface defining a second bore sized to receive the proximal portion of the bearing post, wherein the bearing element is coupled to the bushing; and
a collet having a threaded third exterior surface configured to rotationally engage the threaded first interior surface and a third interior surface defining a third bore sized to receive the proximal portion of the bearing post, wherein the collet is rotationally fixed relative to the bearing post and the bushing is not rotationally fixed relative to the bearing post. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A locking assembly for a spinal implant comprising:
-
a bearing post having a threaded proximal portion and a distal portion coupled by a longitudinal axis, wherein the distal portion is configured to engage a polyaxial head;
a bushing having a first exterior surface and a first interior surface defining a first bore sized to receive the proximal portion of the bearing post, wherein the first interior surface is threaded to engage the threaded proximal portion of the bearing post;
a bearing element coupled to the bushing and having a second exterior surface and a second interior surface defining a second bore sized to receive the threaded proximal portion of the bearing post; and
a locking cap having a third exterior surface and a threaded third interior surface defining a third bore sized to receive the proximal portion of the bearing post, wherein the threaded third interior surface is configured to rotationally engage the threaded proximal portion and wherein the bushing is configured to rotate relative to the bearing post. - View Dependent Claims (22, 23, 24)
-
-
25. A kit comprising:
-
a bone anchor;
a polyaxial head configured to couple to a proximal end of the bone anchor;
a bearing post with a proximal portion and a distal portion coupled by a longitudinal axis, wherein the distal portion includes a threaded surface configured to engage a threaded surface of the polyaxial head;
a spinal implant including an opening with a coupling means inserted therein, wherein the coupling means includes a first interior surface defining a first bore sized to slidingly receive the proximal portion and a first exterior surface facing a surface of the opening, and wherein the coupling means is configured to rotate relative to the spinal implant around an axis extending through the bore; and
a threaded locking member having a second exterior surface and a second interior surface defining a second bore sized to receive the proximal portion of the bearing post, wherein the threaded locking member is configured to rotationally engage a threaded surface on at least one of the proximal portion of the bearing post and the first interior surface. - View Dependent Claims (26, 27, 28)
-
-
29. A method comprising:
-
inserting a bone anchor into a vertebral body, wherein the bone anchor is coupled to a polyaxial head;
inserting a bearing post into the polyaxial head;
adjusting a distance between a spinal implant and the polyaxial head by moving the spinal implant along a longitudinal axis of the bearing post;
locking a position of the polyaxial head relative to the bone anchor using the bearing post; and
securing a bushing coupled to the spinal implant to the bearing post by rotating the bushing relative to a locking member, wherein the rotation occurs around the longitudinal axis of the bearing post. - View Dependent Claims (30, 31, 32)
-
-
33. A locking assembly comprising:
-
a bearing post with a proximal portion and a distal portion coupled by a longitudinal axis;
coupling means positioned in an opening formed through a spinal implant, wherein the coupling means includes a smooth exterior surface abutting a surface of the opening and a threaded interior surface defining a first bore configured to at least partially receive a locking member; and
the locking member having a threaded exterior surface and an interior surface defining a second bore sized to slidingly receive the proximal portion of the bearing post, wherein the threaded exterior surface is configured to rotationally engage the threaded interior surface. - View Dependent Claims (34, 35, 36, 37)
-
Specification