Vertebral stabilization devices and associated surgical methods
View Patent ↗A vertebral stabilization device operable for stabilizing and/or decompressing a portion of the spine, including: a first frame member; a second frame member; a first connector member engaged to the first frame member for securing the first frame member to a first structure of the spine; and a second connector member engaged to the second frame member for securing the second frame member to a second structure of the spine; wherein the first frame member and the second frame member are in a telescoping relationship with each other. The first and second structures of the spine may include spinous processes, laminae, sacral structures, or any other suitable structures. Preferably, the first connector member and the second connector member are substantially arcuate in shape, and may face towards each other, away from each other, or in the same direction.
1. A vertebral stabilization device operable for stabilizing and/or decompressing a portion of the spine, comprising:
a first frame member comprising a first plurality of bone screw openings, wherein the first plurality of bone screw openings extend all the way through the first frame member such that a bone screw can extend through one of the first plurality of bone screw openings and into a bone of the spine, and wherein the first plurality of bone screw openings extend in at least a substantially linear fashion;
a second frame member comprising a second plurality of bone screw openings, wherein the second plurality of bone screw openings extend all the way through the second frame member such that a bone screw can extend through one of the second plurality of bone screw openings and into a bone of the spine, and wherein the second plurality of bone screw openings extend in at least a substantially linear fashion;
a first connector member engaged to the first frame member for securing the first frame member to a first structure of the spine;
a second connector member engaged to the second frame member for securing the second frame member to a second structure of the spine;
a first bone screw configured to be selectively disposed through at least one of the first plurality of bone screw openings of the first frame member and configured to extend into the first structure of the spine adjacent to the first connector member; and
a second bone screw configured to be selectively disposed through at least one of the second plurality of bone screw openings of the second frame member and configured to extend into the second structure of the spine adjacent to the second connector member;
wherein the first frame member and the second frame member are in a telescoping relationship with each other such that the first frame member is configured to be at least partially received within the second frame member for forming the telescoping relationship, wherein movement of the first frame member within the second frame member is supported by at least substantially an entire length of the second frame member receiving the first frame member, apd wherein telescoping portions of the first frame member and second frame member are configured such that rotation with respect to each other is inhibited, wherein the first frame member comprises a longitudinal axis, wherein the second frame member comprises a longitudinal axis, wherein the first frame member is configured to be at least partially received within the second frame member at least substantially along the longitudinal axes of the first and second frame members, wherein the first plurality of bone screw openings extend in a direction at least substantially perpendicular to the longitudinal axis of the first frame member, and wherein the second plurality of bone screw openings extend in a direction at least substantially perpendicular to the longitudinal axis of the second frame member.
2. The vertebral stabilization device according to claim 1 , wherein the first connector member and the second connector member are substantially arcuate in shape.
3. The vertebral stabilization device according to claim 1 , further comprising a securement mechanism positioned on the second frame member for providing a secured arrangement between the first frame member and the second frame member.
4. The vertebral stabilization device according to claim 1 , wherein at least a subset of the first plurality of bone screw openings comprises mutually overlapping receiving bores.
5. A vertebral stabilization device operable for stabilizing and/or decompressing a portion of the spine comprising:
a first frame member comprising a first plurality of bone screw openings, wherein the first plurality of bone screw openings extend all the way through the first frame member such that a bone screw can extend through one of the first plurality of bone screw openings and into a bone of the spine, wherein the first frame member comprises a longitudinal axis, and wherein the first plurality of bone screw openings extend in a direction at least substantially perpendicular to the longitudinal axis of the first frame member;
a second frame member comprising a second plurality of bone screw openings, wherein the second plurality of bone screw openings extend all the way through the second frame member such that a bone screw can extend through one of the second plurality of bone screw openings and into a bone of the spine, and wherein the second frame member further comprises a non-circular recess defined by the body of the second frame member for at least partially receiving a portion of the first frame member having a non-circular cross-section, forming a telescoping relationship between the first frame member and the second frame member, wherein the telescoping relationship is configured such that the first frame member is at least substantially prevented from pivoting relative to the second frame member while the first frame member is at least partially received in the second frame member, wherein the second frame member comprises a longitudinal axis and wherein the second plurality of bone screw openings extend in a direction at least substantially perpendicular to the longitudinal axis of the second frame member wherein the first frame member is configured to be at least partially received within the second frame member at least substantially along the longitudinal axes of the first and second frame members;
a first connector member engaged to the first frame member for securing the first frame member to a first structure of the spine;
a second connector member engaged to the second frame member for securing the second frame member to a second structure of the spine;
a securement mechanism for securing the first frame member to the second frame member and preventing telescoping movement of the first frame member with respect to the second frame member;
a first bone screw configured to be selectively disposed through at least one of the first plurality of bone screw openings of the first frame member and configured to extend into the first structure of the spine adjacent to the first connector member; and
a second bone screw configured to be selectively disposed through at least one of the second plurality of bone screw openings of the second frame member and configured to extend into the second structure of the spine adjacent to the second connector member.
6. The vertebral stabilization device according to claim 5 , wherein the securement mechanism comprises a set screw positioned on the second frame member for preventing telescoping movement between the first frame member and the second frame member.
7. The vertebral stabilization device according to claim 1 , wherein the telescoping portions of the first frame member and the second frame member have substantially rectangular cross-sections.
8. The vertebral stabilization device according to claim 1 , wherein the first frame member comprises a ridge configured to restrict the telescoping movement of the first frame member relative to the second frame member.
9. The vertebral stabilization device according to claim 5 , wherein the first frame member comprises a ridge configured to restrict the telescoping movement of the first frame member relative to the second frame member.
10. The vertebral stabilization device according to claim 1 , wherein at least a subset of the second plurality of bone screw openings comprises mutually overlapping receiving bores.
11. The vertebral stabilization device according to claim 4 , wherein at least a subset of the second plurality of bone screw openings comprises mutually overlapping receiving bores.
12. The vertebral stabilization device according to claim 1 , wherein the first frame member further comprises a widened portion configured to accommodate the first plurality of bone screw openings, and wherein the second frame member further comprises a widened portion configured to accommodate the second plurality of bone screw openings.