Pedicle screw assembly and method of assembly
AssigneeSkeletal Design Partnership, LLC
InventorDaniel S. Savage
Life of this patent
Estimating the term…
Abstract
A pedicle screw assembly and method of assembly are disclosed. The pedicle screw assembly includes a bone fastener having a head at a proximal end and a threaded portion extending between the proximal end and a distal end. The assembly also includes a compression member having a conical inner surface and a locking member having an outer surface adapted to mate with the conical inner surface of the compression member. The assembly may also have an elongated member and a set screw that has a threaded portion. The assembly may also have a receiving housing having a central bore extending from a threaded proximal end to a distal end and a U-shaped cavity positioned perpendicular to the central bore and configured to receive the elongated member.
Claims27
A pedicle screw assembly, comprising:
- a bone fastener having a head at a proximal end and a threaded portion extending between the proximal end and a distal end;
- a compression member having a cylindrical outer surface and a conical inner surface;
- a locking member having an outer surface adapted to mate with the conical inner surface of the compression member;
- and
- a receiving housing having a central bore extending from a proximal end to a distal end, wherein the distal end comprises a first opening sized to receive the head of the bone fastener and the proximal end comprises a second opening sized to receive the locking member and the compression member.
A pedicle screw assembly, comprising:
- a bone fastener having a head at a proximal end and a threaded portion extending between the proximal end and a distal end;
- a compression member having a cylindrical outer surface and a conical inner surface;
- a locking member having an outer surface adapted to mate with the conical inner surface of the compression member;
- an elongated member;
- a set screw having a threaded portion and a head portion having an internal drive opening;
- and
- a receiving housing having a central bore extending from a threaded proximal end to a distal end and a U-shaped cavity positioned perpendicular to the central bore and configured to receive that elongated member, wherein the distal end comprises a first opening sized to receive the head of the bone fastener and the proximal end comprises a second opening sized to receive the locking member and the compression member, the set screw is threadingly engaged to the threaded proximal end to apply a compressive load to the elongated member, whereby the compressive load is transmitted onto the compressive member and locking member to fix the bone fastener in a position relative to the receiving housing.
A method of assembly of a pedicle screw system, comprising:
- proximally inserting a locking member into a central bore of a receiving housing;
- inserting a head of a bone fastener through a distal opening of the central bore of the receiving housing to operationally couple with the locking member;
- seating the locking member in a distal portion of the central bore proximate to the distal opening;
- proximally inserting a compression member into the central bore of the receiving member;
- and
- positioning an internal conical surface of the compression member adjacent to an external conical surface of the locking member.
Dependencies are inferred from the claim text.