Variable vertebral cage
AssigneeEndac co., Ltd
InventorsKyung Hak Kim, Gil Sam Lee
Life of this patent
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Abstract
Proposed is a vertebral cage including a body which is inserted between a vertebra and a neighboring vertebra, and is provided with a space part that can be filled with bone powder; a blade which is rotatably provided on an inner side surface of the body. The cage also includes a locking means which fixes the blade, which has or has not been rotated on the body, on the inner side surface of the body, wherein the locking means comprises fixing protrusions and groove parts which are provided on mutually facing surfaces of the body and the blade, and coupled to each other.
Claims14
A variable vertebral cage comprising:
- a shaft having two thread portions threaded in opposite directions on both sides and a non-threaded portion in a middle between the two thread portions on a longitudinal surface thereof;
- two wedge blocks provided on one end and the other end of the shaft, respectively, and configured to be moved toward and away from each other by rotation of the shaft;
- and
- movable blocks configured to be coupled to at least one wedge block of the two wedge blocks to define a variable space to be filled with bone powder, and provided above and below the at least one wedge block, respectively, to be moved by a movement of the at least one wedge block,
- wherein the shaft comprises
- a bone powder guide connected to the variable space, the bone powder guide allowing the bone powder to be inputted to the variable space from an external source, and
- a bone powder outlet disposed on the non-threaded portion in the middle between the two thread portions, wherein the bone powder is discharged into the variable space through the bone powder outlet,
- wherein each of the two wedge blocks comprises:
- a wedge surface configured to be in contact with one longitudinal end of each of the movable blocks;
- and
- a coupling protrusion provided on the wedge surface.
A variable vertebral cage comprising:
- a shaft having two thread portions threaded in opposite directions on both sides and a non-threaded portion in a middle between the two thread portions on a longitudinal surface thereof;
- two wedge blocks provided on one and the other ends of the shaft, respectively, and configured to be moved toward and away from each other by rotation of the shaft;
- and
- movable blocks configured to be coupled to at least one wedge block of the two wedge blocks to define a variable space to be filled with bone powder, and one movable block provided above and the other movable block below the at least one wedge block, respectively, to be moved by a movement of the at least one wedge block,
- wherein one wedge block of the two wedge blocks comprises a bone powder guide hole connected to the variable space, the bone powder guide hole allowing the bone powder to be inputted to the variable space from an external source through the bone powder guide hole,
- the shaft comprises a bone powder outlet disposed on the non-threaded portion in the middle between the two thread portions, wherein the bone powder is discharged into the variable space through the bone powder outlet,
- wherein each of the two wedge blocks comprises:
- a wedge surface configured to be in contact with one longitudinal end of each of the movable blocks;
- and
- a coupling protrusion provided on the wedge surface.
Dependencies are inferred from the claim text.