Prosthetic cage for spine

• US 20010049559A1
• Filed: 01/05/2001
• Published: 12/06/2001
• Est. Priority Date: 01/06/2000
• Status: Active Grant

• Current Assignee: Jung Soo Han, U&I Corporation
• Original Assignee: Ja Kyo Koo, Jung Soo Han
• Inventors: Min, Ki Sik, Kim, Kyung Tae, Kim, Byung Soo, Han, Jung Soo, Ahn, Jae Yong, Shin, Chan Soo, Kim, Jung Sung, Koo, Ja Kyo, Jun, Chang Hun
• Granted Patent: US 6,428,575 B2
• Time in Patent Office: Days
• US Class Current: 623/17.16
• CPC Class Codes: A61F 2/446 having a circular or elliptical cross-section substantially parallel to the axis of the spine, e.g. cylinders or frustocones
• CPC Class Codes: A61F 2002/2835 Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30787 inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/30851 Multiple threadings

Abstract

A prosthetic cage for spine adapted to be implanted in an intervertebral disc space between two vertebral bodies in a spine and to accommodate fusion of the disc space, said cage being a tubular body with an internal aperture, an external surface of which having a plurality of wall apertures each perpendicular to the longitudinal axis thereof and communicating with the internal aperture, and dual convex screw threads extended therefrom, such that the cage of the present invention has an advantage that the stability of fixation between the cage and the vertebral body can be achieved by simple variation of its shape

Claims

1. A prosthetic cage for spine adapted to be implanted in an intervertebral disc space between two vertebral bodies in a spine and to accommodate fusion of the disc space, said cage being a tubular body with an internal aperture, an external surface of which being a plurality of wall apertures, each perpendicular to the longitudinal axis thereof and communicating with the internal aperture, and dual convex screw threads extended therefrom.

2. The prosthetic cage for spine of

claim 1

, wherein each inclined plane of said dual convex screw threads is oppositely directed.

3. The prosthetic cage for spine of

claim 2

, wherein the dual convex screw threads are spaced apart from each other and the wall apertures are also available between the dual convex screw threads.

4. The prosthetic cage for spine of one of

claims 1

to

3

, wherein a first end of the cage for introduction has a sharpened section for stimulating an intervertebral disc space