Bone screw

• US 20040015172A1
• Filed: 07/10/2002
• Published: 01/22/2004
• Est. Priority Date: 11/10/2000
• Status: Active Grant

• Current Assignee: Biedermann Technologies GmbH & Co. KG
• Original Assignee: Biedermann Technologies GmbH & Co. KG
• Inventors: Lindsey, Robert W., Biedermann, Lutz, Harms, Jurgen
• Granted Patent: US 8,137,389 B2
• Time in Patent Office: Days
• US Class Current: 606/73
• CPC Class Codes: A61B 17/8615 at the central region of the screw head
• CPC Class Codes: A61B 17/863 with thread interrupted or changing its form along shank, other than constant taper
• CPC Class Codes: A61B 17/8635 Tips of screws
• CPC Class Codes: A61B 17/864 hollow, e.g. with socket or cannulated
• CPC Class Codes: A61B 17/8685 comprising multiple separate parts
• CPC Class Codes: A61B 17/869 characterised by an open form, e.g. wire helix

Abstract

A bone screw is created, with a thread section (1) with a tip (6) at a first end and a head (8) for engaging with a screwdriver at the opposite second end, which serves as traction element to connect shattered or split off parts of bones to one another. So that fusion of the screw with the bones can take place, the thread section (1) is constructed as tubular and its wall has a plurality of recesses.

Claims

1. Bone screw with a thread section (1) constructed as a tube, a tip (6, 12) at a first end and a head (8) for engaging with a screwdriver at the opposite second end, wherein the wall of the thread section (1) has a plurality of recesses (2, 3), characterised in that the tubular thread section (1) has a bone thread (4) on its outer wall and at least at one end an inner thread section for screwing in the head (8) or tip (6, 12).

2. Bone screw according to claim 1, characterised in that the inner thread section is constructed as a metric thread (5).

3. Bone screw according to claim 1 or 2, characterised in that the tip (12) is constructed as a self-cutting tip.

4. Bone screw according to one of claims 1 to 3, characterised in that the inner thread extends over the entire length of the thread section (1).

5. Bone screw with a thread section (1) constructed as a tube, a tip (12) at a first end and a head (8) for engaging with a screwdriver at the opposite second end, wherein the wall of the thread section (1) has a plurality of recesses (2, 3), characterised in that the tubular thread section (1) has a bone thread (4) on its outer wall and the tip (12) is constructed as a self-cutting tip.

6. Bone screw according to claim 5, characterised in that the thread section at least at one end has an inner thread section for screwing in the head (8) or the tip (6, 12).

7. Bone screw with a thread section (1) constructed as a tube, a tip (12) at a first end and a head (8) for engaging with a screwdriver at the opposite second end, wherein the wall of the thread section (1) has a plurality of recesses (2, 3), characterised in that the tubular thread section (1) has a bone thread (4) on its outer wall and the head (8) and/or the tip (6, 12) are so dimensioned that they can be inserted to fit snugly into the ends of the thread section (1).

8. Bone screw according to claim 7, characterised in that the tip (12) is constructed as a self-cutting tip.