BONE SCREW

• US 20100298889A1
• Filed: 04/19/2010
• Published: 11/25/2010
• Est. Priority Date: 10/12/1999
• Status: Active Grant

• Current Assignee: Biedermann Technologies GmbH & Co. KG
• Original Assignee: Biedermann Technologies GmbH & Co. KG
• Inventors: Wilberg, Lothar, Eberlein, Roland
• Granted Patent: US 8,382,808 B2
• Time in Patent Office: Days
• US Class Current: 606/305
• CPC Class Codes: A61B 17/00491 Surgical glue applicators surgical adhesives A61L24/00; two-component delivery syringes A61M5/19
• CPC Class Codes: A61B 17/7098 wherein the implant is permeable or has openings, e.g. fenestrated screw hollow surgical screws A61B17/864
• CPC Class Codes: A61B 17/864 hollow, e.g. with socket or cannulated

Abstract

A bone screw has a screw head and a threaded shank. An axial bore into which a plurality of radial bores set at a distance from each other open, extends through the threaded shaft. The axial bore is open at the screw head side end, and the radial bores are also open at the radially outer end. The axial bore is closed in an axial direction in the area of the end of the screw shank that lies opposite the screw head.

Claims

1. Bone screw, comprising a screw head (16) and a threaded shank (18), wherein an axial bore (26) into which a plurality of radial bores (32) set at a distance from each other open, extends through the threaded shank (18), wherein said axial bore (26) is open at the screw head side end (28) and wherein the radial bores (32) are also open at the radially outer end, characterized in that the axial bore (26) is closed in an axial direction in the area of the end (30) of the threaded shank that is located opposite the screw head (16).

2. Bone screw according to claim 1, characterized in that an aperture cross-section of the various radial bores (32) is increasing towards the end (30) of the threaded shank (18) that is located opposite the screw head (16).

3. Bone screw according to claim 1 or 2, characterized in that an adapter (34) is provided, wherein said adapter (34) can be fitted onto the screw head (16) and comprises an axial bore (40) aligned with the axial bore (26) of the threaded shank (18) when the adapter (34) is in the fitted state and comprises a holder (42) for taking up a lower syringe or cartridge end in a tight manner.

4. Bone screw according to claim 3, characterized in that the adapter (34) is made of a plastic material.

5. Bone screw according to claim 3 or 4, characterized in that the screw head (16) comprises a holder (21) and that a lower end (36) of the adapter (34) is designed complementarily with the holder (21).

6. Bone screw according to anyone of claims 3 to 5, characterized in that the adapter (34) comprises a circumferential shoulder (48) that is supported on the screw head (16) when the adapter (34) is in the fitted state.

7. Bone screw according to anyone of claims 3 to 6, characterized in that the holder (42) of the adapter (34) comprises a circumferential shoulder (50) for taking up the lower syringe or cartridge end.

8. Bone screw according to anyone of claims 1 to 7, characterized in that the axial bore (26) in the threaded shank (18) comprises at least one eccentric radial extension (62, 64) that extends over the length of the axial bore (26).

9. Bone screw according to claim 8, characterized in that the radial bores (32) open into the eccentric extension (62, 64) of the bore (26).

10. Bone screw according to anyone of claims 1 to 9, characterized in that the radial bores (32) are uniformly distributed both in axial and in circumferential direction.

11. Bone screw according to anyone of claims 1 to 10, characterized in that the radial bores (32) end between the thread flanks (24) of the threaded shank (18).