BONE SCREW

• US 20120150237A1
• Filed: 06/08/2010
• Published: 06/14/2012
• Est. Priority Date: 06/08/2009
• Status: Abandoned Application

• Current Assignee: Z-Medical GmbH & Co. KG
• Original Assignee: Z-Medical GmbH & Co. KG
• Inventors: Combrowski, Zbigniew
• Application Number:
  US13/376,815
• Publication Number:
  US 20120150237A1
• Time in Patent Office: Days
• US Class Current: 606/301
• 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 17/8615 at the central region of the screw head
• CPC Class Codes: A61B 17/862 at the periphery 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 17/888 the driver bit acting on the central region of the screw head
• CPC Class Codes: A61B 17/8883 the driver bit acting on the periphery of the screw head
• CPC Class Codes: A61B 17/8888 at its central region
• CPC Class Codes: A61B 17/8891 at its periphery
• CPC Class Codes: A61B 2090/037 with a frangible part, e.g. by reduced diameter

Abstract

The invention relates to a surgical instrument comprising a bone screw (1) having a screw head (5), and a shaft (2) for rotating the bone screw in a bone, the shaft and/or head forming a single element with the bone screw and having a predetermined breaking point (4). A driving element is inserted into the bone screw by the shaft, said driving element screwing the screw further in or out once the shaft has broken off from the screw.

Claims

1. Surgical instrument with

a bone screw (1) with a screw head (5), and

a shaft (2) for rotating the bone screw (1) in a bone,

is characterized in that,

the shaft (2) is designed with the bone screw (1) as single part.

2. Surgical instrument as per claim 1 is characterized in that, the shaft 2 is shaped as grip.

3. Surgical instrument as per claim 1 or 2 is characterized in that, between the shaft (2) and the screw head (5) of the bone screw (1) a predetermined breaking point (4) is provided.

4. Surgical instrument as per claim 1 or 2 is characterized in that, the predetermined breaking point (4) is arranged in an annular depressed recess of the screw head (5).

5. Surgical instrument as per one of the previous claims is characterized in that, the screw head (5) presents an inner serration (50).

6. Surgical instrument as per one of the previous claims is characterized in that, the shaft (2) presents a bore in longitudinal direction, through which in the screw head (5) an inner drive (49) can be introduced with the inner serration (50) of the shaft (2).

7. Surgical instrument as per one of the previous claims is characterized in that, the drive (49) presents a counter bore (48) in screw head (5).

8. Surgical instrument as per one of the previous claims is characterized in that, the shaft (2) presents a connector (51), which is suitable to co-act with a knob (41) or a rod (37).

9. Surgical instrument as per claim 8 is characterized in that, the rod (37) co-acts with the knob (41).

10. Knob for usage with a surgical element as per claims 1 to 9 is characterized in that, the knob (41) is connected in a separable manner with the surgical element.

11. Knob as per claim 10 is characterized in that, the knob is with multiple parts for connection with the shaft.

12. Knob as per claim 10 or 11 is characterized in that the multi-part knob (41) can be drawn out in longitudinal.

13. Bone screw for usage as part of a surgical element as per the claims 1 to 9 is characterized in that, the threading (6, 52) is designed with single groove or multiple grooves.

14. Bone screw as per claim 13 is characterized in that, the bone screw (1) presents a channel (47) running through the interior, which is suitable to co-act through a channel (46) in the shaft (2), in doing so, a opening is present in the screw head (5), which co-acts with another opening of the shaft (2).

15. Bone screw as per claim 14 is characterized in that, the channel (47) comprises cross-holes, which run from channel (47) to the outer surface and are suitable to accommodate and to guide an active substance or a filler material.