Orthopedic screw fastener system

• US 20090018588A1
• Filed: 12/18/2007
• Published: 01/15/2009
• Est. Priority Date: 12/19/2006
• Status: Active Grant

• Current Assignee: Zrinski GmbH (Beijing Naton Technology Group Company Limited)
• Original Assignee: Zrinski AG (Beijing Naton Technology Group Company Limited)
• Inventors: Eckhof, Stephan, Zrinski, Davor, Zrinski, Josef, Maier, Rolf, Altermann, Frank, Reiter, Zoran
• Granted Patent: US 8,506,607 B2
• Time in Patent Office: Days
• US Class Current: 606/280
• CPC Class Codes: A61B 17/8057 the interlocking form comprising a thread

Abstract

An orthopedic screw fastener system, includes at least one screw, consisting in each case of a screw head and of a screw shank, the screw head being provided with a thread, and at least one plate with a thickness, provided with at least one through-bore which is able to receive a screw. The plate has a through-opening, formed by at least two through-bores, each through-bore being defined by a midpoint and by a radius, and the through-bores are offset relative to each other and intersect each other in such a way that intersection lines and/or intersection surfaces form, which extend into the depth of the through-opening.

Claims

1. An orthopedic screw fastener system, comprising

at least one screw, comprising in each case a screw head and of a screw shank, the screw head being provided with a thread,

and

at least one plate, which has a suitable thickness, provided with at least one through-bore which is able to receive the screw,

wherein

the plate has a through-opening, formed by at least two through-bores, each through-bore being defined by a midpoint and by a radius,

the through-bores are offset relative to each other and intersect each other in such a way that intersection lines and/or intersection surfaces form, which extend into the depth of the through-opening.

2. The screw fastener system as claimed in claim 1, wherein the intersection surfaces and/or intersection surfaces extend in the longitudinal direction of the through-bores.

3. The screw fastener system as claimed in claim 1, wherein the midpoints of the through-bores are arranged on a common arc of a circle.

4. The screw fastener system as claimed in claim 1, wherein, in the case of three or more through-bores, these are offset relative to one another in such a way that each through-bore intersects all the other through-bores at least once.

5. The screw fastener system as claimed in claim 1, wherein at least one through-bore has a conical shape.

6. The screw fastener system as claimed in claim 5, wherein the through-bores narrow in the screwing-in direction.

7. The screw fastener system as claimed in claim 5, wherein, in the screwing-in direction of the through-opening, intersection lines are first provided, which merge into intersection surfaces.

8. The screw fastener system as claimed in claim 1, wherein a through-opening can be produced by producing a central bore with a radius about a midpoint M, and subsequent further through-bores that are arranged like a cloverleaf around the central bore.

9. The screw fastener system as claimed in claim 1, wherein the screw head is conical and narrows toward the screw shank.

10. An orthopedic plate, in particular a bone plate, comprising a plate-like main element and a through-bore provided in the main element, wherein

the plate has a through-opening, formed by at least two through-bores, each through-bore being defined by a midpoint and by a radius,

the through-bores are offset relative to each other and intersect each other in such a way that intersection lines and/or intersection surfaces form, which extend into the depth of the through-opening.

11. The plate as claimed in claim 10, wherein the respective midpoint of the through-bore is arranged on a common circle.

12. The plate as claimed in claim 10, wherein the respective through-bore has a conicity.

13. The plate as claimed in claim 12, wherein the through-bore narrows in the screwing-in direction.