Orthopedic surgical holding device

• US 5,713,898 A
• Filed: 01/29/1996
• Issued: 02/03/1998
• Est. Priority Date: 05/18/1993
• Status: Expired due to Term

• Current Assignee: Depuy Spine Sarl (Johnson & Johnson)
• Original Assignee: Schafer micomed GmbH
• Inventors: Schafer, Bernd, Rehder, Gunther, Stucker, Ralf
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): Woo, Julian W.
• Application Number:
  US08/545,575
• Time in Patent Office: 736 Days
• Field of Search: 411/103, 411/104, 411/105, 411/108, 411/109, 411/110, 606/61, 606/60, 606/69, 606/72, 606/73
• US Class Current: 606/60
• CPC Class Codes: A61B 17/7032 Screws or hooks with U-shaped head or back through which longitudinal rods pass
• CPC Class Codes: A61B 17/7043 with a longitudinal element fixed to one or more transverse elements which connect multiple screws or hooks
• CPC Class Codes: A61B 17/7044 also having plates, staples or washers bearing on the vertebrae

Abstract

In an orthopedic surgical holding device for a correcting rod, having a bone plate which can be fastened on the bone, a receiver device for the correcting rod and a fixing device maintaining the correcting rod in the receiver device. An optimal transfer of the occurring forces and moments is achieved in that the bone plate can be fixed independently of the receiver device (10) and has a bearing for the receiver device, and in that the receiver device can be pushed into the bearing from the proximal side and in the course of this extends through the bone plate and extends beyond it on the distal side for receiving the correcting rod.

Claims

1. An orthopedic surgical holding device for a correcting rod, comprising:

a bone plate for fastening onto a bone, said bone plate defining a proximal side, a distal side and a center line;

a receiver device mounted to said bone plate for receiving the correcting rod, said receiver device having a collar and a outer surface on its end; and

a fixing device mounted to said receiver device for maintaining the correcting rod in said receiver device,

wherein said bone plate includes a bearing which engages said receiver device such that said receiver device extends through said bearing from said proximal side beyond said distal side of said bone plate where it receives the correcting rod, such that said outer surface assumes a position that is one of a recessed position relative to said proximal side and a flush position relative to said proximal side, and such that said bone plate can be fixed to the bone independently of said receiver device.

2. The orthopedic surgical holding device as defined in claim 1, wherein said receiver device is rotatably disposed in said bearing.

3. The orthopedic surgical holding device as defined in claim 1, wherein said bone plate defines a through opening through which said receiver device extends and about which said bearing is mounted;

and wherein said receiver device is maintained radially immovable in said through opening.

4. The orthopedic surgical holding device as defined in claim 3, wherein said receiver device is disposed relative to said bearing with crosswise play, and wherein said receiver device can be pushed crosswise in one direction in said bearing.

5. The orthopedic surgical holding device as defined in claim 4, wherein said through opening is in the shape of an elongated hole, and said bearing is also embodied in the shape of an elongated hole, and wherein said receiver device is maintained in said bearing in a crosswise movable manner.

6. The orthopedic surgical holding device as defined in claim 1, wherein said bone plate defines a recess extending from said proximal side to said distal side, and wherein said collar is disposed in said recess and terminates in a recessed manner relative to said proximal side.

7. The orthopedic surgical holding device as defined in claim 1, wherein said bone plate includes a plurality of bearings associated with a respective one of a plurality of receiver devices.

8. The orthopedic surgical holding device as defined in claim 1, wherein said receiver device is embodied as a fork head and said collar is a radially projecting collar disposed at one end of said receiver device which is received in said bone plate and engages said bearing at least partially.

9. The orthopedic surgical holding device as defined in claim 1, further comprising:

a coupling ring for receiving said receiver device.

10. The orthopedic surgical holding device as defined in claim 9, wherein said coupling ring is mounted on the distal side of said bone plate, and wherein the face of said coupling ring facing said distal side of said bone plate includes radial front serrations enclosing said bearing.

11. The orthopedic surgical holding device as defined in claim 9, wherein said coupling ring defines a distal side which has a diagonal groove for receiving the correcting rod.

12. The orthopedic surgical holding device as defined in claim 11, wherein the correcting rod is provided with longitudinal grooves, wherein said diagonal groove is provided with longitudinal notches free of undercuts into which the correcting rod is inserted, and wherein said longitudinal grooves correspond to said longitudinal notches.

13. The orthopedic surgical holding device as defined in claim 1, further comprising:

an intermediate ring which receives said receiver device.

14. The orthopedic surgical holding device as defined in claim 13, wherein said coupling ring defines a proximal side, and wherein said intermediate ring is disposed between said distal side of said bone plate and said proximal side of said coupling ring.

15. The orthopedic surgical holding device as defined in claim 13, wherein the surface of said intermediate ring resting against said bone plate and said distal side of said bone plate each have a front serration which enclose said bearing, wherein said bearing is in the shape of an elongated hole, and wherein said front serrations are respectively formed by parallel notches extending crosswise to the longitudinal extension of said bearing.

16. The orthopedic surgical holding device as defined in claim 12, wherein the surface of said intermediate ring resting against said coupling ring and said proximal side of said coupling ring are each provided with radial front serrations.

17. The orthopedic surgical holding device as defined in claim 13, further comprising:

a connection fixed against relative rotation but axially movable is provided between said receiver device and said coupling ring.

18. The orthopedic surgical holding device as defined in claim 17, further comprising:

a pin, wherein said receiver device includes at least a circumferentially arranged axial groove, wherein said coupling ring includes a radial bore, and wherein said axial groove is engaged by said pin which extends through said radial bore of said coupling ring.

19. The orthopedic surgical holding device as defined in claim 1, wherein said fixing device includes a head nut, said receiver device is embodied as a fork head and said head nut is adapted to be screwed on to said fork head.

20. The orthopedic surgical holding device as defined in claim 19, further comprising:

a fixing screw to coaxially engage said head nut, said fixing screw having at least one of a hexagon socket and a cup point.

21. The orthopedic surgical holding device as defined in claim 1, wherein said bone plate has at least two fastening bores located opposite to one another for receiving a respective bone screw.

22. The orthopedic surgical holding device as defined in claim 21, wherein one of said fastening bores extend obliquely relative to the center line of said bone plane so that the bone screw received therein extends in a direction to converge with the bone screw received in the opposite one of said fastening bores.

23. The orthopedic surgical holding device as defined in claim 21, wherein each fastening bore includes a cup-shaped bearing for the screw head of its respective bone screw.