Forceps for inserting intervertebral device

• US 5,122,130 A
• Filed: 10/25/1990
• Issued: 06/16/1992
• Est. Priority Date: 03/23/1988
• Status: Expired due to Term

• Current Assignee: Waldemar Link GmbH & Co. KG
• Original Assignee: Waldemar Link GmbH & Co. KG
• Inventors: Keller, Arnold
• Primary Examiner(s): Hindenburg, Max
• Assistant Examiner(s): Dawson, Glenn K.
• Application Number:
  US07/603,897
• Time in Patent Office: 600 Days
• Field of Search: 606/60, 606/61, 606/63, 606/64, 606/99, 606/205, 606/206, 606/207, 606/208, 606/209, 81/302, 81/312, 81/318, 81/319, 81/320, 81/321, 81/322, 81/323, 81/DIG. 6
• US Class Current: 606/86.00A
• CPC Class Codes: A61B 17/025 Joint distractors
• CPC Class Codes: A61B 17/2804 with two or more pivotal connections A61B17/29 takes precedence
• CPC Class Codes: A61B 2017/0256 for the spine
• CPC Class Codes: A61F 2/4425 made of articulated components
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/30642 having a single rolling (or sliding) ball articulating between two cups
• CPC Class Codes: A61F 2002/30663 multiaxial, e.g. biaxial; multipolar, e.g. bipolar or having an intermediate shell articulating between the ball and the socket
• CPC Class Codes: A61F 2002/3082 Grooves
• CPC Class Codes: A61F 2002/30841 Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• CPC Class Codes: A61F 2002/30892 parallel
• CPC Class Codes: A61F 2002/443 having two transversal endplates and at least one intermediate component
• CPC Class Codes: A61F 2002/4622 having the shape of a forceps or a clamp
• CPC Class Codes: A61F 2002/4627 with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument
• CPC Class Codes: A61F 2002/4628 with linear motion along or rotating motion about an axis transverse to the instrument axis or to the implantation direction, e.g. clamping

Abstract

A spreading forceps (9) which has, at its front end on each spreading jaw (10, 11), an essentially U-shaped recess surrounding one stop plate on three sides and gripping the edge, the thickness of the spreading jaws (10, 11) in the spreading direction being essentially identical to the thickness of the stop plates (FIG. 1). The spreading forceps is useful for the insertion of intervertebral endoprostheses.

Claims

1. A surgical forceps for applying pressure against a vertebral body, said forceps having a back portion and a front portion including a front end, the front portion being formed as first and second spreading jaws that are substantially parallel when in a spread position, each spreading jaw having a substantially U-shaped recess having an open portion directed towards front end of the forceps, each U-shaped recess being defined in a plane substantially parallel to the other jaw and perpendicular to the spreading direction and including an inner wall having a groove arranged in a plane substantially perpendicular to the spreading direction.

2. A surgical forceps according to claim 1, wherein at least one groove has bevelled side walls.

3. A surgical forceps according to claim 1, wherein the spreading jaws are connected to scissor-like first and second levers, the levers being connected to the spreading jaws such that the spreading jaws move apart when the first and second levers move toward each other.

4. A surgical forceps according to claim 3, wherein the surgical forceps have a detachable notched device for holding a selected spread position of the spreading jaws, the notched device being connected to the first and second levers.

5. A surgical forceps according to claim 1, wherein the surgical forceps are provided, in the area of the spreading jaws, with means defining a contact surface for engaging a substantially rod-shaped driving-in instrument.

6. A surgical forceps according to claim 1, wherein the inner wall of each U-shaped recess includes a center portion and two leg portions, and each groove includes a pair of grooves formed on the leg portions.

7. A surgical forceps for applying pressure against a vertebral body, said forceps having a back portion and a front portion including a front end, the front portion being formed as first and second spreading jaws, each spreading jaw having a substantially U-shaped recess defined in a plane substantially parallel to the other jaw and perpendicular to the spreading direction, the U-shaped recess having an opening in the direction of the front end and having a groove arranged in a plane substantially perpendicular to the spreading direction and parallel to the U-shaped recess, wherein at least one groove has bevelled side walls.

8. A surgical forceps according to claim 7, wherein on each spreading jaw, a resiliently yielding catch is provided at the front end of the forceps proximate the groove.

9. A surgical forceps according to claim 7, wherein the spreading jaws are connected to scissor-like first and second levers, the levers being connected to the spreading jaws such that the spreading jaws move apart when the first and second levers move toward each other.

10. A surgical forceps according to claim 9, wherein the surgical forceps have a detachable notched device for holding a selected spread position of the spreading jaws, the notched device being connected to the first and second levers.

11. A surgical forceps according to claim 7, wherein the surgical forceps are provided, in the area of the spreading jaws, with means defining a contact surface for engaging a substantially rod-shaped driving-in instrument.

12. A surgical forceps according to claim 7, wherein each U-shaped recess includes a center portion and two leg portions, and each groove includes a pair of grooves formed on the leg portions.

13. A surgical forceps for applying pressure against a vertebral body, said forceps having a back portion, and a front portion including a front end, the front portion comprising two opposed, elongated substanially parallel spreading jaws, each jaw having a substantially U-shaped recess including an inner wall having a groove, the recess and groove being defined in a plane perpendicular to the spreading direction, the recess being open in the direction of the front end of the forceps.

14. A surgical forceps according to claim 13, wherein at least one groove has bevelled side walls.

15. A surgical forceps according to claim 13, wherein on each spreading jaw, a resiliently yielding catch is provided at the front end of the forceps proximate the groove.

16. A surgical forceps according to claim 13, wherein the spreading jaws are connected to scissor-like first and second levers, the levers being connected to the spreading jaws such that the spreading jaws move apart when the first and second levers move toward each other.

17. A surgical forceps according to claim 16, wherein the surgical forceps have a detachable notched device for holding a selected spread position of the spreading jaws, the notched device being connected to the first and second levers.

18. A surgical forceps according to claim 13, wherein the surgical forceps are provided, in the area of the spreading jaws, with means defining a contact surface for engaging a substantially rod-shaped driving-in instrument.

19. A surgical forceps for applying pressure against a vertebral body, the forceps having a back portion and a front portion including a front end, the front portion being formed as first and second substantially parallel spreading jaws, each spreading jaw having a substantially U-shaped recess defined in a plane substantially parallel to the other jaw and perpendicular to the spreading direction, the U-shaped recess including an open portion directed towards the front end of the forceps, wherein each jaw has a resiliently yielding catch at the front end of the forceps.

20. A surgical forceps according to claim 19, wherein the spreading jaws are connected to scissor-like first and second levers, the levers being connected to the spreading jaws such that the spreading jaws move apart when the first and second levers move toward each other.

21. A surgical forceps according to claim 20, wherein the surgical forceps have a detachable notched device for holding a selected spread position of the spreading jaws, the notched device being connected to the first and second levers.