Insertion instruments and method for delivering a vertebral body spacer

• US 6,159,215 A
• Filed: 12/18/1998
• Issued: 12/12/2000
• Est. Priority Date: 12/19/1997
• Status: Expired due to Term

• Current Assignee: Depuy Acromed Incorporated (Johnson & Johnson)
• Original Assignee: Depuy Acromed Incorporated (Johnson & Johnson)
• Inventors: Rhoades, Joel C., Davison, Dale G., Camino, Thomas, Luczak, James C., Danylchuk, Kenneth, Moskovich, Ronald, Urbahns, David J.
• Primary Examiner(s): Smith, Jeffrey A.
• Application Number:
  US09/216,440
• Time in Patent Office: 725 Days
• Field of Search: 606/99, 606/86, 623/17, 623/17.11
• US Class Current: 606/86.00R
• CPC Class Codes: A61B 17/0206 with antagonistic arms as supports for retractor elements
• CPC Class Codes: A61B 17/025 Joint distractors
• CPC Class Codes: A61B 2017/0256 for the spine
• CPC Class Codes: A61F 2/44 for the spine, e.g. vertebrae, spinal discs
• CPC Class Codes: A61F 2/442 Intervertebral or spinal discs, e.g. resilient non-disc-shaped intervertebral inflatable pockets A61F2/441; non-disc-shaped intervertebral fusion implants A61F2/4455
• CPC Class Codes: A61F 2/4465 having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine
• CPC Class Codes: A61F 2/4603 for insertion or extraction of endoprosthetic joints or of accessories thereof
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2/4684 Trial or dummy prostheses
• CPC Class Codes: A61F 2002/30593 hollow
• 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 spacer-insertion instrument for delivering a spacer to a spine is disclosed. The instrument includes a handle portion and a guide coupled to the handle portion. The instrument further includes a shaft coupled to the handle portion and extending along the guide. The instrument further includes a tip including an attachment end portion coupled to the shaft and opposing fingers movable relative to one another and adapted to grasp the spacer when the shaft is moved to actuate the fingers. The handle portion includes a grip and a trigger coupled to the grip and to the shaft and movement of the trigger toward the grip causes the fingers to move toward one another. A method for delivering a vertebral body spacer to a disc space formed in a spine between adjacent vertebral bodies is also disclosed.

Claims

1. A spacer-insertion instrument for delivering a spacer to a spine, comprising:

a handle portion,

a guide coupled to the handle portion,

a shaft coupled to the handle portion and extending along the guide, and

a tip including an attachment end portion coupled to the shaft and opposing fingers movable relative to one another and adapted to grasp the spacer when the shaft is moved to actuate the fingers,

wherein each finger includes an interior surface and an exterior surface and the interior surfaces cooperate to define a space sized to receive the spacer therein, and

wherein each finger includes a tooth extending into the space.

2. A spacer-insertion instrument for delivering a spacer to a spine, comprising:

a handle portion,

a guide coupled to the handle portion,

a shaft coupled to the handle portion and extending along the guide, and

a tip including an attachment end portion coupled to the shaft and opposing fingers movable relative to one another and adapted to grasp the spacer when the shaft is moved to actuate the fingers,

wherein each finger includes an interior surface and an exterior surface and the interior surfaces cooperate to define a space sized to receive the spacer therein, and

wherein each finger includes two spaced-apart teeth extending into the space.

3. A spacer-insertion instrument for delivering a spacer to a spine, comprising:

a handle portion,

a guide coupled to the handle portion,

a shaft coupled to the handle portion and extending along the guide, and

a tip including an attachment end portion coupled to the shaft and opposing fingers movable relative to one another and adapted to grasp the spacer when the shaft is moved to actuate the fingers,

wherein the handle portion includes a grip and a trigger coupled to the grip and to the shaft and movement of the trigger toward the grip causes the fingers to move toward one another.

4. The apparatus of claim 3, wherein the tip includes a central portion extending between the attachment end portion and the fingers.

5. The apparatus of claim 4, wherein the central portion is formed to include a slot.

6. The apparatus of claim 5, wherein the slot includes a closed end and an open end adjacent to the fingers.

7. The apparatus of claim 6, wherein each finger includes a fixed end coupled to the central portion and an opposite free end and the fixed ends cooperate to define the open end of the slot.

8. The apparatus of claim 4, wherein each finger includes an interior surface and an exterior surface and the interior surfaces cooperate to define a space sized to receive the space therein.

9. The apparatus of claim 8, wherein the interior surfaces are generally concave in shape.

10. The apparatus of claim 3, wherein the handle portion includes a lock coupled to the grip and the lock is formed to limit movement of the trigger away from the grip.

11. The apparatus of claim 10, wherein the lock includes teeth that cooperate with the trigger to permit movement of the trigger toward the grip.

12. The apparatus of claim 3, wherein the guide includes an inner portion coupled to the handle portion and an outer end portion and the tip is coupled to the shaft and extends away from the outer end portion.

13. A vertebral body insertion kit, the kit comprising:

a spanner including a handle portion having opposite ends and a notched portion formed at one of the ends, the notched portion having a pre-determined dimension and sized for extension into a space formed in a spine,

a spacer having a dimension approximately equal to the dimension of the notched portion, and

a spacer-insertion apparatus comprising a handle portion, a guide coupled to the handle portion, a shaft coupled to the handle portion and extending along the guide, and a tip including an attachment end portion coupled to the shaft and opposing fingers movable relative to one another and adapted to grasp the spacer when the shaft is moved relative to the guide.

14. The kit of claim 13, further comprising a trial including a rod and a disc portion coupled to the rod, the disc portion having a height approximately equal to the dimension of the spacer.

15. The kit of claim 13, further comprising a facilitator formed to include two guides that cooperate to define a passageway therebetween and the spacer is formed for movement between the guides.

16. The kit of claim 15, wherein the facilitator includes top and bottom plates coupled to the respective guides and a jack mechanism positioned to lie between the top and bottom plates.

17. The apparatus of claim 13, wherein each finger includes an interior surface and an exterior surface and the interior surfaces cooperate to define a space sized to receive the spacer therein.

18. The apparatus of claim 17, wherein each finger includes at least one tooth extending into the space.

19. A method for delivering a vertebral body spacer to a disc space formed in a spine between adjacent vertebral bodies, the method comprising the steps of:

selecting a spacer,

providing a spacer-insertion apparatus having (i) a handle portion which includes a grip and a trigger, (ii) a shaft coupled to the trigger of the handle portion, and (iii) a tip coupled to the shaft, the tip including an attachment end portion coupled to the shaft and opposing fingers movable relative to one another,

placing the fingers about the spacer,

moving the trigger toward the grip so as to cause the fingers to move toward the spacer to couple the tip and the spacer together,

inserting the tip and the spacer into the disc space,

moving the trigger away from the grip so as to cause the fingers to move away from the spacer to release the spacer within the disc space, and

withdrawing the fingers from the disc space.