Holder for implantation and extraction of prosthesis

Patent metadata

Field	Value
Publication number	US-9301853-B2
Application number	US-201113081541-A
Country	US
Kind code	B2
Filing date	Apr 7, 2011
Priority date	Apr 9, 2010
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

Disclosed is an implant holder for an implant device comprising a locking mechanism that in a first position causes a clamp coupled to an implant device to lock such that the clamp cannot be decoupled from the implant device, and in a second position causes the clamp to unlock the implant device such that the clamp remains coupled to the implant device in the absence of a sufficient decoupling force but is decoupled from the implant device in the presence of a sufficient decoupling force. Also disclosed are methods of implanting an implant device using an implant holder by coupling the implant device to the implant holder, locking the implant device and the implant holder, emplacing the implant device utilizing the implant holder, unlocking the implant device and the implant holder such that the implant device is still coupled to the implant holder but can be decoupled with sufficient force.

First claim

What is claimed is:

1. An implant holder for an implant device, the implant holder comprising:
a clamp for coupling to and decoupling from the implant device, the clamp including:
a central body having an interface for coupling with the implant device; and
a stem extending from a proximal end of the central body, a proximal end of the stem including a stem mating feature;
the central body including a first arm and a second arm extending from the stem, the first arm and the second arm each including a central spacer portion having a thickness less than the thickness of each of the respective first and second arms, the central spacer portion sized and configured to abut at least one of an upper endplate and a lower endplate of the implant device, such that a longitudinal line of the upper endplate and the lower endplate of the implant device is maintained in a parallel configuration with respect to a longitudinal line of the clamp, the first arm and the second arm each including an exterior locking surface extending at an acute angle with respect to a longitudinal axis of the implant holder and a projection extending from and contained on the locking surface in a direction parallel to the longitudinal axis of the implant holder; and

a locking mechanism including:
a hollow sleeve having an opening at a distal end of the hollow sleeve, the opening sized and configured to translationally and rotationally receive at least a portion of the stem;
a clamp coupler attached to the distal end of the hollow sleeve, the clamp coupler including a pair of locking tines each defining a corresponding locking surface each sized and configured to mate with a corresponding one of the exterior locking surfaces of the central body, wherein said locking surfaces of the locking tines extend at an acute angle with respect to a longitudinal axis of the implant holder, the locking surfaces of the locking tines including recesses extending through the locking tines in a direction perpendicular to the longitudinal axis of the implant holder, the recesses sized and configured to mate with the corresponding projections extending from the exterior locking surfaces of the clamp; and
a shaft translationally and rotationally received within the hollow sleeve along a central axis of the implant holder, a distal end of the shaft including a shaft mating feature sized and configured to mate with the stem mating feature;

wherein the locking mechanism, in a first position, causes the central body to mate with the clamp coupler locking the clamp to the implant device such that the clamp cannot be decoupled from the implant device; and
wherein the locking mechanism, in a second position, causes the central body to be located apart from the clamp coupler unlocking the clamp from the implant device such that the clamp remains coupled to the implant device in the absence of a sufficient decoupling force but the clamp is decoupled from the implant device with the application of the sufficient decoupling force.

2. The implant holder of claim 1 wherein the stem mating feature comprises a threaded hole, and
wherein the shaft mating feature comprises a threaded post for engaging the threaded hole.

3. The implant holder of claim 1 wherein the decoupling force is a surgeon force.

4. The implant holder of claim 1 wherein the implant holder is comprised of a radio-opaque material, and
wherein the implant holder comprises an X-ray-visible reference point visible in an X-ray corresponding to the position of the implant device.

5. The implant holder of claim 4 wherein the X-ray-visible reference point comprises a channel located on a surface of the central body of the clamp.

6. The implant holder of claim 4 wherein the radio-opaque material is metal.

7. The implant holder of claim 1 further comprising a stop system including a stop rod for abutting an interior surface of the patient during insertion of the implant device.

8. The implant holder of claim 7 wherein the stop system is attachable to the locking mechanism.

9. The implant holder of claim 1 wherein the first arm and the second arm define a U-shaped interface for coupling with the implant,
wherein the first and second arms are coupled to the stem proximate a flexion hole.

10. The implant holder of claim 9 wherein the first and second arms are separated from each other by a lateral gap extending from the flexion hole to the distal end of the central body of the clamp.

11. The implant holder of claim 1 wherein the clamp coupler includes a terminus surface,
wherein the locking tines and the terminus surface are sized and configured to correspond to a proximal surface of the central body of the clamp.

12. An implant holder apparatus comprising:
a clamp for engaging an implant device such that the clamp remains coupled to the implant device until a sufficient decoupling force is applied to decoupled the implant device from the clamp, the clamp including:
a central body having an interface for coupling with the implant device; and
a stem extending from a proximate end of the central body, a proximate end of the stem including a stem mating feature;
the central body including a first arm and a second arm extending from the stem, the first arm and the second arm each including a central spacer portion having a thickness less than the thickness of each of the respective first and second arms, the central spacer portion sized and configured to abut at least one of an upper endplate and a lower endplate of the implant device, such that the upper endplate and the lower endplate are maintained in a parallel configuration when coupled to the clamp, the first arm and the second arm including a first pair of locking surfaces extending at an acute angle with respect to a longitudinal axis of the implant holder and a projection extending from and contained on each of the pair of locking surfaces in a direction parallel to the longitudinal axis of the implant holder;

a sleeve for locking and unlocking the clamp such that the implant device cannot be decoupled from the clamp when locked but can be decoupled from the clamp when unlocked and when a sufficient decoupling force is applied, the sleeve including:
a hollow body portion extending between a proximal end and a distal end,
an opening at the distal end sized and configured to translationally and rotationally receive at least a portion of the stem; and
a clamp coupler attached to the distal end sized and configured to mate with a proximal surface of the central body of the clamp, the clamp coupler including a pair of locking tines each defining a corresponding second pair of locking surfaces sized and configured to mate with a corresponding one of the projections extending from the first pair of locking surfaces; a shaft for selectively determining to lock or unlock the clamp, the shaft including
an elongated body portion sized and configured to be translationally and rotationally received within the hollow body portion of the sleeve along a central axis of the implant holder;
a shaft mating feature located at a distal end of the elongated body portion sized and configured to mate with the stem mating feature;

wherein the sleeve and the shaft are fixed with respect to each other in a longitudinal direction along the central axis of the implant holder;
wherein rotation of the shaft causes the shaft mating feature to engage the stem mating feature such that the stem is drawn into the hollow body portion of the sleeve and the clamp coupler is mated with the central body of the clamp, thereby locking the implant device at the clamp interface.

13. The apparatus of claim 12 wherein the c

Assignees

• Richter Joern
• Berger Roger
• Bertagnoli Rudolf
• Depuy Synthes Products Inc

Inventors

• Richter Joern
• Berger Roger
• Bertagnoli Rudolf

Classifications

• A61F2/4603

  for insertion or extraction of endoprosthetic joints or of accessories thereof · CPC title

• A61F2002/30845

  with cutting edges · CPC title

• A61F2/4611 Primary

  of spinal prostheses · CPC title

• A61F2002/443

  having two transversal endplates and at least one intermediate component · CPC title

• A61F2310/00796

  Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite · CPC title