Minimally invasive cup impactor

• US 7,335,207 B1
• Filed: 11/26/2003
• Issued: 02/26/2008
• Est. Priority Date: 11/26/2003
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Smith, Aaron
• Primary Examiner(s): Robert; Eduardo C.
• Assistant Examiner(s): SWIGER III, JAMES L
• Application Number:
  US10/722,627
• Time in Patent Office: 1,553 Days
• Field of Search: 606 79- 81, 606/91, 606/99, 606/100, 623 2221- 2239
• US Class Current: 606/99
• CPC Class Codes: A61F 2/34 Acetabular cups
• CPC Class Codes: A61F 2/4609 of acetabular cups
• CPC Class Codes: A61F 2002/30523 by means of meshing gear teeth
• CPC Class Codes: A61F 2002/30563 having elastic means or damping means, different from springs, e.g. including an elastomeric core or shock absorbers
• CPC Class Codes: A61F 2002/30635 Cardan or gimbal joints
• CPC Class Codes: A61F 2002/30787 inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/30841 Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• CPC Class Codes: A61F 2002/30894 inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/3401 with radial apertures, e.g. radial bores for receiving fixation screws
• CPC Class Codes: A61F 2002/3403 Polar aperture
• CPC Class Codes: A61F 2002/3412 with pins or protrusions, e.g. non-sharp pins or protrusions projecting from a shell surface
• CPC Class Codes: A61F 2002/4629 connected to the endoprosthesis or implant via a threaded connection
• CPC Class Codes: A61F 2002/4635 using minimally invasive surgery
• CPC Class Codes: A61F 2002/4681 by applying mechanical shocks, e.g. by hammering
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements

Abstract

A method and apparatus for implanting a prosthetic through a less invasive procedure. Generally, an instrument is provided to allow for a torque transfer along a non-linear line. Therefore, an incline can be provided without obstructing the view of a user using the instrument.

Claims

1. An instrument for implanting a prosthetic into a selected portion of a body, comprising:

a prosthetic engaging portion operable to selectively engage the prosthetic and extending along a first axis;

a graspable portion extending from said prosthetic engaging portion; and

a rotatable torque transfer system to transfer rotational torque from a second axis to said first axis, said torque transfer system rotates independently of said graspable portion;

wherein said first axis intersects said second axis;

wherein said torque transfer system includes at least a first portion extending along said first axis and extending from said prosthetic engaging portion and a second portion extending along said second axis;

wherein said prosthetic engaging portion is operable to at least one of engage and disengage the prosthetic via said torque transfer system.

2. The instruments of claim 1, further comprising:

an extending portion extending from said prosthetic engaging portion and operable with said torque transfer system;

wherein said extending portion extends at an angle relative to said prosthetic engaging portion and substantially defines said second axis.

3. The instrument of claim 1, wherein said prosthetic engaging portion includes a rotatable threaded member;

wherein said torque transfer system is able to transfer a torque to said rotatable threaded member to rotate said rotatable threaded member to at least one of engage and disengage the prosthetic.

4. The instrument of claim 1, further comprising:

a strikeable portion;

wherein said strikeable portion extends from said graspable portion to be struck by a selected instrument;

wherein said graspable portion extends along said first axis.

5. The instrument of claim 1, further comprising:

an acetabular cup operable to be disengaged from said prosthetic engaging portion after implantation into the selected portion of the body.

6. The instrument of claim 1, further comprising:

an intermediate portion generally parallel to said first axis and spaced therefrom; and

an extending member extending from at least one of said prosthetic engaging portion and said graspable portion to substantially interconnect said intermediate portion and the at least one of said prosthetic engaging portion and said graspable portion.

7. The instrument of claim 1, wherein said prosthetic engaging portion is disposed distally from said graspable portion.

8. The instrument of claim 7, wherein said prosthetic engaging portion is positionable through an incision formed in a dermas while said graspable portion extends to an exterior of the dermas, such that the prosthetic engaging portion is manipulatable with said graspable portion while said prosthetic engaging portion is internally disposed relative to the dermas.

9. The instrument of claim 7, wherein said torque transfer system is disposed adjacent to said prosthetic engaging portion near a distal end of the instrument;

wherein said torque transfer system is disposed a distance from said graspable portion.

10. The instrument of claim 9, further comprising:

a torqueing instrument positionable relative to said torque transfer system to provide torque to said torque transfer system;

wherein said torqueing instrument is positioned near a distal end of the instrument.

11. An apparatus for providing an implant to a selected area of a body, comprising:

a graspable portion able to transfer a force to an implant engaging portion along a first axis;

an intermediate portion interconnecting said graspable portion and said implant engaging portion, wherein at least a portion of said intermediate portion is spaced a distance from said first axis;

an angled portion of said intermediate portion extends along a second axis that intersects said first axis;

a torque transfer system at least partially housed in said angled portion that rotates independently of said angled portion and transfers rotational torque to said implant engaging portion;

wherein said torque transfer system is operable to torque said implant engaging portion to at least one of engage and disengage the implant.

12. The apparatus of claim 11, further comprising:

a strikeable portion;

wherein said strikeable portion may be struck to apply a force through said implant engaging portion substantially along said first axis to implant the implant.

13. The apparatus of claim 11, wherein said intermediate portion includes a parallel member;

wherein said parallel member is substantially parallel with said first axis and spaced a distance from said first axis to provide a clear view of said implant engaging portion during use of the apparatus.

14. The apparatus of claim 11, wherein said angled portion extends to allow a tool to engage said torque transfer system while providing a substantially clear view of said implant engaging portion.

15. The apparatus of claim 11, wherein said torque transfer system is operable to transfer torque around an angle defined by said angled portion relative to said implant engaging portion while providing a substantially clear view of said implant engaging portion.

16. The apparatus of claim 15, wherein said torque transfer system is selected from the group including a flexible member, a universal ball joint, an elbow joint, a transverse head tool, and a geared interconnection, a mitre gear, and combinations thereof.

17. The apparatus of claim 11, wherein said implant engaging portion includes a threaded member that is operable to be torqued with said torque transfer system;

wherein said threaded member is able to engage a selected portion of the implant during an implanting procedure.

18. The apparatus of claim 11, wherein said graspable portion is positioned proximally from said implant engaging portion;

wherein said implant engaging portion may be positioned through a dermas of the body while said graspable portion is positioned exterior to said dermas.

19. The apparatus of claim 18, wherein said torque transfer system is positioned substantially adjacent to said implant engaging portion.

20. The apparatus of claim 19, further comprising:

a torque supplying instrument;

wherein said torque supplying instrument can supply a torque to said torque transfer system;

wherein said torque supplying instrument may be positioned distally from said graspable portion.

21. An apparatus for implanting a prosthetic into a selected portion of a body comprising:

a prosthetic holding portion extending along a first axis, said prosthetic holding portion including an outer housing;

a graspable portion extending along said first axis;

a clearance portion between said prosthetic holding portion and said graspable portion, said clearance portion extending along a second axis that is offset from said first axis to provide a user of said apparatus with a clear view of said prosthetic holding portion; and

a rotational torque transfer system including a torque transferring portion at said prosthetic holding portion that rotates independently of said outer housing and a driving portion extending from said prosthetic holding portion to said clearance portion, said torque transferring portion is angled relative to said driving portion;

wherein said torque transfer system applies rotational torque to said implant to engage and disengage said implant.

22. The apparatus of claim 21, wherein said torque transferring portion further comprises threads.

23. The apparatus of claim 22, wherein said threads cooperate with threads of said implant.

24. The apparatus of claim 21, wherein said torque transferring portion further comprises first teeth and said driving portion further comprises second teeth;

and

wherein said first teeth cooperate with said second teeth to transfer torque between said torque transferring portion and said driving portion.

25. The apparatus of claim 21, further comprising a strikable head at said graspable portion.

26. The apparatus of claim 21, wherein a portion of said torque transferring portion extends beyond a surface of said clearance portion, and said clearance portion that extends along said second axis is substantially parallel to said first axis.

27. The apparatus of claim 21, further comprising a first angled portion between said clearance portion and said prosthetic holding portion and a second angled portion between said clearance portion and said graspable portion.

28. The apparatus of claim 27, wherein said driving portion extends through said first angled portion, said driving portion rotates independently of said first angled portion.