System and method for retrograde procedure

• US 7,914,545 B2
• Filed: 01/05/2006
• Issued: 03/29/2011
• Est. Priority Date: 12/03/2002
• Status: Expired due to Fees

• Current Assignee: Arthrosurface, Inc (Anika Therapeutics Incorporated)
• Original Assignee: Arthrosurface, Inc (Anika Therapeutics Incorporated)
• Inventors: Ek, Steven W.
• Primary Examiner(s): Barrett; Thomas C
• Assistant Examiner(s): Waggle, Jr.; Larry E
• Application Number:
  US11/326,133
• Publication Number:
  US 20060195112A1
• Time in Patent Office: 1,909 Days
• Field of Search: 606 86- 89, 606/96, 606/310, 606/313, 606 72- 73, 606 79- 80, 606/82, 606/84, 606167-189, 623/22.4, 30151-164, 303/29
• US Class Current: 606/180
• CPC Class Codes: A61B 17/1617 with mobile or detachable parts
• CPC Class Codes: A61B 17/1675 for the knee
• CPC Class Codes: A61B 17/1714 for applying tendons or ligaments implements for applying tendons or ligaments A61F2/0805
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61F 2/30756 Cartilage endoprostheses A61F2/3603 takes precedence
• CPC Class Codes: A61F 2/4657 Measuring instruments used for implanting artificial joints for surgical instruments A61B90/06
• CPC Class Codes: A61F 2002/30075 swellable, e.g. when wetted
• CPC Class Codes: A61F 2002/30228 Cylinders of elliptical or oval basis
• CPC Class Codes: A61F 2002/30331 made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2002/305 Snap connection
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30881 Circumferential ribs, flanges or fins
• CPC Class Codes: A61F 2002/4631 the prosthesis being specially adapted for being cemented
• CPC Class Codes: A61F 2210/0061 swellable
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0033 made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2230/0069 cylindrical
• CPC Class Codes: A61F 2310/00017 Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00029 Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
• CPC Class Codes: A61F 2310/00203 : containing alumina or aluminium oxide
• CPC Class Codes: A61F 2310/00239 : containing zirconia or zirconium oxide ZrO2

Abstract

A system and method may be used for accessing an articular surface and for preparing an implant site on the articular surface. The method may include locating a portion of the articular. An access passage may be drilled towards the articular surface though bone behind the articular surface. An implant site may be excised in the articular surface relative to an axis defined by the access passage.

Claims

1. A system for creating an implant site on an articular surface of a bone comprising:

a sheath comprising a generally tubular body defining a passageway extending along a longitudinal axis of said sheath from a proximal end to a distal end of said sheath, wherein at least a portion of an outer surface of said tubular body includes a threaded portion configured to engage with a tunnel extending within said bone such that said sheath is configured to provide positive alignment with a reference axis of said tunnel extending through said articular surface; and

an excision device comprising;

a shaft configured to be received through said proximal end of said sheath and to axially rotate within said passageway relative to said longitudinal axis of said sheath; and

at least one cutter coupled to said shaft to axially rotate with said shaft relative to said longitudinal axis of said sheath to excise a least a portion of said articular surface in a retrograde manner as said at least one cutter is urged towards said distal end of said sheath, said at least one cutter having at least a portion of a cutting surface extending radially outwardly beyond an outer diameter of said generally tubular body of said sheath and a shelf configured to contact against said distal end of said sheath to control said depth of said implant site as said excision device is urged towards said distal end of said sheath in a retrograde manner.

2. The system of claim 1 wherein said sheath comprises a head disposed proximate a proximal end of said sheath.

3. The system of claim 2 wherein said head comprises an outer diameter greater than an outer diameter of said tubular body.

4. The system of claim 2 wherein said head is configured to engage with a driver for advancing said sheath with respect to said bone.

5. The system of claim 4 wherein said head comprises a socket configured to engage with and transmit torque from a driver head of said driver.

6. The system of claim 5 wherein said driver comprises a shaft configured to extend through at least a portion of said sheath.

7. The system of claim 4, wherein said head further includes a socket comprising a shoulder configured to allow said drive head to positively seat in said socket.

8. The system of claim 1 wherein an outer diameter of said tubular body and a pitch of said threaded portion are configured to facilitate alignment of said sheath with an axis of said tunnel.

9. The system of claim 1 wherein a distal end of said sheath comprises a taper configured to facilitate alignment of said sheath with a tunnel extending within said bone.

10. The system of claim 1, wherein said shelf comprises a generally flat profile.

11. The system of claim 1, wherein said shelf comprises a generally relieved profile.

12. The system of claim 1, wherein said shelf comprises a generally rounded profile.

13. The system of claim 1 further comprising a driver comprising a driver head configured to transmit torque to said sheath to advance said sheath within said tunnel towards said articular surface, said driver also comprising a shaft configured to be received within said passageway, wherein at least a portion of said shaft is configured to extend a predetermined distance beyond said distal end of said sheath, said predetermined distance substantially corresponding to said depth of said implant site.

14. The system of claim 1, wherein said distal end of said sheath is configured to be received a predetermined distance from said articular surface within a tunnel generally extending from said bone to said articular surface, said predetermined distance generally corresponding to a depth of said implant site.

15. The system of claim 14, wherein an outer opening of said tunnel comprises a taper configured to facilitate alignment of said sheath with said tunnel.

16. The system of claim 14, wherein said sheath is configured to engage with a driver for advancing said sheath within said tunnel.