System and Method for Joint Resurface Repair

• US 20100070045A1
• Filed: 11/17/2009
• Published: 03/18/2010
• Est. Priority Date: 05/01/2000
• Status: Abandoned Application

• Current Assignee: Arthrosurface, Inc (Anika Therapeutics Incorporated)
• Original Assignee: Arthrosurface, Inc (Anika Therapeutics Incorporated)
• Inventors: Ek, Steven W.
• Application Number:
  US12/620,309
• Publication Number:
  US 20100070045A1
• Time in Patent Office: Days
• US Class Current: 623/20.140
• CPC Class Codes: A61B 17/0401 Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors A61B17/0642 takes precedence; fixation devices for tendons or ligaments A61F2/0811
• CPC Class Codes: A61B 17/0487 Suture clamps, clips or locks, e.g. for replacing suture knots; Instruments for applying or removing suture clamps, clips or locks suture anchors A61B17/0401; wound clamps or clips A61B17/08; ligaturing clamps or clips A61B17/122
• CPC Class Codes: A61B 17/06166 Sutures suture materials A61L17/00; manufacture of artificial threads D01D; treatment of threads D06M
• CPC Class Codes: A61B 17/1615 Drill bits, i.e. rotating tools extending from a handpiece to contact the worked material
• CPC Class Codes: A61B 17/1635 for grafts, harvesting or transplants
• CPC Class Codes: A61B 17/1637 Hollow drills or saws producing a curved cut, e.g. cylindrical A61B10/025, A61B17/1695 take precedence
• CPC Class Codes: A61B 17/1642 for producing a curved bore
• CPC Class Codes: A61B 17/1675 for the knee
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 17/7098 wherein the implant is permeable or has openings, e.g. fenestrated screw hollow surgical screws A61B17/864
• CPC Class Codes: A61B 17/8615 at the central region of the screw head
• CPC Class Codes: A61B 17/8625 Shanks, i.e. parts contacting bone tissue
• CPC Class Codes: A61B 17/863 with thread interrupted or changing its form along shank, other than constant taper
• CPC Class Codes: A61B 17/8695 Washers surrounding screw head in plate hole A61B17/8047, between bone plate and bone A61B17/8028
• CPC Class Codes: A61B 17/888 the driver bit acting on the central region of the screw head
• CPC Class Codes: A61B 17/8894 holding the implant into or through which the screw is to be inserted A61B17/7082, A61B17/7091 take precedence
• CPC Class Codes: A61B 2017/00238 Type of minimally invasive operation A61B2017/00805 takes precedence
• CPC Class Codes: A61B 2017/00464 for use with different instruments with hole for different instruments A61B2017/22072
• CPC Class Codes: A61B 2017/0404 Buttons
• CPC Class Codes: A61B 2017/0409 Instruments for applying suture anchors for applying suture clamps, clips or locks A61B2017/0488
• CPC Class Codes: A61B 2017/044 : with a threaded shaft, e.g. screws
• CPC Class Codes: A61B 2017/0445 : cannulated, e.g. with a longitudinal through-hole for passage of an instrument
• CPC Class Codes: A61B 2017/0448 : Additional elements on or within the anchor
• CPC Class Codes: A61B 2017/045 : snug fit within the anchor
• CPC Class Codes: A61B 2090/061 : for measuring dimensions, e.g. length
• CPC Class Codes: A61B 5/4528 : Joints A61B5/4533, A61B5/4538 take precedence
• CPC Class Codes: A61B 90/06 : Measuring instruments not otherwise provided for
• CPC Class Codes: A61F 2/30756 : Cartilage endoprostheses A61F2/3603 takes precedence
• CPC Class Codes: A61F 2/30767 : Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• CPC Class Codes: A61F 2/30942 : for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
• CPC Class Codes: A61F 2/38 : for elbows or knees
• CPC Class Codes: A61F 2/3859 : Femoral components
• CPC Class Codes: A61F 2/4603 : for insertion or extraction of endoprosthetic joints or of accessories thereof
• CPC Class Codes: A61F 2/4618 : of cartilage
• CPC Class Codes: A61F 2/4657 : Measuring instruments used for implanting artificial joints for surgical instruments A61B90/06
• CPC Class Codes: A61F 2002/30065 : thermoplastic, i.e. softening or fusing when heated, and hardening and becoming rigid again when cooled
• CPC Class Codes: A61F 2002/30069 : elastomeric
• CPC Class Codes: A61F 2002/30113 : circular
• CPC Class Codes: A61F 2002/30143 : hexagonal
• CPC Class Codes: A61F 2002/30225 : Flat cylinders, i.e. discs
• CPC Class Codes: A61F 2002/30299 : umbrella-shaped or mushroom-shaped
• CPC Class Codes: A61F 2002/30324 : differing in thickness
• CPC Class Codes: A61F 2002/30332 : Conically- or frustoconically-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30354 : Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis
• CPC Class Codes: A61F 2002/30433 : using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2002/30448 : using adhesives
• CPC Class Codes: A61F 2002/30451 : soldered or brazed or welded
• 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 2002/30604 : modular
• CPC Class Codes: A61F 2002/30719 : Means for cleaning prostheses
• CPC Class Codes: A61F 2002/30772 : Apertures or holes, e.g. of circular cross section
• CPC Class Codes: A61F 2002/30831 : perpendicular with respect to each other
• CPC Class Codes: A61F 2002/30858 : Threads interrupted by grooves or sidewalls, e.g. flat sidewalls
• CPC Class Codes: A61F 2002/30871 : Trapezoidal threads
• CPC Class Codes: A61F 2002/30873 : Threadings machined on non-cylindrical external surfaces
• CPC Class Codes: A61F 2002/30878 : with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
• CPC Class Codes: A61F 2002/30879 : Ribs
• CPC Class Codes: A61F 2002/30892 : parallel
• CPC Class Codes: A61F 2002/30896 : perpendicular with respect to each other
• CPC Class Codes: A61F 2002/30943 : using mathematical models
• CPC Class Codes: A61F 2002/30948 : using computerized tomography, i.e. CT scans
• CPC Class Codes: A61F 2002/30952 : using CAD-CAM techniques or NC-techniques
• CPC Class Codes: A61F 2002/30957 : using a positive or a negative model, e.g. moulds
• CPC Class Codes: A61F 2002/4635 : using minimally invasive surgery
• CPC Class Codes: A61F 2002/4658 : for measuring dimensions, e.g. length
• CPC Class Codes: A61F 2002/4661 : for measuring thickness
• CPC Class Codes: A61F 2002/4662 : for measuring penetration depth
• CPC Class Codes: A61F 2002/4663 : for measuring volumes or other three-dimensional shapes
• CPC Class Codes: A61F 2002/4681 : by applying mechanical shocks, e.g. by hammering
• CPC Class Codes: A61F 2210/0071 : thermoplastic
• 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 2220/0041 : using additional screws, bolts, dowels or rivets, e.g. connecting screws
• CPC Class Codes: A61F 2220/005 : using adhesives
• CPC Class Codes: A61F 2220/0058 : soldered or brazed or welded
• CPC Class Codes: A61F 2230/0006 : circular
• CPC Class Codes: A61F 2230/0017 : Angular shapes
• CPC Class Codes: A61F 2230/0069 : cylindrical
• CPC Class Codes: A61F 2230/0093 : Umbrella-shaped, e.g. mushroom-shaped
• CPC Class Codes: A61F 2250/0036 : differing in thickness
• CPC Class Codes: A61F 2250/0092 : Means for cleaning prostheses
• 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 2310/00059 : Chromium or Cr-based alloys
• CPC Class Codes: A61F 2310/00089 : Zirconium or Zr-based alloys
• CPC Class Codes: A61F 2310/00095 : Niobium or Nb-based alloys
• CPC Class Codes: A61F 2310/00203 : containing alumina or aluminium oxide
• CPC Class Codes: A61F 2310/00239 : containing zirconia or zirconium oxide ZrO2
• CPC Class Codes: A61F 2310/00796 : Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite

Abstract

An implant for installation into a portion of an articular surface includes a protrusion configured to cover an un-excised portion of articular surface proximate to the implant. Another implant may form a cavity to allow the un-excised portion of articular surface to remodel over a perimeter edge of the implant. The implant may also include indentations such as grooves to promote articular cartilage remodeling over a portion of the load bearing surface of the implant. An elongated or non-round implant is also provided having two opposing concentric arcuate shaped sides, as well as a method to seat such an implant in an articular surface. A method for seating an implant without cutting articular cartilage is also provided.

Claims

1. An implant comprising:

a bone-facing distal surface; and

a proximal surface;

wherein said bone-facing distal surface and said proximal surface define an outer perimeter comprising at least two arcuate sections each having a concentric arcuate shape with a common center and a first and a second generally opposing side section extending generally along a length of said implant between said at least two arcuate shaped sections, wherein said outer perimeter has a truncated circular shape.

2. The implant of claim 1, wherein said truncated circular shape comprises a circular shape truncated on two opposed sides.

3. The implant of claim 1, further comprising a protrusion extending around at least a portion of said implant, said protrusion configured to cover an un-excised portion of an articular surface proximate said implant.

4. The implant of claim 1, wherein said implant further comprises:

a width extending between said two opposing side sections and through said common center; and

a length extending between said two arcuate sections and through said common center;

wherein said width is less than said length.

5. The implant of claim 4, wherein said width extends along a medial-lateral (ML) curvature of said implant and said length extends along an anterior-posterior (AP) curvature of said implant.

6. A system comprising:

a reamer configured to remove a portion of a patient'"'"'s articular surface in an area proximate to a defect site to form an excision site, said reamer comprising a blade portion configured to create a circular cutting projection when rotated about a longitudinal axis of said reamer, said circular cutting projection having a diameter greater than a width of said patient'"'"'s articular surface in said portion to be removed; and

an implant comprising;

a bone-facing distal surface; and

a proximal surface;

wherein said bone-facing distal surface and said proximal surface define an outer perimeter comprising at least two arcuate sections each having a concentric arcuate shape with a common center and a first and a second generally opposing side section extending generally along a length of said implant between said at least two arcuate shaped sections, wherein said outer perimeter has a truncated circular shape.

7. The system of claim 6, wherein said bone-facing distal surface is configured to match with said excision site.

8. The system of claim 7, wherein said outer perimeter of said implant corresponds to a perimeter of said excision site.

9. The system of claim 6, further comprising a guide pin having a length configured to extend generally perpendicular to said articular surface proximate said defect site, said guide pin defining a working axis along said length of said guide pin.

10. The system of claim 9, wherein said reamer is configured to translate along working axis of said guide pin.

11. The system of claim 6, wherein said implant further comprises a screw configured to engage bone beneath said removed articular surface along said working axis.

12. The system of claim 6, wherein said reamer comprises a generally circular blade portion.

13. The system of claim 12, wherein said reamer comprises a shaft extending along said longitudinal axis of said reamer, wherein said generally circular blade portion extends generally radially outwardly from said shaft.

14. The system of claim 12, wherein said generally circular blade portion is rotated about said shaft.

15. The system of claim 6, wherein said reamer comprises:

a shaft extending along said longitudinal axis of said reamer; and

a cutting blade extending generally radially outwardly from said shaft arm.

16. The system of claim 15, wherein said cutting blade comprises an offset

17. The system of claim 16, wherein said bone-facing distal surface of said implant includes a non-planar contour and wherein said offset arm of said cutting blade comprises a non-planar cutting surface configured to create said excision site including a base portion having a non-planar contour generally matching said non-planar contour of bone-facing distal surface of said implant.

18. An implant for installation into an excision site formed within a patient'"'"'s articular surface, said implant comprising:

a bone-facing distal surface having a non-planar contour configured to match with a non-planar base portion of said excision site;

a screw extending generally outwardly from bone-facing distal surface, said screw configured to secure said implant within said excision site;

a proximal surface having a contour based on an original surface contour of said excised portion of said articular surface; and

an outer perimeter comprising at least two arcuate sections each having a concentric arcuate shape with a common center and a first and a second generally opposing side section extending generally along a length of said implant between said at least two arcuate shaped sections, wherein said outer perimeter has a truncated circular shape.

19. The implant of claim 18, wherein said truncated circular shape comprises a circular shape truncated on two opposed sides.

20. The implant of claim 18, wherein said implant further comprises:

a width extending between said two opposing side sections and through said common center, said width extending along a medial-lateral (ML) curvature of said implant; and

a length extending between said two arcuate sections and through said common center, said length extending along a anterior-posterior (AP) curvature of said implant;

wherein said width is less than said length.