Method and apparatus for providing a modular acetabular prosthesis

• US 6,416,553 B1
• Filed: 03/29/2000
• Issued: 07/09/2002
• Est. Priority Date: 03/31/1999
• Status: Expired due to Term

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Incorporated (Zimmer Biomet Holdings, Inc.)
• Inventors: Hershberger, Troy W., White, John R.
• Primary Examiner(s): Isabella, David J.
• Application Number:
  US09/537,505
• Time in Patent Office: 832 Days
• Field of Search: 623/22.21, 623/22.24, 623/22.25, 623/22.28, 623/22.33, 623/22.34, 623/22.35, 623/22.36, 623/22.37, 623/22.38
• US Class Current: 623/22.38
• CPC Class Codes: A61B 17/1604 Chisels; Rongeurs; Punches; Stamps
• CPC Class Codes: A61B 17/1631 Special drive shafts, e.g. flexible shafts A61B17/1642, A61B17/164 take precedence
• CPC Class Codes: A61B 17/1666 for the acetabulum
• CPC Class Codes: A61B 17/1746 for the acetabulum
• CPC Class Codes: A61B 17/28 Surgical forceps for holding suture needles or materials A61B17/0483; for removing or smashing calculi A61B17/221; surgical scissors A61B17/3201 ; obstetrical forceps A61B17/44; for inserting intraocular lenses A61F2/1662; hand-held gripping tools in general B25B7/00 ]
• CPC Class Codes: A61B 17/68 Internal fixation devices , including fasteners and spinal fixators, even if a part thereof projects from the skin bone staples A61B17/0642
• CPC Class Codes: A61B 17/8047 wherein the additional element surrounds the screw head in the plate hole A61B17/8052 takes precedence
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61B 2090/062 penetration depth
• CPC Class Codes: A61F 2/30721 Accessories
• CPC Class Codes: A61F 2/30723 Plugs or restrictors for sealing a cement-receiving space tools for inserting plugs A61F2/4614; sealing collars for use during cementing A61B17/8808
• CPC Class Codes: A61F 2/30749 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• CPC Class Codes: A61F 2/32 for the hip
• CPC Class Codes: A61F 2/34 Acetabular cups
• CPC Class Codes: A61F 2/4603 for insertion or extraction of endoprosthetic joints or of accessories thereof
• CPC Class Codes: A61F 2/4609 of acetabular cups
• CPC Class Codes: A61F 2/4637 for connecting or disconnecting two parts of a prosthesis
• CPC Class Codes: A61F 2/4684 Trial or dummy prostheses
• CPC Class Codes: A61F 2002/30143 hexagonal
• CPC Class Codes: A61F 2002/30146 : octagonal
• CPC Class Codes: A61F 2002/30153 : rectangular
• CPC Class Codes: A61F 2002/30187 : D-shaped or half-disc-shaped
• 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 2002/30352 : Protrusion and recess of D-shaped cross-section
• CPC Class Codes: A61F 2002/30364 : Rotation about the common longitudinal axis
• CPC Class Codes: A61F 2002/30367 : with additional means for preventing said rotation
• CPC Class Codes: A61F 2002/30378 : Spherically-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30433 : using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2002/30495 : using a locking ring
• CPC Class Codes: A61F 2002/30538 : for adjusting angular orientation
• CPC Class Codes: A61F 2002/3054 : about a connection axis or implantation axis for selecting any one of a plurality of radial orientations between two modular parts, e.g. Morse taper connections, at discrete positions, angular positions or continuous positions
• CPC Class Codes: A61F 2002/30576 : with extending fixation tabs
• CPC Class Codes: A61F 2002/30578 : having apertures, e.g. for receiving fixation screws
• CPC Class Codes: A61F 2002/30594 : slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots
• CPC Class Codes: A61F 2002/30604 : modular
• CPC Class Codes: A61F 2002/30616 : Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/30682 : Means for preventing migration of particles released by the joint, e.g. wear debris or cement particles
• CPC Class Codes: A61F 2002/30708 : Means for distinguishing between left-sided and right-sided devices, Sets comprising both left-sided and right-sided prosthetic parts
• CPC Class Codes: A61F 2002/30774 : internally-threaded
• CPC Class Codes: A61F 2002/30787 : inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/3079 : Stepped or enlarged apertures, e.g. having discrete diameter changes
• CPC Class Codes: A61F 2002/30822 : Circumferential grooves
• CPC Class Codes: A61F 2002/30841 : Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• 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 2002/3429 : with an integral peripheral collar or flange, e.g. oriented away from the shell centre line
• CPC Class Codes: A61F 2002/343 : partial, i.e. not extending along the entire equatorial circumference
• CPC Class Codes: A61F 2002/3432 : having apertures for receiving fixation screws
• CPC Class Codes: A61F 2002/3482 : Two hemispherical halves having completely different structures
• CPC Class Codes: A61F 2002/3611 : Heads or epiphyseal parts of femur
• CPC Class Codes: A61F 2002/3625 : Necks
• CPC Class Codes: A61F 2002/4629 : connected to the endoprosthesis or implant via a threaded connection
• CPC Class Codes: A61F 2002/4631 : the prosthesis being specially adapted for being cemented
• CPC Class Codes: A61F 2002/4638 : Tools for performing screwing, e.g. nut or screwdrivers, or particular adaptations therefor
• CPC Class Codes: A61F 2002/4662 : for measuring penetration depth
• CPC Class Codes: A61F 2002/4668 : for measuring angles
• 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 2220/0041 : using additional screws, bolts, dowels or rivets, e.g. connecting screws
• CPC Class Codes: A61F 2230/0017 : Angular shapes
• CPC Class Codes: A61F 2230/0019 : rectangular
• CPC Class Codes: A61F 2230/0034 : D-shaped
• CPC Class Codes: A61F 2250/0006 : for adjusting angular orientation
• CPC Class Codes: A61F 2250/0084 : Means for distinguishing between left-sided and right-sided devices; Sets comprising both left-sided and right-sided prosthetic parts
• 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

Abstract

An acetabular prosthesis for implantation in an acetabulum includes an acetabular cup and a modular attachment component. The acetabular cup includes an outer surface operable to be received in the acetabulum and an inner surface operable to receive a bearing liner. The modular attachment component includes an attachment member and an engagement member. The attachment member is operable for use in attaching the modular attachment component to the acetabular cup and the engagement member is operable to engage a region of the acetabulum. The attachment member may nest within an anti-rotation counterbore or be slidably received within a channel of an attachment plate extending from the acetabular cup. The engagement member may be an elongated intramedullary blade, a flange or a hook.

Claims

1. An acetabular prosthesis for implantation in an acetabulum and surrounding pelvis, said acetabular prosthesis comprising:

an acetabular cup having an outer surface operable to be received in the acetabulum and an inner surface operable to receive a bearing liner;

an anti-rotation counterbore defined by said inner surface of said acetabular cup, said anti-rotation counterbore is formed by a sidewall extending along said inner surface of said acetabular cup and includes at least one bore located within said anti-rotation counterbore and passing through said acetabular cup; and

a modular attachment component having an attachment member and an engagement member, said attachment member operable to substantially nest within said anti-rotation counterbore and said engagement member operable to engage a region of the acetabulum, wherein upon positioning said attachment member in said anti-rotation counterbore, said modular attachment component is inhibited from rotational movement relative to said acetabular cup.

2. The acetabular prosthesis as defined in claim 1, wherein said engagement member is operable to engage a region selected from the group consisting of the acetabulum, the ischium region of the acetabulum, the ilium region of the acetabulum and the pubis region of the acetabulum.

3. The acetabular prosthesis as defined in claim 1 wherein said attachment member has a sidewall that is substantially congruent to said sidewall of said anti-rotation counterbore and said engagement member passes through said at least one bore.

4. The acetabular prosthesis as defined in claim 1 wherein said anti-rotation counterbore includes at least two bores passing through said acetabular cup, each of said bores being substantially rectangular and parallel to one another.

5. The acetabular prosthesis as defined in claim 1 wherein said sidewall includes at least one corner.

6. The acetabular prosthesis as defined in claim 5 wherein said sidewall has a D-shape.

7. The acetabular prosthesis as defined in claim 1 wherein said anti-rotation counterbore is further formed by a sidewall extending along said outer surface that defines a clearance notch within an annular surface between said inner and outer surfaces.

8. The acetabular prosthesis as defined in claim 1 wherein said modular attachment component is selected from a group consisting of an ilium flange, an ischium blade and an obturator hook.

9. The acetabular prosthesis as defined in claim 8 wherein each of said modular attachment components is operable to be secured to said acetabular prosthesis by way of a threaded set screw.

10. The acetabular prosthesis as defined in claim 1 wherein said engagement member is an elongated blade.

11. The acetabular prosthesis as defined in claim 1 wherein said engagement member is an obturator hook having a bore passing therethrough, said bore operable to be engaged by an adjustment bar to conform a shape of said obturator hook to an obturator foramen.

13. The acetabular prosthesis as defined in claim 1 wherein said engagement member is operable to engage a region selected from the group consisting of the acetabulum, the ischium region of the acetabulum, the ilium region of the acetabulum and the pubis region of the acetabulum.

12. An acetabular prosthesis for implantation in an acetabulum and surrounding pelvis, said acetabular prosthesis comprising:

an acetabular cup having an outer surface operable to be received in the acetabulum, an inner surface operable to receive a bearing liner, and an annular region extending between said outer surface and said inner surface;

an attachment plate extending from said annular region, said attachment plate defining an internal channel having an internal key positioned within said internal channel; and

a modular attachment component having an attachment member and an engagement member, said attachment member operable to be slidably received within said channel and positioned about said internal key and said engagement member operable to engage a region of the acetabulum, wherein upon said attachment member being slidably received in said channel, said modular attachment component is inhibited from rotational movement relative to said acetabular cup.

14. The acetabular prosthesis as defined in claim 12 wherein said attachment member includes a pair of wing members and a notch region operable to be slidably positioned about said internal key.

15. The acetabular prosthesis as defined in claim 12 wherein said modular attachment component is secured to said attachment plate by at least two securement points.

16. The acetabular prosthesis as defined in claim 15 wherein said modular attachment component is secured to said attachment plate by at least two set screws.

17. The acetabular prosthesis as defined in claim 12 wherein said modular attachment component is a modular ilium flange defining a plurality of holes operable to receive a plurality of bone screws.

18. The acetabular prosthesis as defined in claim 12 wherein said attachment plate angles downward from said annular region whereby said internal channel is angled relative to said annular region.

19. The acetabular prosthesis as defined in claim 12 further comprising a second modular attachment component selected from the group consisting of an ilium flange, an ischium blade, and an obturator hook.

20. An acetabular prosthesis for implantation in an acetabulum and surrounding pelvis, said acetabular prosthesis comprising:

an acetabular cup having an outer surface operable to be received in the acetabulum and an inner surface operable to receive a bearing liner;

an anti-rotation counterbore defined by said inner surface of said acetabular cup and formed by a recessed sidewall extending from said inner surface;

at least one slot defined by said acetabular cup and passing through said acetabular cup from said inner surface to said outer surface, said at least one slot located within said anti-rotation counterbore; and

a modular attachment component having an attachment member and an elongated blade, said attachment member operable for use in attaching said modular attachment component to said acetabular cup and said elongated blade operable to pass through said at least one slot to provide intramedullary fixation of said acetabular cup in a region about the acetabulum.

21. The acetabular prosthesis as defined in claim 20 wherein said elongated blade is operable to provide intramedullary fixation in the regions selected from the group consisting of the acetabulum, the ischium region of the acetabulum, the ilium region of the acetabulum and the pubis region of the acetabulum.

22. The acetabular prosthesis as defined in claim 20 wherein said elongated blade has an elongated arcuate shape.

23. The acetabular prosthesis as defined in claim 22 wherein said elongated blade has an arcuate cross section.

24. The acetabular prosthesis as defined in claim 20 wherein said attachment member has a sidewall that substantially nests within said counterbore formed about said at least one slot.

25. A method for implanting an acetabular prosthesis having a modular attachment component in an acetabulum and surrounding pelvis, said method comprising:

providing an acetabular cup having an outer surface operable to be received in the acetabulum and an inner surface operable to receive a bearing liner;

engaging the outer surface of the acetabular cup with a surgically prepared portion of the acetabulum;

locating a punch guide along the inside surface of the acetabular cup;

guiding a punch through said acetabular cup and into the acetabulum with the punch guide to form a hole in the acetabulum;

removing the punch and punch guide from the acetabular cup;

passing a portion of the modular attachment component through the acetabular cup and into the hole formed by the punch; and

securing the modular attachment component to the acetabular cup within an anti-rotation counterbore formed by a sidewall extending along said inner surface of said acetabular cup and includes at least one bore located within said anti-rotation counterbore and passing through said acetabular cup.

26. The method as defined in claim 25 further comprising passing a blade portion of the modular attachment component through the acetabular cup and into the hole formed by the punch.